Lawrence H Domash

6567573, May 20, 2003

Aug 13, 1998

09/133524

Lawrence H. Domash - Conway MA
Brent Little - Boston MA

DigiLens, Inc. - Sunnyvale CA

G02B 626

385 16, 385 24, 385 37, 385 10

This invention relates to a number of components, devices and networks involving integrated optics and/or half coupler technology, all of which involve the use of electronically switchable Bragg grating devices and device geometries realized using holographic polymer/dispersed liquid crystal materials. Most of the components and devices are particularly adapted for use in wavelength division multiplexing (WDM) systems and in particular for use in switchable add/drop filtering (SADF) and wavelength selective crossconnect. Attenuators, outcouplers and a variety of other devices are also provided.

6771857, Aug 3, 2004

Mar 26, 2002

10/107593

Lawrence H. Domash - Conway MA
Brent Little - Boston MA

Hoya Corporation

G02B 634

385 37, 385129, 349201

This invention relates to a number of components, devices and networks involving integrated optics and/or half coupler technology, all of which involve the use of electronically switchable Bragg grating devices and device geometries realized using holographic polymer/dispersed liquid crystal materials. Most of the components and devices are particularly adapted for use in wavelength division multiplexing (WDM) systems and in particular for use in switchable add/drop filtering (SADF) and wavelength selective crossconnect. Attenuators, outcouplers and a variety of other devices are also provided.

6985281, Jan 10, 2006

Nov 27, 2002

10/306056

Matthias Wagner - Cambridge MA, US
Robert Murano - Malden MA, US
Eugene Y. Ma - Chestnut Hill MA, US
Steven Sherman - Boston MA, US
Lawrence H. Domash - Conway MA, US

Aegis Semiconductor, Inc. - Woburn MA

G02F 1/29

359315, 359578

An optoelectronic device including a header having an upper surface and including a plurality of conducting pins extending up through the upper surface; an optical device; a tunable optical filter, wherein the optical device and the tunable optical filter are arranged in a vertical stack mounted on and extending above the upper surface of the header and wherein the tunable optical filter is electrically connected to the plurality of conducting pins; and a cap affixed to the header and along with the header defining a sealed interior containing the optical device and the tunable optical filter, wherein the cap has a top surface with a window formed therein, and wherein the window is aligned with the tunable optical filter and the optical device.

7002697, Feb 21, 2006

Aug 2, 2002

10/211970

Lawrence H. Domash - Conway MA, US
Adam M. Payne - Conway MA, US
Eugene Y. Ma - Brookline MA, US
Nikolay Nemchuk - North Andover MA, US
Ming Wu - Princeton NJ, US
Robert Murano - Malden MA, US
Steven Sherman - Arlington MA, US
Matthias Wagner - Boston MA, US

Aegis Semiconductor, Inc. - Woburn MA

G01B 9/02

356519

An optical instrument including: a thermo-optically tunable, thin film, free-space interference filter having a tunable passband which functions as a wavelength selector, the filter including a sequence of alternating layers of amorphous silicon and a dielectric material deposited one on top of the other and forming a Fabry-Perot cavity structure having: a first multi-layer thin film interference structure forming a first mirror; a thin-film spacer layer deposited on top of the first multi-layer interference structure, the thin-film spacer layer made of amorphous silicon; and a second multi-layer thin film interference structure deposited on top of the thin-film spacer layer and forming a second mirror; a lens for coupling an optical beam into the filter; an optical detector for receiving the optical beam after the optical beam has interacted with the interference filter; and circuitry for heating the thermo-optically tunable interference filter to control a location of the passband.

7003181, Feb 21, 2006

Jul 6, 2004

10/885163

Lawrence H. Domash - Conway MA, US
Brent Little - Boston MA, US

G02F 1/295

385 10, 385 4, 385 8

This invention relates to a number of components, devices and networks involving integrated optics and/or half coupler technology, all of which involve the use of electronically switchable Bragg grating devices and device geometries realized using holographic polymer/dispersed liquid crystal materials. Most of the components and devices are particularly adapted for use in wavelength division multiplexing (WDM) systems and in particular for use in switchable add/drop filtering (SADF) and wavelength selective crossconnect. Attenuators, outcouplers and a variety of other devices are also provided.

7049004, May 23, 2006

Sep 19, 2003

10/666974

Lawrence H. Domash - Conway MA, US
Eugene Ma - Chestnut Hill MA, US
Robert Murano - Melrose MA, US
Nikolay Nemchuk - North Andover MA, US
Adam Payne - Atlanta GA, US
Steven Sherman - Boston MA, US
Matthias Wagner - Cambridge MA, US
Ming Wu - Arlington MA, US

Aegis Semiconductor, Inc. - Woburn MA

B32B 9/04
G02B 1/00

428446, 428641, 428622, 428687, 428620, 4289122, 359788, 359582, 359584, 359586

According to various embodiments and aspects of the present invention, there is provided a dynamically tunable thin film interference coating including one or more layers with thermo-optically tunable refractive index. Tunable layers within thin film interference coatings enable a new family of thin film active devices for the filtering, control, modulation of light. Active thin film structures can be used directly or integrated into a variety of photonic subsystems to make tunable lasers, tunable add-drop filters for fiber optic telecommunications, tunable polarizers, tunable dispersion compensation filters, and many other devices.

7221827, May 22, 2007

Sep 7, 2004

10/935692

Lawrence H. Domash - Conway MA, US
Matthias Wagner - Cambridge MA, US

Aegis Semiconductor, Inc. - Woburn MA

G02B 6/26
G02B 6/42
G02F 1/19
H04B 10/18

385 47, 385 27, 385 89, 359288, 3593375

An optical dispersion compensator including: a spacer element having a top surface and a bottom surface; a thin film, multi-layer mirror formed on the top surface of the spacer element, the thin film mirror having a thermally tunable reflectivity; a highly reflective mirror element formed on the bottom surface of the spacer element; and a heater element for controlling a temperature of the thermally tunable thin film mirror.

20020092963, Jul 18, 2002

Oct 19, 2001

10/000146

Lawrence Domash - Conway MA, US
Eugene Ma - Brookline MA, US
Adam Payne - Princeton NJ, US
Matthias Wagner - Boston MA, US

G01J001/20

250/201100

An optical system including a steered beam, further includes a source of a light beam; a device which receives the light beam and steers it to form the steered beam; a target of the steered beam; and a semi-transparent sensor having an output signal indicative of a deviation of the steered beam from the target. A method of performing real-time control of an optical switch includes steering an optical beam onto a target within the switch; measuring a deviation of the optical beam from a nominal center of the target, while the optical beam is on the target; and correcting the direction of the optical beam to the nominal center of the target.