STEPHEN E SMITH
Broker in Medford, MA

6744793, Jun 1, 2004

Dec 14, 2001

10/017351

Richard E. Stoner - Framingham MA
Jacques P. Govignon - Watertown MA
William P. Kelleher - Acton MA
Stephen P. Smith - Medford MA
Reinhardt Leon Willig - Maynard MA

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

H01S 313

372 32, 372 2902, 359110, 359187

The invention relates to a method and system for wavelength stabilization of a broadband optical source. The method and system are based on utilizing an optical power divider to generate two optical signals for each of the broadband source and a reference wavelength source. The difference in the power ratio of the two optical signals derived from the broadband source and the power ratio of the two optical signals derived from the reference wavelength source is determined. Because the power ratios are similarly affected by component aging and changes in environmental factors such as temperature and incident radiation, the difference in the power ratios can be used to adjust the wavelength of the broadband source so that its center wavelength is stabilized to the center wavelength of the reference source.

7314751, Jan 1, 2008

Jul 27, 2001

09/916419

William P. Kelleher - Action MA, US
Stephen P. Smith - Medford MA, US
Richard E. Stoner - Framingham MA, US

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

C12M 1/34, G01N 21/64

4352887, 4352872, 435808, 422 8208, 422 8211, 385 12

A fluorescence detection system includes a photonic band gap structure. An internal surface of the photonic band gap structure defines a core region, and is coated with a film formed of conjugated polymer molecules. The core region is filled with a sample fluid or gas having a plurality of either chemical or biological analytes dispersed therein. An optical source generates excitation light directed to the sample fluid. In response, a binding event between a bacterium or chemical species in the fluid or gas and one or more of the conjugated polymer molecules generates a fluorescent signal whose wavelength falls within the photonic band gap. The fluorescent signal is guided through said core region by resonant reflections, and is guided onto a detector. A plurality of photonic band gap structures may be combined so as to form a biosensor array.

7180598, Feb 20, 2007

Nov 13, 2003

10/712702

Reinhardt L. Willig - Maynard MA, US
William P. Kelleher - Acton MA, US
Stephen P. Smith - Medford MA, US

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01C 19/72, G02B 6/00

356460, 385 12

A photonic crystal interferometric optical gyroscope system including a light source for providing a primary beam of light, a photonic crystal sensing coil having a rotational axis, and a beam controlling device configured to split the primary beam into first and second counter-propagating beams in the photonic crystal sensing coil and configured to direct return of the counter-propagating beams wherein the power of the returning counter-propagating beams represents the phase shift between the counter-propagating beams and is indicative of the rate of rotation of the coil about the rotational axis.

6867411, Mar 15, 2005

Oct 25, 2001

10/000584

William P. Kelleher - Action MA, US
Stephen P. Smith - Medford MA, US
Richard E. Stoner - Framingham MA, US

The Charles Stark Draper Laboratory, Inc. - Cambridge MA

G01D005/34

25023111, 25022711, 7351419

An optical accelerometer for detecting an acceleration of a proof mass includes a source of optical radiation for generating a pair of beams of output radiation. The pair of beams of optical radiation exerts radiation pressure on the proof mass, so as to maintain the proof mass in an equilibrium position along a sensing axis. A position detecting system detects a displacement from the equilibrium position of the proof mass along the sensing axis in response to an inertial force acting on the proof mass. A modulator adjusts the intensity of each one of the pair of beams, so as to restore the proof mass to the equilibrium position along the sensing axis. The difference in the adjusted intensities of each one of the pair of beams is representative of the acceleration, resulting from the inertial force, of the proof mass along the sensing axis.

2008011, May 22, 2008

Dec 12, 2007

12/001564

Enoch Kim - Boston MA, US
Younan Xia - Seattle WA, US
Milan Mrksich - Chicago IL, US
Rebecca Jackman - Boston MA, US
Xiao-Mei Zhao - Pepper Pike OH, US
Stephen Smith - Medford MA, US
Mara Prentiss - Belmont MA, US
George Whitesides - Newton MA, US
Christian Marzolin - Paris, FR

President and Fellows of Harvard College - Cambridge MA

B29C 45/16

264259000

Chemically or biochemically active agents or other species are patterned on a substrate surface by providing a micromold having a contoured surface and forming, on a substrate surface, a chemically or biochemically active agent or fluid precursor of a structure. A chemically or biochemically active agent or fluid precursor also can be transferred from indentations in an applicator to a substrate surface. The substrate surface can be planar or non-planar. Fluid precursors of polymeric structures, inorganic ceramics and salts, and the like can be used to form patterned polymeric articles, inorganic salts and ceramics, reactive ion etch masks, etc. at the surface. The articles can be formed in a pattern including a portion having a lateral dimension of less than about 1 millimeter or smaller. The indentation pattern of the applicator can be used to transfer separate, distinct chemically or biochemically active agents or fluid precursors to separate, isolated regions of a substrate surface. Waveguide arrays, combinatorial chemical or biochemical libraris, etc. can be made. Differences in refractive index of waveguide and cladding can be created by subjecting the waveguide and cladding, made of identical prepolymeric material, to different polymerization or cross-linking conditions. Interferometers are defined by coupling arrays of waveguides, where coupling can be controlled by altering the difference in refractive index between cladding and waveguide at any desired location of the array. Alteration and refractive index can be created photochemically, chemically, or the like. Sensors also are disclosed, including biochemical sensors.

8012382, Sep 6, 2011

Mar 4, 2009

12/398132

Enoch Kim - Boston MA, US
Younan Xia - St. Louis MO, US
Milan Mrksich - Hinsdale IL, US
Rebecca J. Jackman - Jamaica Plain MA, US
Xiao-Mei Zhao - Pepper Pike OH, US
Stephen P. Smith - Medford MA, US
Christian Marzolin - Paris, FR
Mara G. Prentiss - Belmont MA, US
George M. Whitesides - Newtown MA, US

President and Fellows of Harvard College - Cambridge MA

B29D 11/00, G02B 6/00, G02B 6/10, G02B 1/12, D04H 1/20, B29C 45/14, B29C 43/00, B29C 35/08, B29C 39/00, B29C 41/00, B28B 1/14, B44C 1/22, C03C 15/00, C03C 25/68, C23F 1/00

264 124, 264 127, 264112, 264259, 264260, 264496, 264621, 264298, 264299, 264494, 216 44

Chemically or biochemically active agents or other species are patterned on a substrate surface by providing a micromold having a contoured surface and forming, on a substrate surface, a chemically or biochemically active agent or fluid precursor of a structure. A chemically or biochemically active agent or fluid precursor also can be transferred from indentations in an applicator to a substrate surface. The substrate surface can be planar or non-planar. Fluid precursors of polymeric structures, inorganic ceramics and salts, and the like can be used to form patterned polymeric articles, inorganic salts and ceramics, reactive ion etch masks, etc. at the surface. The articles can be formed in a pattern including a portion having a lateral dimension of less than about 1 millimeter or smaller. The indentation pattern of the applicator can be used to transfer separate, distinct chemically or biochemically active agents or fluid precursors to separate, isolated regions of a substrate surface. Waveguide arrays, combinatorial chemical or biochemical libraris, etc.