Qi I Wu

US Patent:

6356681, Mar 12, 2002

Filed:

Jul 9, 1999

Appl. No.:

09/350750

Inventors:

Gang Chen - Horseheads NY
Qi Wu - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 634

US Classification:

385 37, 385 10, 385 24, 385123, 385140, 372102, 359130

Abstract:

The method and apparatus of the present invention achieves the trimming and, therefore, tuning of fiber optic devices by, in on embodiment, precisely heating a small area of a fiber to allow its elongation when mounted under tension in its package. By pulsing a source of heat in precise amounts, the elongation can be precisely controlled within 1 picometer precision over a tuning range of about 200 picometers. In another embodiment with fibers having core dopants which can be diffused, the optical length of an optical fiber can be trimmed with nanometer precision. By employing a controlled source of localized energy applied to the optical fiber, real time trimming can be achieved in both systems by injecting a broad band source of energy at the input of the device and coupling a spectral analyzer at its output to monitor the frequency characteristic of the optical device during trimming. In a preferred embodiment, the energy source comprised a CO laser having a relatively narrow beam corresponding to the diameter of the optical fiber. Energy from the laser is directed to a small area of the optical fiber in pulses which provide precise control of the trimming process.

US Patent:

6370286, Apr 9, 2002

Filed:

Jul 16, 1999

Appl. No.:

09/356217

Inventors:

Mark F. Krol - Painted Post NY
Qi Wu - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

G02B 600

US Classification:

385 11, 385 24, 359484, 359494

Abstract:

A polarization-interferometry based tunable periodic filter includes polarization defining components such as polarizing beam splitters or polarizing beam displacers located on the input and output sides of a phase retarder such as a birefringent crystal. A polarization independent input consisting of multiple optical channels having a periodic frequency spacing is converted to a branched output of optical channels in which each branch has a periodic frequency spacing that is different from that of the input, and which are interleaved with each other. The output period is tunable by adjusting the phase delay of orthogonal polarization components. A contrast ratio of 20 dB can be realized. The device allows the mux/demux of up to 200 WDM channels with a 50 GHz frequency spacing. Applications of the device include a band splitter, a wavelength selective cross-connect, and a wavelength monitor.

US Patent:

6445493, Sep 3, 2002

Filed:

Oct 25, 1999

Appl. No.:

09/426051

Inventors:

Glenn E. Kohnke - Painted Post NY
Qi Wu - Painted Post NY

Assignee:

Corning Incorporated - Corning NY

International Classification:

H01S 300

US Classification:

3593371, 3593411, 359161, 3593372

Abstract:

Compound gain flattening filters of optical amplification include a series of filter components with spectral responses that are combined to approach a target loss spectrum. Small variations in the central wavelengths of the component responses can produce large errors in the combined response of the compound gain flattening filter. However, the components can be divided into sub-components with balanced central wavelength deviations to achieve the desired response goals despite exhibiting otherwise detrimental wavelength deviations.

US Patent:

6735365, May 11, 2004

Filed:

Apr 16, 2002

Appl. No.:

10/124624

Inventors:

Joel P. Carberry - Horseheads NY
Qi Wu - Eatontown NJ

Assignee:

Corning, Incorporated - Corning NY

International Classification:

G02B 626

US Classification:

385 39, 385 43, 385 48

Abstract:

In accordance with an exemplary embodiment of the present invention, an optical interleaver/deinterleaver includes a substrate having at least one window therein. The interleaver/deinterleaver further includes a first optical waveguide and a second optical fiber, which are disposed over a substrate. The first and second optical waveguides are coupled together at at least two locations to form optical couplers at each of the locations. The first optical waveguide has a first length between the two locations, and the second optical waveguide has a second length between the two locations wherein the first length is smaller than the second length. Illustratively, the first optical waveguide is disposed over the window, so that the window is along the first length of the first optical fiber. In accordance with another exemplary embodiment of the present invention, a method of interleaving/deinterleaving optical signals includes providing a first optical waveguide and a second optical waveguide, which is coupled to the first optical fiber at at least two locations. The method further includes adjusting a length of the second optical waveguide to coarsely adjust channel separation, and applying laser energy to the first optical waveguide to finely adjust the channel separation.

US Patent:

6956988, Oct 18, 2005

Filed:

Mar 28, 2002

Appl. No.:

10/112624

Inventors:

Jaymin Amin - Corning NY, US
Mark F. Krol - Painted Post NY, US
Qi Wu - Eatontown NJ, US

Assignee:

Avanex Corporation - Fremont CA

International Classification:

G02B006/28
G02B006/293
G02B005/30

US Classification:

385 24, 385 11, 359484, 359494

Abstract:

In accordance with an exemplary embodiment of the present invention, an optical device includes a first element which decomposes said optical signal into a first beam and a second beam with the first beam being in a first polarization state and the second beam being in a second polarization state. The first and second polarization states being orthogonal to one another and including each of said multiple channels. The optical device further includes a second element which transforms the first beam into a first elliptically polarized state having odd channels in a third polarization state and even channels in a fourth polarization state having even channels in the third polarization state and odd channels in the fourth polarization state; and a third element which combines the odd channels into a first output port and the even channels into a second output port.

US Patent:

7257287, Aug 14, 2007

Filed:

Oct 15, 2004

Appl. No.:

10/967113

Inventors:

Jaymin Amin - Corning NY, US
Mark F. Krol - Painted Post NY, US
Qi Wu - Eatontown NJ, US

Assignee:

Avanex Corporation - Fremont CA

International Classification:

G02B 6/28
G02B 6/293
G02B 5/30

US Classification:

385 24, 385 11, 359484, 359494

Abstract:

In accordance with an exemplary embodiment of the present invention, an optical device includes an interleaver/deinterleaver, which includes a passive thermal compensator, wherein an optical signal which transverses the optical device undergoes substantially no temperature induced frequency drift over a desired temperature range.

US Patent:

7509239, Mar 24, 2009

Filed:

Mar 9, 2007

Appl. No.:

11/716425

Inventors:

Jacques Gollier - Painted Post NY, US
Garrett A. Piech - Horseheads NY, US
Michael B. Webb - Lindley NY, US
Qi Wu - Painted Post NY, US

Assignee:

Corning Incorporated - Corning NY

International Classification:

G03F 1/26

US Classification:

702191

Abstract:

An optical interrogation system is described herein that can interrogate a label-independent-detection (LID) biosensor and monitor a biological event on top of the biosensor without suffering from problematical parasitic reflections and/or problematical pixelation effects. In one embodiment, the optical interrogation system is capable of interrogating a biosensor and using a low pass filter algorithm to digitally remove problematic parasitic reflections contained in the spectrum of an optical resonance which makes it easier to determine whether or not a biological event occurred on the biosensor. In another embodiment, the optical interrogation system is capable of interrogating a biosensor and using an oversampling/smoothing algorithm to reduce oscillations in the estimated location of an optical resonance caused by the problematical pixelation effect which makes it easier to determine whether or not a biological event occurred on the biosensor.

US Patent:

7576333, Aug 18, 2009

Filed:

Aug 1, 2007

Appl. No.:

11/888495

Inventors:

Stephen J. Caracci - Elmira NY, US
Robert A. Modavis - Painted Post NY, US
David A. Pastel - Horseheads NY, US
Qi Wu - Painted Post NY, US

Assignee:

Corning Incorporated - Corning NY

International Classification:

G01J 1/58
G01N 33/53
G01N 21/62
C12Q 1/04

US Classification:

2504581, 2504591, 435 71, 435 34, 436171

Abstract:

An optical interrogation system and a method are described herein that enable the interrogation of one or more biosensors which can be located within the wells of a microplate. In one embodiment, the optical interrogation system has a tunable laser, N-fiber launches, N-lenses and N-detectors that are set-up to interrogate N-biosensors. In another embodiment, the optical interrogation system has a tunable laser, N-fiber launches, N+1 lenses and N-detectors that are set-up to interrogate N-biosensors.