William F Wong

US Patent:

7280730, Oct 9, 2007

Filed:

May 13, 2004

Appl. No.:

10/844943

Inventors:

Liang Dong - Ann Arbor MI, US
Donald J. Harter - Ann Arbor MI, US
William Wong - Ann Arbor MI, US

Assignee:

Imra America, Inc. - Ann Arbor MI

International Classification:

G02B 6/02
G02B 6/26

US Classification:

385126, 385 28, 385123, 385124, 385127, 385128

Abstract:

Various types of holey fiber provide optical propagation. In various embodiments, for example, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or the hole spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers. Other embodiments are also provided.

US Patent:

7707538, Apr 27, 2010

Filed:

Jun 15, 2007

Appl. No.:

11/764128

Inventors:

William S. Wong - Ann Arbor MI, US
Yenwen Lu - Los Altos CA, US
Jiangwei Li - Palo Alto CA, US
Tatsuo Nishibe - Ibaraki, JP

Assignee:

Brion Technologies, Inc. - Santa Clara CA

International Classification:

G06F 17/50

US Classification:

716 19

Abstract:

The method of the invention tracks how the collective movement of edge segments in a mask layout alters the resist image values at control points in the layout and simultaneously determines a correction amount for each edge segment in the layout. A multisolver matrix that represents the collective effect of movements of each edge segment in the mask layout is used to simultaneously determine the correction amount for each edge segment in the mask layout.

US Patent:

7787729, Aug 31, 2010

Filed:

May 20, 2005

Appl. No.:

11/134856

Inventors:

Liang Dong - Ann Arbor MI, US
William Wong - Ann Arbor MI, US
Martin E. Fermann - Dexter MI, US

Assignee:

Imra America, Inc. - Ann Arbor MI

International Classification:

G02B 6/02

US Classification:

385123, 385124, 385125, 385126, 385127

Abstract:

Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprising cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

US Patent:

8055109, Nov 8, 2011

Filed:

Jun 22, 2010

Appl. No.:

12/820950

Inventors:

Liang Dong - Ann Arbor MI, US
William Wong - Ann Arbor MI, US
Martin E. Fermann - Dexter MI, US

Assignee:

IMRA America, Inc. - Ann Arbor MI

International Classification:

G02B 6/00

US Classification:

385123, 385126

Abstract:

Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprising cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

US Patent:

8239786, Aug 7, 2012

Filed:

Dec 22, 2009

Appl. No.:

12/644790

Inventors:

William S. Wong - Ann Arbor MI, US
Fei Liu - San Jose CA, US
Yen-Wen Lu - Los Altos CA, US

Assignee:

ASML Netherlands B.V. - Veldhoven

International Classification:

G06F 17/50

US Classification:

716 51, 716 50, 716 52, 716 53, 716 54, 716 55

Abstract:

A multivariable solver for proximity correction uses a Jacobian matrix to approximate effects of perturbations of segment locations in successive iterations of a design loop. The problem is formulated as a constrained minimization problem with box, linear equality, and linear inequality constraints. To improve computational efficiency, non-local interactions are ignored, which results in a sparse Jacobian matrix.

US Patent:

8285099, Oct 9, 2012

Filed:

Sep 6, 2007

Appl. No.:

11/851270

Inventors:

Liang Dong - Ann Arbor MI, US
Donald J. Harter - Ann Arbor MI, US
William Wong - Ann Arbor MI, US

Assignee:

IMRA America, Inc. - Ann Arbor MI

International Classification:

G02B 6/36
G02B 6/32
H01S 3/00

US Classification:

385125, 385123, 385124, 385126, 385127, 385128, 3593411, 3593413

Abstract:

Various types of holey fiber provide optical propagation. In various embodiments, for example, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or the hole spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holely fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers. Other embodiments are also provided.

US Patent:

8290322, Oct 16, 2012

Filed:

Sep 26, 2011

Appl. No.:

13/245408

Inventors:

Liang Dong - Clemson SC, US
William Wong - Ann Arbor MI, US
Martin E. Fermann - Ann Arbor MI, US

Assignee:

IMRA America, Inc. - Ann Arbor MI

International Classification:

G02B 6/00

US Classification:

385123, 385124, 385126, 385127

Abstract:

Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprising cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

US Patent:

8291352, Oct 16, 2012

Filed:

Mar 10, 2010

Appl. No.:

12/721331

Inventors:

William S. Wong - Ann Arbor MI, US
Yenwen Lu - Los Altos CA, US
Jiangwei Li - Palo Alto CA, US
Tatsuo Nishibe - Moriva, JP

Assignee:

ASML Netherlands B.V. - Veldhoven

International Classification:

G06F 17/50

US Classification:

716 53, 716 55

Abstract:

The method of the invention tracks how the collective movement of edge segments in a mask layout alters the resist image values at control points in the layout and simultaneously determines a correction amount for each edge segment in the layout. A multisolver matrix that represents the collective effect of movements of each edge segment in the mask layout is used to simultaneously determine the correction amount for each edge segment in the mask layout.