Abstract: A multi-fiber, fiber optic connector may include a reversible keying arrangement for determining the orientation for plugging the connector into an adapter to thereby allow for a change in polarity of the connection to be made on site. The connector housing may be configured to engage with a removable key that may be engaged with the housing in at least two different locations to provide the plug-in orientation, or the housing may have slidably displaceable keys movable between multiple positions on the housing.

Abstract: An optical package comprising an optical die that is electrically coupled to a package substrate, and an optical interconnect adjacent the optical die. The optical interconnect comprises a first polarizing filter adjacent to a first lens, a second polarizing filter adjacent to a second lens; and a film comprising a magnetic material between the first polarizing filter and the second polarizing filter. The second polarizing filter is rotated with respect to the first polarizing filter and the magnetic material is to rotate a polarization vector of light incoming to the optical interconnect. An optical fiber interface port is immediately adjacent to the first lens. The second lens is immediately adjacent to an optical interface of the optical die.

Abstract: Disclosed is an optical module, including a lower housing, an upper housing covering the lower housing, a circuit board, a first metal base, a second metal base, a silicon photonic chip, and a light emission module including a laser chip and an optical path assembly. The first metal base is disposed on one side of the upper housing. The second metal base is disposed on one side of the lower housing. The circuit board with a hollow region is disposed on the second metal base. The silicon photonic chip is disposed on the second metal base exposed from the hollow region. The laser chip is disposed on the first metal base. The optical path assembly is disposed on the first metal base and/or on the second metal base exposed from the hollow region, and guides a third optical signal emitted by the laser chip to the silicon photonic chip.

Abstract: An optical multiplexing and demultiplexing method of the present disclosure includes arranging, face to face, a polished surface of a coated optical fiber whose side surface is polished to a core or a vicinity of the core and a polished surface of an optical waveguide whose propagation constant varies in a longitudinal direction and whose side surface is polished to a core or a vicinity of the core, and aligning the polished surface of the coated optical fiber and the polished surface of the optical waveguide so that desired branching ratio is obtained from one end of the coated optical fiber to the end, distal to the former end, of the optical waveguide by relatively moving the polished surface of the coated optical fiber and the polished surface of the optical waveguide.

Abstract: An optical modulator includes a Mach-Zehnder interferometer including (i) a first optical waveguide including a first semiconductor junction diode, and (ii) a second optical waveguide including a second semiconductor junction diode. A semiconductor region connects the first and second semiconductor junction diodes such that a distance between the first and second optical waveguides is less than 2.0 ?m for at least a portion of a longitudinal direction of the optical modulator. In another aspect, a method of modulating an optical signal includes splitting input light into first and second optical transmission paths; modulating a phase difference between light in the first optical transmission path and light in the second optical transmission path without applying a bias voltage through an impedance less than 100 ohm between the first and second optical transmission paths; and combining light that is output from the first and second optical transmission paths.

Abstract: Disclosed is a nanoimprintable resin for use in optical waveguide applications. The nanoimprintable resin includes a base resin, metal oxide nanoparticles, and a photoinitiator. A cured film of the nanoimprintable resin exhibits a refractive index greater than or equal to 1.8 (589 nm), such as 1.9 (599 nm), according to ASTM D1218-21 at 25° C.

Abstract: An optical beam scanning semiconductor device includes 1×N electrically controlled, integrated optical switch matrix and specifically designed integrated optical grating output couplers at each of N output waveguides of 1×N switch. By selecting one of the N outputs of the 1×N switch as the output of the input optical signal, an optical output beam scans in free space. Variation in the grating output coupler design enables a smart scanning device with multiple controllable beam characteristics.

Abstract: In one embodiment, an apparatus includes an upper cold plate and a lower cold plate, at least one of the upper cold plate or the lower cold plate comprising an electrical or optical path extending therethrough, a substrate and die package interposed between the upper cold plate or the lower cold plate, and a connector coupled to one of the upper cold plate or the lower cold plate for transmitting power or an optical signal through the electrical or optical path to the substrate and die package.

Abstract: A method of making a photonic integrated circuit (PIC) is provided. The method comprises depositing a functional resist material layer over a substrate, disposing and pressing a stamp with a plurality of nanopatterns into the functional resist material for a period of time, and removing the stamp from the functional resist material to provide nanofeatures that are inverted versions of the nanopatterns, wherein the nanofeatures form one or more optical elements.

Abstract: An integrated on-chip polarization rotator splitter (26) comprises a waveguide polarization rotator (54) having a first and a second layer (62) that form a rib waveguide (66) together and are both made of silicon nitride. The first layer (62) has a first, a second and a third section. The first layer (64) has a first width (w1) that increases in the first section (S1), is constant in the second section (S1) and decreases in the third section (S3). The second layer (64) has a second width (w2) that continuously increases. The polarization rotator splitter (26) further includes a waveguide polarization splitter (61) comprising a first strip waveguide (71) and a second strip waveguide (72) that are separated by a gap (74). The first and second strip waveguides (71, 72) are also made of silicon nitride. The first and second strip waveguide (71, 72) form an asymmetric evanescent direction coupler.

Abstract: An optical scan device includes an optical waveguide array, including a plurality of optical waveguides each of which propagates light along a first direction, that emits a light beam, the plurality of optical waveguides being arranged in a second direction that intersects the first direction, a phase shifter array including a plurality of phase shifters connected separately to each of the plurality of optical waveguides, a control circuit that controls a phase shift amount of each of the plurality of phase shifters and/or inputting of light to each of the plurality of phase shifters and thereby controls a direction and shape of the light beam that is emitted from the optical waveguide array, a photodetector that detects the light beam reflected by a physical object, and a signal processing circuit that generates distance distribution data on the basis of output from the photodetector.

Abstract: Disclosed is a coherent optical combining photonic integrated circuit that can detect and align light amplified by a scalable quantity of semiconductor optical amplifiers (SOAs). The light can be split into beams and amplified by individual SOAs in a PIC and combined via couplers in the PIC. The combined light can be measured using a photodetector and the light beams can be adjusted based the photodetector measurement to coherently combine the light to achieve high optical power from the photonic integrated circuit.

Abstract: An optical device including a waveguide, electrodes, and a connecting dielectric is described. The waveguide includes an electro-optic material having a waveguide optical refractive index and a waveguide microwave dielectric constant. The electrodes include a first electrode and a second electrode. The waveguide is between the first electrode and the second electrode. At least a portion of the connecting dielectric is between the waveguide and electrodes. The connecting dielectric has a microwave dielectric constant greater than the waveguide microwave dielectric constant.

Abstract: An optical waveguide (100) is disclosed, for guiding light in a photonic circuit comprising a layer of phase change material (101) for modulating the phase of the guided light. The phase change material (101) is switchable between at least a stable crystalline state and a stable amorphous state each with different refractive indexes. The phase change material (101) exhibits an extinction coefficient of less than 0.1 in both states for wavelengths greater than 1000 nm.

Abstract: An optical connector including: a plug housing having a pin cavity; a pin disposed at least partially in the pin cavity of the plug housing, the pin comprising at least a pin sleeve; a receptacle housing having a socket cavity; a socket disposed at least partially in the socket cavity, the socket comprising at least a socket sleeve; and an alignment sleeve between said pin and socket, wherein the plug housing, the pin, the pin sleeve, the pin ferrule, the receptacle housing, the socket, the socket sleeve, the socket ferrule, and the alignment sleeve: (i) magnetic permeability that is less than 1.0 B/H, where B is magnetic flux density and H is magnetic flux, and (ii) are configured to perform at least 100,000 mating cycles.

Abstract: A microstructured optical fiber sensor for sensing changes in a physical characteristic up to a predetermined temperature is disclosed. The sensor includes a microstructured optical fiber and a fiber Bragg grating formed in the microstructured optical fiber by generating a periodic modulation in the refractive index along a core region of the suspended core. The fiber Bragg grating is configured to produce a band reflection spectra including a fundamental mode and a plurality of higher order modes whose respective wavelengths vary in accordance with changes in the physical characteristic at the core region of the microstructured optical fiber. The microstructured optical fiber is configured to increase the confinement loss of the plurality of higher order modes of the band reflection spectra relative to the fundamental mode.

Abstract: The present disclosure provides a MEMS -based variable optical attenuator (VOA) array, sequentially including an optical fiber array, a micro-lens array, and a MEMS-based micro-reflector array to form a VOA array having several optical attenuation units. The MEMS-based micro-reflectors can change the propagation direction of a beam, causing a misalignment coupling loss to the beam and thereby achieving optical attenuation, with a broad range of dynamic attenuation, low polarization dependent loss and wavelength dependent loss, good repeatability, short response time (at the millisecond level), etc. Arrayed device elements are used as assembly units of the present disclosure, and the assembly of arrayed elements facilitates tuning in batches. Accordingly, automation levels are improved, and the production costs are reduced.

Abstract: An optical ring modulator for use as a PAM-N modulator, the optical ring modulator comprising: a first optical waveguide which forms a bus waveguide; a ring waveguide optically coupled to the bus waveguide; wherein, the ring waveguide comprises: a first electrode region having a first pn junction or first Moscap, the first pn junction or first Moscap configured to generate a first phase shift upon application of a given voltage across the first pn junction or first Moscap; and a second electrode region having a second pn junction or second Moscap, the second pn junction or second Moscap configured to generate a second phase shift when the given voltage is applied across the second pn junction or second Moscap, wherein the second phase shift is less than the first phase shift.

Abstract: A silicon photonic integrated chip and a wavelength division multiplexer that includes at least two polarization control structures and at least one polarization-independent Mach-Zehnder interferometer on a silicon substrate are provided. The polarization control structure includes two input ports and one output port. The Mach-Zehnder interferometer includes two input ports and one optical signal output port for outputting a multiplexed optical signal. The output ports of the polarization control structures are connected to the input ports of the Mach-Zehnder interferometer. The polarization control structures have large bandwidths for increasing an optical bandwidth of the wavelength division multiplexer and reducing an optical loss. A quantity of phase shift arms that require tuning feedback is reduced to lower overall power consumption of the wavelength division multiplexer.

Abstract: An optical phased array (OPA) radiator includes a plurality of unit radiators configured to serve as optical waveguides, each of the unit radiators being made of a silicon material and each having a predetermined length, where the unit radiators are disposed in parallel; a cladding portion configured to cover the plurality of unit radiators; and a plurality of electrodes arranged in parallel with the plurality of unit radiators on the cladding portion, where the plurality of electrodes are arranged so as not to overlap the plurality of unit radiators in a vertical direction. A beam radiated through the unit radiators using a phased array can be efficiently vertically steered.