Finisar Corporation

Ii-vi Delaware, Inc.

Fahua Lan

Fan Chen

Huiping Li

Kevin Dapeng Zhang

Zhenli Wen

Xiaolin Chen

Maofeng Gu

Jiangtao Zhang

Dongsheng Han

Dongshen Han

Kang Lin

Dapeng Kevin Zhang

Guojun Lai

Yongkang Hu

Youjian Wu

Xingang Jin

Junfei Zhang

A reinforced multi-body optical device that in one embodiment includes a multi-body optical device having a thickness that is less than or equal to about 1.0 millimeter and a supporting plate bonded without epoxy to the multi-body optical device. In an embodiment the supporting plate has a coefficient of thermal expansion (CTE) that is within about 0.5 parts per million of the CTE of the multi-body optical device.

Reinforced multi-body optical devices

An optical cell may include a first port coupled to a second port by an optical path. The optical cell may also include a compensator disposed in the optical path. The compensator may be rotatable about an axis. Rotating the compensator about the axis may vary a distance that the optical path passes through the compensator thereby changing the optical path length of the optical path.

Optical cell with wavelength compensator

Disclosed in one example embodiment is a method for fabricating a reinforced multi-body optical device. One method involves applying a coating to sides of an interior plate and bonding two plates to either side of the interior plate. The bonded plates are diced at an angle that is not orthogonal to the bonded plates. The top and bottom portions of a diced section are removed to form a multi-body polarization beam splitter (PBS) having a generally rectangular perimeter. A supporting plate is bonded to the multi-body PBS to form a reinforced multi-body PBS, wherein the supporting plate has a CTE that is within about 0.5 parts per million of the CTE of the multi-body PBS. The multi-body PBS is grinded to reduce the thickness of the multi-body PBS.

Reinforced multi-body optical devices. In one example embodiment, a method for fabricating a reinforced multi-body optical device includes various acts. First, a supporting plate is bonded, using pressure and heat, to a multi-body optical device to form a reinforced multi-body optical device. The supporting plate has a coefficient of thermal expansion (CTE) that is within about 0.5 parts per million of the CTE of the multi-body optical device. Then, the multi-body optical device is ground to reduce the thickness of the multi-body optical device.

An embodiment of the invention includes a tunable optical dispersion compensator (TODC) comprising a first beam displacer on an optical path, wherein the first beam displacer separates an optical signal into a first beam and a second beam, and one or more polarizing beam splitters on the optical path, wherein the one or more polarizing beam splitters keep the first beam and the second beam on the optical path. The TODC also comprises one or more etalons on the optical path, wherein the one or more etalons are tunable to introduce a group delay in the first beam and the second beam, and a reflecting mirror on the optical path, wherein the reflecting mirror returns the optical signal back along the optical path. The TODC further comprises a second beam displacer, wherein the second beam displacer combines the first beam and the second beam into an output optical signal.

Multichannel tunable optical dispersion compensator

In some example embodiments, a demodulator may include an input polarization beam splitter (IPBS), input half waveplate (IHWP), cubical polarization beam splitter (CPBS), first reflector (R), second reflector (R), first quarter waveplate (QWP), second quarter waveplate (QWP), beam displacer (BD), output half waveplate (OHWP), and output polarization beam splitter (OPBS). The CPBS may be positioned to receive an output from IPBS. The IHWP may be positioned between IPBS and CPBS. The Rmay be positioned to receive and return a first output from CPBS. The QWPmay be positioned between CPBS and R. The Rmay be positioned to receive and return a second output from CPBS. The QWPmay be positioned between CPBS and R. The BD may be positioned to receive a third output from CPBS. The OPBS may be positioned to receive an output from BD. The OHWP may be positioned between BD and OPBS.

Athermal DQPSK and/or DPSK demodulator

In an embodiment, a demodulator includes first, second, third, fourth and fifth beam displacers, a half waveplate, and a quarter waveplate. The second beam displacer is positioned to receive an output from the first beam displacer. The third beam displacer is positioned to receive an output from the second beam displacer. The half waveplate is positioned to receive an output from the third beam displacer. The fourth beam displacer is positioned to receive an output from the half waveplate. The fifth beam displacer is positioned to receive an output from the fourth beam displacer. The quarter waveplate is positioned between the fourth beam displacer and the fifth beam displacer.

DP-QPSK demodulator

In an embodiment, a DP-QPSK demodulator includes first, second and third polarization beam splitters ('PBSs') and first, second and third half waveplates ('HWPs'). The first HWP is positioned to receive an output of the first PBS. The second PBS is positioned to receive an output of the first HWP. The second HWP is positioned to receive an output of the second PBS. The third PBS is positioned to receive an output of the second HWP. The third HWP is positioned to receive an output of the third PBS.

Dual-polarization QPSK demodulator

A phase shift keyed demodulator includes first and second beam splitters, a first optical path, a second optical path, and a wavelength tuner. The first beam splitter splits an input signal into first and second output signals. The second beam splitter splits each first and second output signal into a transmitted signal and a reflected signal. The first optical path includes an optical path of each transmitted signal from a beam splitting surface to a reflector and back to the beam splitting surface. The second optical path includes an optical path of each reflected signal from the beam splitting surface to a mirror surface and back to the beam splitting surface. A path difference introduces a delay between the transmitted signal and the reflected signal. The wavelength tuner tunes the demodulator to a predetermined central wavelength and introduces a phase shift between first and second transmitted signals.

DQPSK demodulator

Asymmetrical interleavers and deinterleavers. In one example embodiment, an asymmetrical deinterleaver includes first, second, third, fourth, and fifth filter cells interleaved with first, second, third, and fourth waveplates and followed by a fifth waveplate. The filter cells are configured to filter optical signals propagating on first and second legs of an optical loop. The asymmetrical deinterleaver also includes a retro reflector optically coupled with the filter cells and waveplates. The retro reflector is configured to reflect the optical signals between the first leg and the second leg to form the optical loop. The asymmetrical deinterleaver further includes a single-fiber collimator optically coupled to the first leg of the optical loop and a dual-fiber collimator optically coupled to the second leg of the optical loop.

Asymmetrical interleaver and deinterleaver

An apparatus for use in an optical transceiver module that incorporates an integrated multiplexer/demultiplexer for high speed data transfer applications. One example embodiment includes a transmissive block arranged to interface with a transmit optical port, a receive optical port, and a plurality of optical subassemblies. The transmit optical port may transmit a first multiplexed optical signal and the receive optical port may receive a second multiplexed optical signal. Filters may be positioned between the transmissive block and one or more of the optical subassemblies to transmit signals at predetermined wavelengths while reflecting other signals incident thereon.

Integrated multiplexer/demultiplexer having offset transmitters and receivers for use in an optical transceiver module

A glass optical reflective tap is described that optically connects two optical fibers and may tap a portion of the light that is being communicated between the optical fibers. In one embodiment of the invention, the optical filter includes two D-lenses that operate as focusing or collimator lenses. The first D-lens focuses an optical signal onto a tap filter that allows a majority of the light within an optical signal to pass and also reflects a small portion of optical signal light to a reflective port. The second D-lens focuses the passed light into a transmission port of an optical fiber.

Multimode reflective tap

Spatially-efficient optical multiplexers and optical demultiplexers include elements interrelating along orthogonal axes. A transmission block of extreme thinness has highly reflective coatings on opposed parallel surfaces. Lasers of multiplexer are on one side of transmission block with transmission axes perpendicular to transmission block surface. An associated multiplexed signal transmitting port on opposite side of transmission block has receiving axis parallel to transmission block surface on that side. Detectors of demultiplexer are on one side of transmission block with reception axes perpendicular to transmission block surface. An associated multiplexed signal receiving port on opposite side of transmission block has receiving axis parallel to transmission block surface on that side. A unitary structure performs both optical multiplexer functions and optical demultiplexer function with a single thin transmission block. Related optical signal processing methods are included.

Compact optical multiplexer and demultiplexer

A glass optical filter is described that optically connects two optical fibers and may filter a single or group of channels from a WDM signal that is being communicated between the optical fibers. The glass optical filter may be comprised of two pigtail tubes having smaller interior diameters than a center piece tube that couples the two pigtail tubes together. In one embodiment of the invention, D-lenses are positioned within the glass optical filter and function as focusing lenses. The characteristics of the glass housing and D-lens provide a preferred environment for aligning optical fiber pigtails to the focusing lenses.

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Shanghai, China

Fahua Lan