Yan Hua Zhou, Age 581742 Sonya Ct, Bend, OR 97701

6879757, Apr 12, 2005

Dec 4, 2002

10/310330

Yan Zhou - Pleasanton CA, US
Shide Cheng - Pleasanton CA, US
Seng-Tiong Ho - Wheeling IL, US

Phosistor Technologies, Inc. - Wheeling IL

G02B006/30

385 49, 385 50, 385 52, 385 89, 385 14

In a connection between an optical fiber or optical fiber array and an integrated optical waveguide or integrated optical waveguide array mounted or fabricated on a grooved substrate, an end face of an optical fiber array has a first facet and a second facet. The first facet has an inclination angle substantially equal to the inclination angle of an end wall of the substrate groove; the second facet has an inclination angle substantially equal to the inclination angle of the end face of the integrated optical waveguide. When the optical fiber array is mounted on the grooved substrate, each of the fibers rests in one of the substrate grooves. The first facet of each optical fiber end face is aligned with the end wall of the groove in which it rests, and the second facet is aligned with the end face of the integrated optical waveguide.

6888989, May 3, 2005

Dec 4, 2002

10/310604

Yan Zhou - Pleasanton CA, US
Seng-Tiong Ho - Wheeling CA, US

Phosistor Technologies, Inc. - Wheeling IL

G02B006/26

385 50, 385 14, 385 49, 385131, 372 50

A coupling system for photonic integrated circuits and integrated optical waveguides is provided. A recess is formed in a substrate on which one or more integrated optical waveguides are disposed, the recess being located at the desired mounting location of the photonic integrated circuit. At least one end wall of the recess is inclined with respect to a normal to the substrate surface. At least one end face of a photonic integrated circuit is inclined to match the inclined end wall of the recess. The length, width, and depth of the recess are controlled so that inserting the photonic integrated circuit into the recess passively provides both lateral and vertical alignment of the photonic integrated circuit with the integrated optical waveguide(s).

7126693, Oct 24, 2006

Mar 29, 2004

10/811748

Matthew J. Everett - Livermore CA, US
Yan Zhou - Pleasanton CA, US

Carl Zeiss Meditec, Inc. - Dublin CA

G01B 9/00

356479, 356497, 356369

The present invention discloses simple and yet highly efficient configurations of optical coherence domain reflectometry systems. The combined use of a polarizing beam splitter with one or two polarization manipulator(s) that rotate the returned light wave polarization to an orthogonal direction, enables one to achieve high optical power delivery efficiency as well as fixed or predetermined output polarization state of the interfering light waves reaching a detector or detector array, which is especially beneficial for spectral domain optical coherence tomography. In addition, the system can be made insensitive to polarization fading resulting from the birefringence change in the sample and reference arms. Dispersion matching can also be easily achieved between the sample and the reference arm for high resolution longitudinal scanning.

7218809, May 15, 2007

Aug 31, 2005

11/216758

Yan Zhou - Pleasanton CA, US
Seng-Tiong Ho - Wheeling IL, US

G02B 6/26
G02B 6/42

385 28, 385 43

Composite optical waveguide structures or mode transformers and their methods of fabrication and integration are disclosed, wherein the structures or mode transformers are capable of bi-directional light beam transformation between a small mode size waveguide and a large mode size waveguide. One aspect of the present invention is directed to an optical mode transformer comprising a waveguide core having a high refractive index contrast between the waveguide core and the cladding, the optical mode transformer being configured such that the waveguide core has a taper wherein a thickness of the waveguide core tapers down to a critical thickness value, the critical thickness value being defined as a thickness value below which a significant portion of the energy of a light beam penetrates into the cladding layers surrounding the taper structure thereby enlarging the small mode size. This primary tapered core structure may be present in either a vertical or horizontal direction and may be combined with further up taper or down taper structures in the directions transverse to the primary taper direction. Another aspect of the present invention is directed to a non-cylindrical graduated refractive index (GRID) lens structure.

7303339, Dec 4, 2007

Aug 28, 2003

10/651372

Yan Zhou - Pleasanton CA, US
Shide Cheng - Pleasanton CA, US
Seng-Tiong Ho - Wheeling IL, US

Phosistor Technologies, Inc. - Pleasanton CA

G02B 6/42
H04B 10/12

385 91, 398141, 398164

Optical modules and methods for making optical modules are described. In one embodiment, an optical module includes a substrate assembly including a photonic chip mounting region, and a groove extending towards the photonic chip mounting region. A waveguide is disposed within the groove. A plurality of spacers is on the chip mounting region, each spacer having a predetermined height. A photonic chip is placed on the plurality of spacers and above the chip mounting region, and an optical coupler is between the photonic chip and the waveguide.

7323802, Jan 29, 2008

Apr 27, 2001

10/296413

Chan Hin Kam - Singapore, SG
Yee Loy Lam - Singapore, SG
Yan Zhou - Pleasanton CA, US
Shide Cheng - Pleasanton CA, US
Woon Siong Gan - Singapore, SG

Acoustical Technologies Singapore Pte. Ltd. - Singapore
Nanyang Technological University - Singapore

H01L 41/08

310313B, 310313 R

A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (). The device is operated in alternate-phase mode by connecting the two electrodes to different ends of an electrical source (). The device is operated in single-phase mode by connecting the two electrodes to the same end of an electrical source.

7382464, Jun 3, 2008

Dec 9, 2005

11/298105

Matthew J. Everett - Livermore CA, US
Yan Zhou - Pleasanton CA, US

Carl Zeiss Meditec, Inc. - Dublin CA

G01B 9/02

356479

This invention provides a better apparatus and method for the generation of Optical Coherence Tomography (OCT) and Confocal Scanning Laser Ophthalmoscope (CSLO) images, using a dual-waveguiding module. A dual-waveguiding structure consists of a single-mode and a multi-mode waveguide each with optimum size and numerical aperture for highly efficient collection of the OCT and CSLO optical signals. Separation of the two signals is achieved by channeling most of the multi-mode guided optical power to a CSLO detector. The non-tapped single-mode guided optical wave is further sent to a pure single-mode fiber of a standard OCT system for OCT image generation. The present invention achieves highly efficient optical power usage and hence high signal to noise ratio, together with inherent pixel-to-pixel registration of the OCT and CSLO images, and a cost reduction of the OCT/CSLO combo system.

7388672, Jun 17, 2008

Nov 2, 2005

11/264871

Yan Zhou - Pleasanton CA, US
Matthew J. Everett - Livermore CA, US
Martin Hacker - Pleasanton CA, US

Carl Ziess Meditec, Inc. - Dublin CA

G01B 9/02

356479

An interferometer configured for use in optical coherence domain (OCT) reflectometry systems is disclosed. In the preferred embodiments, efficient routing of light and a balanced detection arrangement provide a high signal to noise ratio. In a first set of embodiments, a 3×3 coupler is used to split light along separate sample and reference paths and also for combining light returning from those paths and supplying the interfered collected light to the detection system. In an alternate set of embodiments, a pair of cascaded 2×2 couplers provides a similar function. The interferometer can be used with various OCT modalities including time-domain and frequency domain approaches.