Yu U Zheng

US Patent:

6347170, Feb 12, 2002

Filed:

May 6, 1999

Appl. No.:

09/306373

Inventors:

Yu Zheng - Sunnyvale CA

Assignee:

JDS Uniphase, Inc. - Ontario

International Classification:

G02B 632

US Classification:

385 34, 385 16, 385 74

Abstract:

The present invention discloses an improved wavelength division multiplexed (WDM) coupler. The WDM coupler includes a WDM filter attached to a first GRIN lens by applying a first heat-curing epoxy. The WDM coupler further includes the first GRIN lens inserted and fixed into a first holding tube by applying a second heat-curing epoxy. The WDM coupler further includes a second holding tube holding a dual fiber pigtail. The dual fiber pigtail is disposed at a first optimal position from the first GRIN lens to achieve a lowest reflection loss with the first and second holding tubes being in contact with each other. The dual fiber pigtail and the first and second holding tubes are fixed together by applying a third heat-curing epoxy. The WDM coupler further includes a second GRIN lens inserted and fixed into a third holding tube by applying a fourth heat-curing epoxy. The WDM coupler further includes a fourth holding tube holding a standard single fiber pigtail.

US Patent:

6485190, Nov 26, 2002

Filed:

May 18, 1999

Appl. No.:

09/315364

Inventors:

Yu Zheng - Sunnyvale CA

Assignee:

JDS Uniphase Inc. - Ontario

International Classification:

G02B 638

US Classification:

385 61, 385 51, 385 52, 385139, 385147

Abstract:

The present invention discloses an improved in-line micro-optic component. The in-line micro-optic component includes an optical core attached to a first optical collimator by applying a first heat-curing epoxy. The in-line micro-optic component further includes a first gold-plated stainless steel holder holding the first optical collimator. The first optical collimator is inserted and fixed in the first stainless steel holder by applying a second heat-curing epoxy. The inline micro-optic component coupler further includes a second optical collimator. The in-line micro-optic component coupler further includes a second gold-plated stainless steel holder holding the second optical collimator. The second optical collimator is inserted and fixed in the second stainless steel holder by applying a third heat-curing epoxy. After the optical alignment between the first optical collimator with the optical core and the second optical collimator is done to achieve a lowest transmission loss, the first and the second stainless steel holders are soldered together.

US Patent:

7487488, Feb 3, 2009

Filed:

Oct 6, 2006

Appl. No.:

11/544105

Inventors:

Dajen Huang - Sunnyvale CA, US
Yi Wu - Santa Clara CA, US
Arjun Dutt - Santa Clara CA, US
Yu L. Zheng - Fremont CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G06F 17/50

US Classification:

716 14, 716 10

Abstract:

A mechanism is disclosed for assigning repeaters to signal paths in an integrated circuit design. The mechanism involves reserving, in a first metal layer of the integrated circuit design, metal tracks for routing signals. Access points to a plurality of repeaters are reserved in a second metal layer of the integrated circuit design. Each access point is associated with a particular repeater. The design may have other layers between the second metal layer and a region reserved for the repeaters. The number of repeaters may be based on the number of metal tracks that are available to route signals through the first region. Signal paths are assigned routes that comprise at least a portion of one or more of the metal tracks. A route from signal paths requiring a repeater to access points to a particular repeater is determined. Thus, the signal paths are assigned to a repeater.

US Patent:

8153358, Apr 10, 2012

Filed:

Feb 22, 2008

Appl. No.:

12/035872

Inventors:

Yu Zheng - Melrose MA, US
Richard J. Roberts - Wenham MA, US

Assignee:

New England Biolabs, Inc. - Ipswich MA

International Classification:

C12Q 1/00
C12Q 1/68
C12P 21/06

US Classification:

435 4, 435 61, 435 691

Abstract:

Compositions and methods are provided for selection and enrichment of a target gene from a library of polynucleotide sequences such as might be formed from a genome or by random mutagenesis of a genetic sequence. The selection and enrichment occurs in aqueous droplets formed in an emulsion that compartmentalize individual polynucleotides from the library or a plurality of polynucleotides that may include polynucleotides not derived from the library, transcription and translation reagents and optionally additional chemical and enzyme reagents. The selection and enrichment method utilizes a polynucleotide adaptor which when ligated to the polynucleotide fragment enables amplification to occur in the presence of an adaptor specific primer.

US Patent:

8551734, Oct 8, 2013

Filed:

Mar 8, 2012

Appl. No.:

13/415504

Inventors:

Yu Zheng - Topsfield MA, US
Richard J. Roberts - Wenham MA, US

International Classification:

C12P 21/06
C12Q 1/68
G01N 33/573
C12P 19/34
C12N 9/00

US Classification:

435 691, 435 74, 435 618, 435 612, 435 911, 435 912, 435 915, 435 9152, 435183

Abstract:

Compositions and methods are provided for selection and enrichment of a target gene from a library of polynucleotide sequences such as might be formed from a genome or by random mutagenesis of a genetic sequence. The selection and enrichment occurs in aqueous droplets formed in an emulsion that compartmentalize individual polynucleotides from the library or a plurality of polynucleotides that may include polynucleotides not derived from the library, transcription and translation reagents and optionally additional chemical and enzyme reagents. The selection and enrichment method utilizes a polynucleotide adaptor which when ligated to the polynucleotide fragment enables amplification to occur in the presence of an adaptor specific primer.

US Patent:

20030103540, Jun 5, 2003

Filed:

Dec 5, 2001

Appl. No.:

10/010988

Inventors:

Yu Zheng - Cupertino CA, US

International Classification:

H01S005/10

US Classification:

372/092000

Abstract:

A new low-cost Fabry-Perot (FP) laser with narrow spectral width and low sensitivity to reflections and temperature variation is disclosed in this invention. The new FP laser includes a mirror, a laser gain medium, and a partial wavelength mirror. The partial wavelength mirror has a low-cost reflective wavelength filter coating on it. The reflective wavelength filter has a narrow reflective passband width, i.e., less than 2 nm at FWHM, and a peak reflectivity of around 30% with an isolation of over 25 dB outside the reflective passband. Also the reflective wavelength filter has low wavelength thermal dependence of 0.01 nm/C or less.

US Patent:

20030103541, Jun 5, 2003

Filed:

Mar 11, 2002

Appl. No.:

10/095949

Inventors:

Yu Zheng - Cupertino CA, US

International Classification:

H01S003/08

US Classification:

372/092000

Abstract:

An improved low-cost Fabry-Perot (FP) laser with narrow spectral width and low sensitivity to reflections and temperature variation is disclosed in this invention. The improved FP laser includes a mirror, a laser gain medium (chip), an anti-reflection coating, and a wavelength mirror. The laser chip has the mirror on its non-light emitting facet and the anti-reflection coating on its light emitting facet. The wavelength mirror is coated on a glass substrate. Both the laser chip and the wavelength mirror are fixed onto a submount. The wavelength mirror has a low-cost reflective wavelength filter coating on it. The reflective wavelength filter has a narrow reflective passband width, i.e., less than 2 nm at FWHM, and a peak reflectivity of around 30% with an isolation of over 25 dB outside the reflective passband. Also the reflective wavelength filter has low wavelength thermal dependence of 0.01 nm/C or less.

US Patent:

20030214714, Nov 20, 2003

Filed:

May 14, 2002

Appl. No.:

10/144954

Inventors:

Yu Zheng - Cupertino CA, US

International Classification:

G02B005/30
G02B027/28
H01S003/00

US Classification:

359/484000, 359/494000, 359/495000, 359/497000, 372/703000

Abstract:

A new low-cost free-space optical isolator is disclosed in this invention. The new free-space optical isolator includes an input polarizer, a Faraday rotator, an output polarizer, and a magnetic tube. By employing the recently developed subwavelength optical elements (SOEs) technology, the input polarizer is directly manufactured on the left surface of the Faraday rotator and the output polarizer is directly manufactured on the right surface of the Faraday rotator. Relative to the polarization axis of the input polarizer, the polarization axis of the output polarizer is 45 degrees clockwise from left to right.