Abstract: It is shown that by modifying the photosensitivity profile it is possible to provide better adjustment of the characteristic curve of a filter, and in particular to eliminate a reflection peak that is present within the working band. The photosensitivity profile is inverted to a considerable extent. In practice, the core of the fiber has only 20% of photosensitive doping material compared with the quantity of photosensitive doping material present in the cladding of the fiber.

Abstract: An integrated optical circuit is described. The optical circuit includes a silicon substrate and waveguides disposed thereon, at least one photonic crystal is provided as a waveguide.

Abstract: Devices and methods by which fiber optic connectors, and the adapters associated with them can be installed upon mounting surfaces. A termination block is described that retains a number of adapters to receive fiber optic cable connectors for interconnection and/or cross-connection with other connectors or switching equipment. The termination block has a mounting footprint that is substantially identical to the mounting footprint of an electrical punch-down block, thus permitting ease of retrofitting. Slider panels are retained within bays in a base unit to secure adapters within the base unit. The slider panels are individually moveable so that each can be slidingly withdrawn from its bay for better access to the adapter secured therewithin. In preferred embodiments, removable markers are affixed to individual slider panels and a removable cover is provided for the termination block. Methods for mounting and retrofitting termination blocks are also described.

Abstract: A system prevents damage to at least one component of a laser apparatus that includes a laser that emits a light signal of increasing power during power up and at least one connector that receives the light signal from the laser and reflects at least a portion of the light signal when an imperfect connection exists. The system includes a detector and a monitoring circuit. The detector detects the reflected light signal from the connector. The monitoring circuit receives the reflected light signal, determines an amount of power in the reflected light signal, calculates a ratio of the power of the light signal emitted by the laser to the power in the reflected light signal, compares the ratio to a predetermined threshold to determine whether the imperfect connection exists, and shuts down the laser when the imperfect connection exists.

Abstract: In accordance with the invention, a WDM optical system comprises a transmission line with a net negative dispersion rather than the conventional net positive dispersion and a DCG with a positive dispersion rather than negative dispersion. With this design, short wavelengths entering the grating are reflected first before the long wavelengths, minimizing the path of short wavelengths within the grating and thereby avoiding short wavelength cladding loss. In advantageous embodiments, the DCG compensates for both the net negative dispersion and dispersion slope of at least two signal channels and preferably of all signal channels.

Abstract: An optical fiber transmission system comprises an optical signal source operable to generate an optical signal at a predetermined bit rate and at a signal wavelength; an optical fiber transmission link connected at a first end to the signal source, the link having dispersion characteristics at the signal wavelength; an optical amplifier serially disposed in the link; and a signal receiver connected at the second end of the Lank; in which a grating is connected in the link, the grating being chirped by an amount providing at least partial compensation of the dispersion characteristics of the link, the compensation such as to provide a signal, at the second of the link, compatible with the sensitivity requirements of the receiver at the second end of the link.

Abstract: To adjust the spectral band of an attenuating optical fiber, a section of the optical fiber is formed that has a sloping Bragg grating. To smooth the spectral band of the attenuation, it is shown that the filter section must be short. Independently of selectivity, the smoothing makes it possible to avoid distorting the filtered signal. The length of the filter section is preferably 0.7 mm.

Abstract: Apparatuses, methods, and systems are disclosed for controlling optical signal wavelength spacing by providing for simultaneous upconversion of a plurality of electrical signal on subcarrier frequencies of an optical carrier frequency with or without modulation of an electrical data signal onto the optical carrier frequency. The optical carrier lightwave is split into a plurality of split lightwaves upon which one or more electrical frequencies carrying information can be upconverted onto optical subcarriers of the lightwave carrier frequency. The relative spacings of the optical subcarrier lightwaves will thus be unaffected by variation in the carrier frequency. The optical subcarrier lightwaves can then be recombined to form the optical data signal carrying the plurality of information carried by the electrical frequencies.

Abstract: A passband-flattened phasar including two free space regions coupled by a plurality of waveguides having predetermined differences between their lengths so as to act as an arrayed waveguide grating. The phasar is particularly useful in a wavelength-division multiplexed (WDM) optical communication system transmitting multiple wavelength systems arranged in a wavelength comb with a constant wavelength channel spacing. The input waveguide is coupled to the first free space region through a Mach-Zehnder interferometer (MZI) having two waveguide arms of differing lengths receiving approximately equal amounts of the input signal. The arms differ in lengths so as to produce a phase difference between them. In a WDM network, the waveguide arm produce a phase difference such that the free spectral range of the MZI equals the wavelength channel spacing, such that the wavelength response of the MZI is the same for each of the WDM wavelengths.

Abstract: An optical connector serves for connecting a light wave conductor end to a coupling partner. An end of a freely disposed plug pin insertable into a receiver of the coupling partner is received for coupling. The connector has at least two catch arms, which hold the connector to the coupling partner in a connected state. The catch arms extend out from a foot end of the plug pin in a direction toward a front side of the plug pin and run at least in sections along the plug pin. An optical connection is also provided.

Abstract: A wavelength division multiplexing device is disclosed. In one embodiment, the wavelength division multiplexing device comprises a crystalline collimating lens for collimating a plurality of monochromatic optical beams, a diffraction grating for combining the plurality of collimated, monochromatic optical beams into a multiplexed, polychromatic optical beam, and a crystalline focusing lens for focusing the multiplexed, polychromatic optical beam.

Abstract: A circuit carrier includes several layers of at least one insulating material and conductor structures located on or in the layers. At least one of the layers is an optical layer which is embedded on both sides in other layers. An optoelectronic component for a circuit carrier is also provided.

Abstract: The optical module product comprises an optical module and a sealing cap. The optical module comprises a ferrule, an optical fiber, an optical device, and an optical module assembly. The ferrule covers the side face of the optical fiber and has first and second end portions. The optical device is optically coupled with the optical fiber. The package has a surface from which one end portion of the ferrule projects, and encapsulates the optical device. The sealing cap comprises a sealing portion provided with a ferrule insertion hole having a contacting portion on the inner wall face thereof. The contacting portion comes into close contact with the side face of the ferrule to seal the projected end portion of the ferrule. In the state where the contacting portion seals the part of the ferrule including the second end portion, the sealing cap accommodates the ferrule projected from the package in the ferrule insertion hole.

Abstract: A massive parallel (MP) connector is provided which includes a fiber optic connector having a polymer female having multiple fibers mounted in V-grooves of the ferrule and beveled edges of the ferrule providing for alignment of the ferrule when the MP fiber optic connector is mated to a receptacle having an alignment assembly and an alignment member mounted within the alignment assembly to provide for precision alignment. A receptacle assembly is provided having a first receptacle half for receiving a fiber optic connector having a first form factor and a second receptacle half for receiving a fiber optic connector having a second form factor.

Abstract: A method for fabricating optical devices for transmission and/or manipulation of light includes steps of providing a substrate which defines a reference plane for positioning cladding material and core material, fixing rigid spacers to an upper surface of the substrate, the spacers having upper surfaces which define a second plane spaced above the reference plane, depositing a layer of a formable, curable under-cladding material over the upper surface of the substrate, the upper surface of the rigid spacers providing a guide for precise control of the height of the under-cladding material above the surface of the substrate, curing the under-cladding material under compression to form an under-cladding layer, and depositing a light guide core and over-cladding on the under-cladding. The method is susceptible to mass production and provides more precise control of the position of the light guide core relative to a substrate surface.

Abstract: An optical coupler for distributing light in a 360-degree pattern at a small angle is disclosed. The coupler comprises a solid rod with a first end region for receiving light and a second end region for distributing light. The rod tapers up in cross-sectional dimension between the first and second regions so as to decrease the angular distribution of light reflecting internally from the sides of tapered portions of the rod. An axis extends from the second end region towards the first end region. The second end region includes a generally conically shaped void pointing towards the first end region and defining a surface for deflecting light in a 360-degree pattern about the axis at a small angle compared to light entering into the first end region.

Abstract: The invention relates to a fibre optic routing board for routing a plurality of fibre optic cables. The fibre optic routing board is provided with one or more optical conductors disposed between a first lower laminate layer and a first upper laminate layer, the one or more optical conductors being connected to at least one of the optical fibres in the plurality of fibre optic cables, wherein at least one of the first lower laminate layer or the first upper laminate layer is so constructed that it attaches at least one of a jacket over a first. Advantageously, the fibre optic routing board additionally comprises a second laminate layer positioned between the first upper or lower laminate layer and the optical conductors. The use of a two layer laminate allows each of the laminate layers to have different properties.

Abstract: The invention relates to a fiber-optic connector (1) comprising a socket (2) and a plug (4) which are intended to be mated in order to join two optical cables. The connector according to the invention includes at least two sealing members, one of them being an interfacial sealing member (12) put under compression when the plug (4) and the socket (2) are being mated.

Abstract: Method of determining the axis of polarization of polarization-maintaining fibers, comprising: a) sending a polarized optical signal along a polarization fiber; b) emitting the polarized optical signal from one end of the fiber; c) inserting a polarizer between the fiber and an optical power; d) rotating the polarizer, and e) rotating the optical fiber.

Abstract: A microsphere-based analytic chemistry system and method for making the same is disclosed in which microspheres or particles carrying bioactive agents may be combined randomly or in ordered fashion and dispersed on a substrate to form an array while maintaining the ability to identify the location of bioactive agents and particles within the array using an optically interrogatable, optical signature encoding scheme. In a preferred embodiment, a modified fiber optic bundle or array is employed as a substrate to produce a high density array. The disclosed system and method have utility for detecting target analytes and screening large libraries of bioactive agents. In a preferred embodiment the methods include detecting a change in an optical property around a microsphere on an array.