Abstract: Methods and systems for a photonic interposer are disclosed and may include receiving one or more continuous wave (CW) optical signals in a silicon photonic interposer from an optical source external to the silicon photonic interposer. The received CW optical signals may be processed based on electrical signals received from a CMOS electronics die bonded to the interposer, and modulated optical signals may be received in the interposer via optical couplers on the interposer. Electrical signals may be generated in the interposer based on the received modulated optical signals, and may be communicated to the CMOS electronics die. The generated electrical signals to may be communicated to the CMOS electronics die via copper pillars. The CW optical signals may be received in the interposer from an optical source assembly coupled to the interposer. The CW optical signals may be received from optical fibers coupled to the interposer.

Abstract: An optical transceiver system includes a transmitter transmitting out a first light beam with a first wavelength, a receiver receiving a second light beam with a second wavelength; an optical fiber transmitting the first light beam and the second light beam; and a light guide member. The light guide member includes a lens block having a first side surface facing toward both the transmitter and the receiver, and a second side surface facing toward the optical fiber. A first lens portion and a second lens portion formed on the first side surface for optically coupling the respective transmitter and receiver, a third lens portion formed on the second side surface for optically coupling the optical fiber, and a wavelength divisional multiplexer embedded in the lens block. The wavelength divisional multiplexer receives and divides the first light beam and the second light beam.

Abstract: Embodiments of the present invention relate to a bi-direction optical sub-assembly and an optical transceiver. A transmitter in the bi-direction optical sub-assembly is configured to transmit a first communication signal or a detection signal, where the first communication signal or the detection signal is input from a first end of a first optical path and output from a second end of the first optical path, enters a second end of a third optical path through reflection of a WDM optical filter, and is input from a first end of the third optical path to an optical fiber. A second communication signal received by the optical fiber is input from the first end of the third optical path and output from the second end of the third optical path, and the second signal is received by a BOSA receiver through transmission of the WDM optical filter.

Abstract: Multiple pins extend from the outside to the inside of an optical sub-assembly. A light receiver or a light transmitter is arranged inside the optical sub-assembly. A receiver circuit and transmitter circuit (TX) are arranged inside the optical sub-assembly and connected between the multiple pins and the light receiver and the light transmitter. The receiver circuit comprises a receiver communication interface in order to transform an output signal of the light receiver into a communication signal, and wherein the transmitter circuit comprises a transmitter communication interface to transform a communication signal into an input signal of the light transmitter. A control interface is connected with the receiver circuit and the transmitter circuit arranged inside the optical sub-assembly, wherein the control interface is connectable to two of the multiple pins.

Abstract: A bidirectional interface for multimode optical fiber includes a receive/transmit optical fiber port operable to connect to a multimode optical fiber, a wavelength separating module in communication with the receive/transmit optical fiber port, an optical receiver module in communication with the wavelength separating module and configured to receive optical signals at a first wavelength via the wavelength separating module and the receive/transmit optical fiber port, and an optical transmit module in communication with the wavelength separating module and configured to transmit at a second wavelength via the wavelength separating module and the receive/transmit optical fiber port.

Abstract: Implementations of an apparatus including an optical circuit switch (OCS) having a plurality of OCS input/output ports, at least one optical circulator having a port optically coupled to a corresponding one of the plurality of OCS input/output ports and a reflection mitigation positioned in the optical path between each optical circulator port and its corresponding OCS input/output port and/or in the optical path inside the OCS. A corresponding optical transceiver is optically coupled to each of the at least one optical circulators. Each optical transceiver includes a transmitter optically coupled to one port of the optical circulator and a receiver optically coupled to another port of the optical circulator.

Abstract: At the time of assembly of an optical transmission/reception module, a test variable wavelength light source 22 for outputting a test light signal is connected to a connector 8 of an optical fiber 7, and a large-diameter PD 23 measures a transmission loss in a light wavelength band limiting filter 12 while a rotational position determining unit 24 rotates a fiber ferrule 5, so that the rotational position determining unit 24 determines the rotational position ?loss-min of the fiber ferrule 5 which minimizes the transmission loss in the light wavelength band limiting filter 12, and aligns the fiber ferrule 5 at the rotational position ?loss-min.

Abstract: Exemplary optical communication devices are described which, in certain embodiments, derive power optically from and communicate optically to a reading device. The communication devices may also receive data from modulated light from the reading device to achieve a bi-directional optical communication link between the self-powered optical communication device and the reading device. In some embodiments, the communication device is powered by ambient light, such as sunlight, captures data from a sensor, and communicates the stored data some time later to a reading device. In some embodiments, the communication device is powered locally and communicates through air, optical fiber, or other medium with another communication device.

Abstract: A pluggable platform in small form factor is described. In one embodiment, the pluggable platform is designed to accommodate passive optical devices and may retrofit into an existing system. Further, the pluggable platform in small form factor is provided with an interface for tractability of the passive optical devices being supported.

Abstract: An optical communication device, such as a transceiver, can send outgoing information over an optical link and receive incoming information via the link. The link, for example an optical fiber, can simultaneously transmit outgoing light carrying outgoing information and incoming light carrying incoming information. The communication device can comprise a detector outputting electrical signals in response to receiving optical signals, effectively converting signals from the optical domain to the electrical domain. The detector can receive a mixture of the incoming and the outgoing light, thereby producing an electrical signal containing imprints of both the incoming data and the outgoing data. The communication device can process the electrical signal to differentiate between the incoming data and the outgoing data.

Abstract: An optical interconnection module (100) for connecting to a media converter module (20) as part of a hybrid electrical-optical network (10) is disclosed. The optical interconnection module includes a transmitter connector (136T) having transmit ports (POT(i)) and a receiver connector having receive ports (POR(i)). The optical interconnection module also has transmit/receive ports (POF(i)) that are optically connected via a set (F) of fibers (142) to the transmit and receive ports of the transmitter and receiver connectors using one of two port configurations. Hybrid electrical-optical networks that utilize a trunk cable (60) to connect the media converter module to the optical interconnection module are also disclosed.

Abstract: Bidirectional parallel optical transceiver modules for use in optical links and methods for communicating bidirectionally over the links are provided. The bidirectional parallel optical transceiver modules have features that ensure relatively low optical crosstalk, relatively low return loss and relatively high SNR. In addition, the modules have an in-line, zig-zag configuration that allows the modules to be compact and to have high bidirectional channel density for achieving high bandwidth.

Abstract: Techniques, apparatus and systems to provide carrier signal transmission in reciprocal transmission architecture networks for optical communications.

Abstract: A bidirectional optoelectronic device comprises a photodetector, a light source, and a drive circuit for the light source. The light source has first and second electrical leads for receiving an input electrical signal, and the drive circuit can be arranged to apply first and second portions of the input electrical signal to the first and second electrical leads, respectively, wherein the second portion of the input electrical signal is a scaled, inverted substantial replica of the first portion of the input electrical signal. A protective encapsulant can be applied that includes hollow dielectric microspheres to reduce electrical cross-talk, and that can further include an optical absorber to reduce optical cross-talk. A waveguide substrate of the device can include light collector(s) or trap(s) for redirecting and attenuating portions of optical signals propagating in waveguide layers on the substrate but not guided by a waveguide.

Abstract: Exemplary embodiments of the invention relate to an optical transceiver in which the base portion is made of a light permeable material and configured to emit light representative of the status of certain transceiver parameters. The transceiver includes a housing which at least partially encloses the base portion. The base portion connects to a printed circuit board on which a light-emitting diode is mounted. Light from the light-emitting diode is conducted to front portion of the base, which is light permeable, through a light-pipe assembly, thereby illuminating the entire front portion of the base. Because the front portion of the base is not enclosed within the housing the light emitted is clearly visible from a distance even when fiber connectors are plugged into the transceiver receptacles.

Abstract: The present invention is to provide a method applicable to a fiber-optic transceiver including a transmitter optical subassembly (TOSA) provided therein with a laser diode, but without a monitoring photodiode, a laser driver controlled by a controller IC for driving the laser diode to generate a laser beam, and a thermal sensor for sensing temperature of the laser diode. The method includes executing an approximation process to characteristic data, i.e.

Abstract: An optoelectronic transceiver includes an optoelectronic transmitter, an optoelectronic receiver, memory, and an interface. The memory is configured to store digital values representative of operating conditions of the optoelectronic transceiver. The interface is configured to receive from a host a request for data associated with a particular memory address, and respond to the host with a specific digital value of the digital values. The specific digital value is associated with the particular memory address received from the host. The optoelectronic transceiver may further include comparison logic configured to compare the digital values with limit values to generate flag values, wherein the flag values are stored as digital values in the memory.

Abstract: A data transmission system and method are provided. The data transmission system includes a first link partner and an optical transceiver unit. The first link partner includes a controller. When the first link partner is in an abnormal operation mode, the controller controls the first link partner to exit from the abnormal operation mode. The optical transceiver unit is coupled between the first link partner and a second link partner and performs data transmission between the first link partner and the second link partner. According to the data transmission system and method, one link partner can accurately detect whether another link partner is coupled to the one link partner through an optical transceiver unit. Accordingly, data transmission between the two link partners can be stably performed through the optical transceiver unit.

Abstract: Reliable data transmission is secured without inviting large design changes by means of configuring an optical data transmission device in a manner so as to be provided with: data conversion units and optical communication control units that transmit to each of a first communication unit and a second communication unit disposed movably relative to one another an optical signal modulated in response to wired-line data input from a wired line, and that output wired-line data demodulated from the received optical signal to the wired line; a bit data input unit that receives input of bit data for emergency stops; a bit data output unit that outputs bit data for emergency stops; and bit data communication control units that control in a manner so as to transmit/receive input bit data via the optical communication control units using optical signals that are isolated from the optical signal corresponding to the wired-line data.

Abstract: Monitoring signals associated with operating parameters of an optical transceiver are ascertained by using a comparator arrangement external to a micro-controller unit. Monitoring signals associated with these operating parameter are provided as inputs to a discrete arrangement of comparators and then evaluated against a known reference voltage source. The reference source is swept across a known range of values, and when the output of the comparator changes state, the value of the reference input associated with this transition is defined as the value of the specific monitoring input signal and stored within the proper memory location within the microcontroller portion of the transceiver monitor circuit. The digital output signal of the comparator is applied as an input to the microcontroller, which recognizes this digital signal as defining the specific value of the reference signal to use and equate with the value of the monitored signal.

Abstract: Disclosed by way of exemplary embodiments, a 40/50/100 Gb/s Optical Transceivers/transponders which use opto-electronic components at data rates collectively that are lower than or equal to half the data rate, using two optical duobinary carriers. More specifically, the exemplary embodiments of the disclosed optical transceivers/transponders relate to a 43 Gb/s 300pin MSA and a 43˜56 Gb/s CFP MSA module, both include a two-carrier optical transceiver and the appropriate hardware architecture and MSA standard interfaces. The two-carrier optical transceiver is composed of a pair of 10 Gb/s optical transmitters, each using band-limited duobinary modulation at 20˜28 Gb/s. The wavelength channel spacing can be as little as 19˜25 GHz. The same principle is applied to a 100 Gb/s CFP module, which is composed of four tunable 10 Gb/s optical transmitters, with the channel spacing between optical carriers up to a few nanometers.

Abstract: A temperature controlled multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The multi-channel TOSA generally includes an array of lasers optically coupled to an arrayed waveguide grating (AWG) to combine multiple optical signals at different channel wavelengths. A temperature control system may be used to control the temperature of both the array of lasers and the AWG with the same temperature control device, e.g., a thermoelectric cooler (TEC). The multi-channel optical transceiver may also include a multi-channel receiver optical subassembly (ROSA). The optical transceiver may be used in a wavelength division multiplexed (WDM) optical system, for example, in an optical line terminal (OLT) in a WDM passive optical network (PON).

Abstract: An apparatus and method are provided for two-channel bidirectional communications between devices for enhanced data signals. In particular, the techniques describe a first transceiver channel configured to receive first data communications from a first transceiver port. A second transceiver channel is also configured to receive second data communications from a second transceiver port. A set of signal pins are configured to receive the first data communications from the first transceiver port at a first group of signal pins and to receive the second data communications from the second transceiver port at a second group of signal pins. The first group of signal pins comprises signal pins in a signal-signal-ground configuration and the second group of signal pins comprises signal pins in a ground-signal-signal-ground configuration.

Abstract: Methods and systems for a photonic interposer are disclosed and may include receiving one or more continuous wave (CW) optical signals in a silicon photonic interposer from an external optical source, either from an optical source assembly or from optical fibers coupled to the silicon photonic interposer. The received CW optical signals may be processed based on electrical signals received from the electronics die. The modulated optical signals may be received in the silicon photonic interposer from optical fibers coupled to the silicon photonic interposer. Electrical signals may be generated in the silicon photonic interposer based on the received modulated optical signals, and may then be communicated to the electronics die via copper pillars. Optical signals may be communicated into and/or out of the silicon photonic interposer utilizing grating couplers. The electronics die may comprise one or more of: a processor core, a switch core, or router.

Abstract: A system for transmitting data packets over a network. The system includes a plurality of first nodes, wherein each first node has a first transceiver configured to transmit a data packet at at least one of a plurality of first wavelengths and receive a data packet at an assigned first wavelength, wherein each first node is configured to pass incoming data packets not transmitted at the assigned first wavelength, a plurality of second nodes, wherein each second node has a second transceiver configured to transmit a data packet at least one of a plurality of second wavelengths and receive a data packet at an assigned second wavelength, wherein each second node is configured to pass incoming data packets not transmitted at the assigned second wavelength, and at least one optical fiber operably connecting the transceivers.

Abstract: An optical communication apparatus includes a substrate having a through hole; an optical element which includes a light terminal for receiving or sending light and is mounted on a surface of the substrate so that the light terminal faces an opening of the through hole; a light guide member which includes a first lens facing the light terminal of the optical element, a surrounding portion which surrounds a periphery of the first lens on a side of the opening of the through hole, and a guide portion which is provided inside the through hole and guides the light between the opening and another opening of the through hole; and a light waveguide which is arranged on a side of another surface of the substrate and includes a light guide optically connected to the light guide member on a side of the another opening of the through hole.

Abstract: A digital burst mode communication system operates at a fixed wavelength for transmission and reception of burst mode signals using a pair of transceivers and a single optical cable. The stray noise level in the system is significantly reduced by use of angled plate absorbers that receive scattered transmission burst signal from a 45 degree partially reflecting mirror. Isolation of received burst signal from transmitted burst signal is increased to better than 30 dB. The system operates by sending only data bits across the single optical cable without scrambling or encoding preambles, significantly improving the efficiency of high speed communication.

Abstract: The present invention provides a high-speed 100G optical transceiver for InfiniBand and Ethernet with associated mapping to frame InfiniBand and Ethernet into GFP-T. The optical transceiver utilizes an architecture which relies on standards-compliant (i.e., multi-sourced) physical client interfaces. These client interfaces are back-ended with flexible, programmable Field Programmable Gate Array (FPGA) modules to accomplish either InfiniBand or Ethernet protocol control, processing, re-framing, and the like. Next, signals are encoded with Forward Error Correction (FEC) and can include additional Optical Transport Unit (OTU) compliant framing structures. The resulting data is processed appropriately for the subsequent optical re-transmission, such as, for example, with differential encoding, Gray encoding, I/Q Quadrature encoding, and the like. The data is sent to an optical transmitter block and modulated onto an optical carrier. Also, the same process proceeds in reverse on the receive side.

Abstract: Methods, algorithms, architectures, circuits, and/or systems for dynamically allocating memory for storing parametric data in optical transceivers are disclosed. The optical transceiver can include an optical receiver configured to receive optical data; an optical transmitter configured to transmit optical data; a microprocessor configured to access data for each of a plurality of parameters that are related to operation of at least one of the optical receiver and the optical transmitter; one or more memories configured to store the data at a plurality of locations that are dynamically allocated by the microprocessor; and an interface configured to receive a request for data for one or more of the parameters from a host and provide the data in response to the request. In the present disclosure, the host is unaware of the locations at which the parametric data are stored.

Abstract: A chip scale fiber-optic device that includes a transducer that sends and receives information signals, a submount that holds the transducer in a substantially fixed position, and a multimode fiber lens that conveys the information signals between the transducer and an optical fiber.

Abstract: An enhanced small form-factor pluggable (SFP+) transceiver module and an SFP+ host port are provided. The enhanced SFP+ transceiver module receives a reception data signal at a data rate of 40 gigabits per second (40G). The reception data signal is sent to a transceiver bidirectional transmission unit. The transceiver bidirectional transmission unit comprises a first SFP+ connector unit configured to interface with a second SFP+ connector unit of an SFP+ host port. The reception data signal is sent from the transceiver bidirectional transmission unit to the second SFP+ connector unit of the SFP+ host port via the first SFP+ connector unit.

Abstract: Provided is an optical module. The optical module includes: an optical bench having a first trench of a first depth and a second trench of a second depth that is less than the first depth; a lens in the first trench of the optical bench; at least one semiconductor chip in the second trench of the optical bench; and a flexible printed circuit board covering an upper surface of the optical bench except for the first and second trenches, wherein the optical bench is a metal optical bench or a silicon optical bench.

Abstract: The present disclosure relates to devices comprising small form factor pluggable units (SFP) having connectors for receiving and sending signals and a processor for converting the received signals prior to sending the converted signals. Received or sent signals may comprise video signals in various analog or digital formats. Conversion of the received signals may comprise analog to digital or digital to analog conversion, serializing or deserializing a digital signal, frame synchronization of a video signal, and/or cross conversion of a video signal from a first format to a second format.

Abstract: Monolithic single and/or dual detector structures are fabricated on the emitting surface of a VCSEL and/or on a lens or glass substrate configured to be positioned along the axis of emission of an optical light source. Each monolithic detector structure includes one or two PIN detectors fabricated from amorphous silicon germanium with carbon doping or amorphous germanium with hydrogen doping. The monolithic detectors may additionally include various metallization layers, buffer layers, and/or anti-reflective coatings. The monolithic detectors can be grown on 1550 NM VCSELs used in optical transmitters, including lasers with managed chirp and TOSA modules, to reduce power and real estate requirements of the optical transmitters, enabling the optical transmitters to be implemented in long-reach SFP+ transceivers.

Abstract: A GPON module comprises a housing and a circuit board disposed in the housing. The circuit board further includes ground lines that substantially isolate regions of the circuit board, an electro-optical interface for converting an inbound optical signal to an electrical signal and processing circuitry that is arranged to provide an electrical RF signal to an RF interface. The RF interface comprises a three-pin RF connector exposed from the housing, wherein the RF connector is coupled directly to the circuit board, and two of the three pins are coupled to ground.

Abstract: An avionics device able to be installed on board an aircraft, including means of processing information and a connector able to receive and/or transmit information, the aforementioned connector including an electrical coupling interface able to transmit and/or receive information in the form of electrical signals, and an electro-optical connection interface able to convert electrical signals into optical signals and to transmit information in the form of optical signals and/or receive information in the form of optical signals and convert these optical signals into electrical signals.

Abstract: An optical engine for providing a point-to-point optical communications link between a first computing device and a second computing device. The optical engine includes a modulated hybrid micro-ring laser formed on a substrate and configured to generate an optical signal traveling parallel to the plane of the substrate. The optical engine further includes a waveguide, also formed in a plane parallel to the plane of the substrate, that is configured to guide the optical signal from the modulated ring laser to a defined region, a waveguide coupler at the defined region configured for coupling the optical signal into a multi-core optical fiber, and a multi-core optical fiber at the defined region that is configured to receive and transport the optical signal to the second computing device.

Abstract: According to one embodiment, an optically coupled insulating device includes an optical transmitter and an optical receiver. The optical transmitter includes an analog-to-digital converter, an encoder, a transmitting controller, and an electrooptical transducer. The encoder is configured to generate a transmitting signal by superimposing an output of the analog-to-digital converter onto a signal based on a clock signal. The transmitting signal is encoded to have an average duty ratio of more than zero and less than one. The transmitting controller is configured to output one of the transmitting signal and the output of the analog-to-digital converter depending on an input level of the analog signal. The electrooptical transducer is configured to convert an output of the transmitting controller into an optical signal. The optical receiver includes an optoelectrical transducer, a decoder, and a receiving controller.

Abstract: An optoelectrical connector is composed of a plug to which a wire and an optical fiber are assembled and a receptacle to which the plug is inserted and connected. A receptacle includes insulation sleeves and conductive contacts in openings of receptacle housings, and plugs include a ferrule assembled bodies which are composed of an insulation ferrule which holds an optical fiber and a conductive cylindrical member which holds the ferrule and to which a wire is assembled, in an opening of the plug housing. When the plugs are inserted into the receptacle, the contacts and the cylindrical member contact with each other and the ferrules are inserted into the sleeves. Parts which serve electrical connection are not exposed.

Abstract: An optical communication system is provided comprising of a three terminal silicon based light emitting device operating by means of avalanche carrier multiplication and emitting at the below threshold wavelength detection range for Silicon of 850 nm; a low loss optical waveguide operating in the below threshold wavelength detection range for Silicon of 850 nm; and an optical detector, wherein a complete and all-silicon optical communication system is formed being capable of transferring electrical signals in terms of optical intensity variations, such intensities then being propagated through the waveguide and being detected by the optical detector; and being converted back to electrical signals. In a particular mode of operation of the system, wavelength modulation may be obtained. In other applications, transponding action and optical amplification may be obtained.

Abstract: Disclosed is an optical floating sub-assembly, comprising a thermally conductive non rigid substance between the heat sink carrier and external casing, to minimize mechanical stress on the optical assembly. Also disclosed is a printed circuit board as an electrical interface, comprising two modules capable of converting an electrical signal to an optical signal, transmitting the optical signal and then converting the optical signal back to an electrical signal. Also disclosed is an optical assembly, comprising a heat sink with mechanical features for optical alignment.

Abstract: An optical transceiver and method for bidirectionally communicating optical signals in an optical transceiver involve an optical element that bidirectionally separates incoming and outgoing optical signals of the same wavelength. The optical element can be a diffractive element such as a grating or, alternatively, a partially reflective element such as a transparent block having a thin-film coating.

Abstract: An optical transmission system transmits an optical signal of multi-level modulation. In a transmitter module, a data string in a specified frame is rearranged into a plurality of logical lanes. A lane ID, which specifies in what logical lane out of the plurality of logical lanes a start of the data string is arranged, is assigned to a non-scrambled area in an overhead portion of the frame. The lane ID corresponding to one of the plurality of logical lanes is different from the lane IDs corresponding to the other remaining logical lanes. The optical signal is generated using the data string rearranged into the plurality of logical lanes. In a receiver, the lane ID is detected according to a majority method. The inversion of bits and the swapping of lanes are detected using the lane ID and compensated.

Abstract: An intelligent optical module to restart itself according to a command sent from the host system is disclosed. The optical module may distinguish the first state, where no optical signal is received, from the second state, where a substantial optical signal but unmodulated is received. The optical module is restarted when the second state appears with a preset pattern.

Abstract: Two or more optical transceivers coupled to each other by an optical link to optimize communication over the optical link. A first transceiver generates electrical data that represents an operational parameter for optimization. The transceiver then converts the electrical data into an optical signal and transmits the optical signal over the optical link to a second transceiver. The second transceiver recovers the electrical data from the optical signal and uses the recovered electrical data to change characteristics of the optical signal transmitted by the second transceiver.

Abstract: LED transceiver front end circuitry and related methods are disclosed that use an LED or LEDs to transmit light in a transmit state and to receive incident light in a receive state while helping to reduce effects of power supply noise and ripple and device leakage currents on incident light measurements in applications where such conditions exist. In the disclosed embodiments and implementations, a controlled voltage is applied across an LED or LEDs or a reference voltage is applied to an LED chain or LED to help reduce the effects of power supply noise and ripple and device leakage currents on incident light measurements during a receive state of operation. Further, with respect to the LED chain, one or more resistors are coupled in parallel to the LEDs in the LED chain.

Abstract: An optoelectronic device can implement an intelligent transmitter module (“ITM”), rather than a conventional TOSA, for the transmission of optical data signals. The ITM can include an optical transmitter, a CDR and driver IC, and a microcontroller and/or linear amplifier. Space available in the optoelectronic device due to using an ITM rather than a TOSA and PCB-bound CDR, driver, microcontroller, and/or linear amplifier can be used for the inclusion of one or more electronic and/or optical components. Electronic components that can be included in a device with an ITM include: an FPGA, a DSP, a memory chip, a digital diagnostic IC, a video IC, a wireless interface, and an RF interface. Optical components that can be included in a device with an ITM include: a VOA, an SOA, a MUX, a DEMUX, a polarization controller, and an optical power monitoring device.

Abstract: In a first aspect, the invention includes a radio frequency photonic transceiver, comprising: a radio frequency receiver; a radio frequency photonic transmitter; and a switch between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a second aspect, the invention includes an apparatus, comprising: a radio frequency photonic receiver; a radio frequency photonic transmitter; and a switch between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a third aspect, the invention includes a radio frequency, photonic transceiver, comprising: means for generating a radio frequency modulated optical signal; a radio frequency photonic transmitter; and means for switching between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter.

Abstract: The principles of the present invention provide for a plastic ROSA that has a metallic EMI shroud covering a portion of the plastic ROSA. The combination of the plastic ROSA and the EMI shroud provides the unexpected result of having EMI shielding substantially similar to a metal ROSA.

Abstract: An optical transmission/reception module including a filter holder on which filter mount surfaces for mounting wavelength division multiplexing filters and light wavelength band limiting filters are formed and in which a hole for guiding a light signal is formed in each of the filter mount surfaces incorporated into a housing. The wavelength division multiplexing filters and the light wavelength band limiting filters are mounted to the filter mount surfaces formed on the filter holder, respectively.