Patents by Inventor Fahua Lan
Fahua Lan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10739604Abstract: 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.Type: GrantFiled: December 1, 2014Date of Patent: August 11, 2020Assignee: II-VI Delaware Inc.Inventors: Fan Chen, Maofeng Gu, Fahua Lan, Huiping Li
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Patent number: 9671611Abstract: 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.Type: GrantFiled: April 21, 2015Date of Patent: June 6, 2017Assignee: FINISAR CORPORATIONInventors: Fan Chen, Huiping Li, Jiangtao Zhang, Fahua Lan
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Publication number: 20150226963Abstract: 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.Type: ApplicationFiled: April 21, 2015Publication date: August 13, 2015Inventors: Fan Chen, Huiping Li, Jiangtao Zhang, Fahua Lan
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Patent number: 9097908Abstract: 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.Type: GrantFiled: December 1, 2014Date of Patent: August 4, 2015Assignee: FINISAR CORPORATIONInventors: Fan Chen, Maofeng Gu, Fahua Lan, Huiping Li
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Patent number: 9075233Abstract: 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.Type: GrantFiled: July 3, 2013Date of Patent: July 7, 2015Assignee: FINISAR CORPORATIONInventors: Fan Chen, Huiping Li, Jiangtao Zhang, Fahua Lan
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Publication number: 20150083314Abstract: 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.Type: ApplicationFiled: December 1, 2014Publication date: March 26, 2015Inventors: Fan CHEN, Maofeng GU, Fahua LAN, Huiping LI
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Publication number: 20150086156Abstract: 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.Type: ApplicationFiled: December 1, 2014Publication date: March 26, 2015Inventors: Fan CHEN, Maofeng GU, Fahua LAN, Huiping LI
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Patent number: 8903206Abstract: 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.Type: GrantFiled: November 8, 2010Date of Patent: December 2, 2014Assignee: Finisar CorporationInventors: Fan Chen, Maofeng Gu, Fahua Lan, Huiping Li
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Patent number: 8818193Abstract: 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.Type: GrantFiled: September 29, 2009Date of Patent: August 26, 2014Assignee: Finisar CorporationInventors: Fan Chen, Yongkang Hu, Zhenli Wen, Dongshen Han, Fahua Lan, Kevin Dapeng Zhang
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Patent number: 8792155Abstract: 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 (R1), second reflector (R2), first quarter waveplate (QWP1), second quarter waveplate (QWP2), 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 R1 may be positioned to receive and return a first output from CPBS. The QWP1 may be positioned between CPBS and R1. The R2 may be positioned to receive and return a second output from CPBS. The QWP2 may be positioned between CPBS and R2. 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.Type: GrantFiled: September 19, 2012Date of Patent: July 29, 2014Assignee: Finisar CorporationInventors: Huiping Li, Fan Chen, Xiaolin Chen, Fahua Lan
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Patent number: 8786937Abstract: 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.Type: GrantFiled: November 28, 2011Date of Patent: July 22, 2014Assignee: Finisar CorporationInventors: Fan Chen, Fahua Lan, Huiping Li, Kevin Dapeng Zhang
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Patent number: 8786938Abstract: 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.Type: GrantFiled: January 14, 2013Date of Patent: July 22, 2014Assignee: Finisar CorporationInventors: Huiping Li, Xiaolin Chen, Fan Chen, Fahua Lan
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Publication number: 20140133012Abstract: 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.Type: ApplicationFiled: January 14, 2013Publication date: May 15, 2014Applicant: FINISAR CORPORATIONInventors: Huiping LI, Xiaolin CHEN, Fan CHEN, Fahua LAN
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Publication number: 20140009813Abstract: 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.Type: ApplicationFiled: July 3, 2013Publication date: January 9, 2014Inventors: Fan Chen, Huiping Li, Jiangtao Zhang, Fahua Lan
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Publication number: 20130271822Abstract: 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 (R1), second reflector (R2), first quarter waveplate (QWP1), second quarter waveplate (QWP2), 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 R1 may be positioned to receive and return a first output from CPBS. The QWP1 may be positioned between CPBS and R1. The R2 may be positioned to receive and return a second output from CPBS. The QWP2 may be positioned between CPBS and R2. 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.Type: ApplicationFiled: September 19, 2012Publication date: October 17, 2013Applicant: FINISAR CORPORATIONInventors: Huiping LI, Fan CHEN, Xiaolin CHEN, Fahua LAN
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Patent number: 8433204Abstract: 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.Type: GrantFiled: December 23, 2010Date of Patent: April 30, 2013Assignee: Finisar CorporationInventors: Huiping Li, Xiaolin Chen, Fan Chen, Fahua Lan, Dapeng Kevin Zhang
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Publication number: 20120205521Abstract: 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.Type: ApplicationFiled: November 28, 2011Publication date: August 16, 2012Applicant: FINISAR CORPORATIONInventors: Fan CHEN, Fahua LAN, Huiping LI, Kevin Dapeng ZHANG
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Patent number: 8218915Abstract: 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.Type: GrantFiled: September 16, 2009Date of Patent: July 10, 2012Assignee: Finisar CorporationInventors: Zhenli Wen, Fan Chen, Fahua Lan, Kevin Dapeng Zhang
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Publication number: 20110194810Abstract: 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.Type: ApplicationFiled: November 8, 2010Publication date: August 11, 2011Applicant: FINISAR CORPORATIONInventors: Fan Chen, Maofeng Gu, Fahua Lan, Huiping Li
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Publication number: 20110188867Abstract: 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.Type: ApplicationFiled: December 23, 2010Publication date: August 4, 2011Applicant: FINISAR CORPORATIONInventors: Huiping Li, Xiaolin Chen, Fan Chen, Fahua Lan, Kevin Dapend Zhang