Xiaofeng Han

US Patent:

6704143, Mar 9, 2004

Filed:

Oct 23, 2000

Appl. No.:

09/694691

Inventors:

Xiaofeng Han - Allentown PA
Boying Barry Zhang - Lawrenceville NJ

Assignee:

ADC Telecommunications, Inc. - Eden Prairie MN

International Classification:

G02B 530

US Classification:

359499, 359494, 359495, 359496, 359497, 359837, 359498, 385 24

Abstract:

In a device and method, the optical path length through an optical element is adjustable with high precision. The optical element has a first segment formed from a first optical material, the first segment having a first face at a first end and a second face at a second end opposing the first face, the second face being non-parallel with the first. The first and second faces are disposed on a beam path. The element also includes a second segment formed from a second optical material, having a third face at a third end and a fourth face at a fourth end opposing the third face, the third face being non-parallel with the fourth face. At least one of the first and second segments is translatable across the beam path so as to change an optical path length through the optical element.

US Patent:

6826322, Nov 30, 2004

Filed:

Sep 4, 2001

Appl. No.:

09/946827

Inventors:

Xiaofeng Han - Allentown PA

Assignee:

Agility Communications, Inc. - Goleta CA

International Classification:

G02B 626

US Classification:

385 15, 385 33

Abstract:

Presented herein is an astigmatism correcting coupler. The couplet comprises a collimating lens, a focusing lens, and a power adjusting lens element. The power adjusting lens element may be positioned intermediate the collimating lens and focusing lens, or positioned after the focusing lens element.

US Patent:

6850659, Feb 1, 2005

Filed:

Jun 21, 2002

Appl. No.:

10/177231

Inventors:

Xiaofeng Han - Allentown PA, US

Assignee:

Agility Communicatioins, Inc. - Goleta CA

International Classification:

G02B 626

US Classification:

385 15, 385 33

Abstract:

An astigmatism-correcting coupler includes a collimating lens for collimating a beam of coherent light output from a laser, a power adjusting lens for reducing any astigmatism of the collimated beam of coherent light output, and a focusing lens for focusing the collimated beam of coherent light output into an optical fiber. The focusing lens is a graded-index (GRIN) focusing lens that is cylindrically polished to have different focal powers in lateral and transverse planes. The cylindrical polished GRIN focusing lens corrects for astigmatic effects by adjusting the power of the light output on the transverse and lateral planes.

US Patent:

6992777, Jan 31, 2006

Filed:

Nov 13, 2001

Appl. No.:

10/010646

Inventors:

Xiaofeng Han - Allentown PA, US
Boying Barry Zhang - Lawrenceville NJ, US
Zhicheng Yang - Burnsville MN, US

Assignee:

ADC Telecommunications, Inc. - Eden Prairie MN

International Classification:

G01B 9/02

US Classification:

356491, 356517, 356453

Abstract:

An interferometer uses birefringent elements for splitting and combining beams of orthogonal polarization, and for changing the relative phase between the orthogonally polarized beams. A polarization sensitive detector is used to detect a fringe pattern whose periodicity is dependent on the relative optical paths traversed by the orthogonally polarized beams. In an embodiment of the invention, a birefringent beam splitter has an input path and first and second output paths. A birefringent beam combiner has first and second input paths and an output path, the first and second input paths of the birefringent beam combiner aligned respectively with the first and second output paths of the birefringent beam splitter. A polarization sensitive detector is disposed on the output path of the birefringent beam combiner to detect the periodicity of the fringe pattern.

US Patent:

20190391348, Dec 26, 2019

Filed:

Feb 19, 2019

Appl. No.:

16/279874

Inventors:

- Sunnyvale CA, US
Jiaming Zhang - Macunge PA, US
Xiaofeng Han - Allentown PA, US
Timothy Butrie - Hellertown PA, US
Fred Kish, JR. - Palo Alto CA, US

Assignee:

Infinera Corporation - Palo Alto CA

International Classification:

G02B 6/42
H04B 10/40

Abstract:

An optical transceiver package comprising a transceiver module, a digital signal processor (DSP), a substrate supporting the transceiver module and the DSP, and a barrier to mechanically protect and thermally insulate the transceiver module. The substrate comprises a material having a coefficient of thermal expansion (CTE) of 2.3-14 ppm/ C. and the barrier comprises a material having a CTE of 3.5-14 ppm/ C.

US Patent:

20190158183, May 23, 2019

Filed:

Jan 7, 2019

Appl. No.:

16/241625

Inventors:

- Sunnyvale CA, US
Michael Reffle - Center Valley PA, US
Xiaofeng Han - Allentown PA, US
Mehrdad Ziari - Pleasanton CA, US
Vikrant Lal - Sunnyvale CA, US
Peter W. Evans - Mountain House CA, US
Donald J. Pavinski - West Pittston PA, US
Jie Tang - Fogelsville PA, US
David Coult - Oley PA, US

International Classification:

H04B 10/40
H04B 10/50
H04J 14/06
G02B 6/42

Abstract:

A device may include a substrate. The device may include a carrier mounted to the substrate. The device may include a transmitter photonic integrated circuit (PIC) mounted on the carrier. The transmitter PIC may include a plurality of lasers that generate an optical signal when a voltage or current is applied to one of the plurality of lasers. The device may include a first microelectromechanical structure (MEMS) mounted to the substrate. The first MEMS may include a first set of lenses. The device may include a planar lightwave circuit (PLC) mounted to the substrate. The PLC may be optically coupled to the plurality of lasers by the first set of lenses of the first MEMS. The device may include a second MEMS, mounted to the substrate, that may include a second set of lenses, which may be configured to optically couple the PLC to an optical fiber.

US Patent:

20190089475, Mar 21, 2019

Filed:

Nov 15, 2018

Appl. No.:

16/191974

Inventors:

- Annapolis Junction MD, US
Michael Reffle - Center Valley PA, US
Jeffrey T. Rahn - Sunnyvale CA, US
John Osenbach - Kutztown PA, US
Timothy Butrie - Hellertown PA, US
Xiaofeng Han - Allentown PA, US
Mark Missey - San Jose CA, US
Mehrdad Ziari - Pleasanton CA, US
Peter W. Evans - Mountain House CA, US

International Classification:

H04J 14/02
H04B 10/50
H04B 10/079

Abstract:

Consistent with the present disclosure, a photonic integrated circuit (PIC) is provided that has 2 N channels (N being an integer). The PIC is optically coupled to N optical fibers, such that each of N polarization multiplexed optical signals are transmitted over a respective one of the N optical fibers. In another example, each of the N optical fibers supply a respective one of N polarization multiplexed optical signals to the PIC for coherent detection and processing. A multiplexer and demultiplexer may be omitted from the PIC, such that the optical signals are not combined on the PIC. As a result, the transmitted and received optical signals incur less loss and amplified spontaneous emission (ASE) noise. In addition, optical taps may be more readily employed on the PIC to measure outputs of the lasers, such as widely tunable lasers (WTLs), without crossing waveguides.

US Patent:

20190089476, Mar 21, 2019

Filed:

Nov 15, 2018

Appl. No.:

16/192032

Inventors:

- Annapolis Junction MD, US
Michael Reffle - Center Valley PA, US
Jeffrey T. Rahn - Sunnyvale CA, US
John Osenbach - Kutztown PA, US
Timothy Butrie - Hellertown PA, US
Xiaofeng Han - Allentown PA, US
Mark Missey - San Jose CA, US
Mehrdad Ziari - Pleasanton CA, US
Peter w. Evans - Mountain House CA, US

International Classification:

H04J 14/02
H04B 10/50
H04B 10/079

Abstract:

Consistent with the present disclosure, a photonic integrated circuit (PIC) is provided that has 2 N channels (N being an integer). The PIC is optically coupled to N optical fibers, such that each of N polarization multiplexed optical signals are transmitted over a respective one of the N optical fibers. In another example, each of the N optical fibers supply a respective one of N polarization multiplexed optical signals to the PIC for coherent detection and processing. A multiplexer and demultiplexer may be omitted from the PIC, such that the optical signals are not combined on the PIC. As a result, the transmitted and received optical signals incur less loss and amplified spontaneous emission (ASE) noise. In addition, optical taps may be more readily employed on the PIC to measure outputs of the lasers, such as widely tunable lasers (WTLs), without crossing waveguides.