Israel Smilanski

6671425, Dec 30, 2003

Jun 18, 2002

10/173581

Jacob B. Khurgin - Baltimore MD
Nadejda Reingand - Baltimore MD
Isaac Shpantzer - Bethesda MD
Israel Smilanski - Rockville MD
Pak Shing Cho - Gaithersburg MD

CeLight - Silver Spring MD

G02F 1335

385 7, 385 39, 372 20, 372 13, 372 64, 359326

The present invention relates to an integrated light source having first and second optical waveguides defining a first optical coupling region for coupling light therebetween. At least one of the optical waveguides includes a gain medium configured to emit light upon irradiation. The light source also includes a first acoustic wave source to subject the first optical coupling region to acoustic waves having a longitudinal frequency , whereby a frequency of light propagating along one of the first and second waveguides differs from a frequency of light propagating along the other waveguide by an amount by an amount.

7113598, Sep 26, 2006

May 13, 2004

10/844903

Allen M. Flusberg - Newton MA, US
Jonah H. Jacob - Brookline MA, US
Martin A. Jaspan - Somerville MA, US
Israel Smilanski - Cambridge MA, US

Science Research Laboratory, Inc. - Somerville MA

H04K 1/00

380256, 380277, 380278, 380263, 380283

Methods and systems enabling enhanced bit-rate QKD fiber-based key delivery. In one embodiment, a secure communications network of this invention includes a number of communication nodes, each of the communication nodes being connected to a quantum channel. At least one of the communication nodes (a sending node) includes a multiplexing system capable of assembling a succession of substantially single photons in a predetermined order. At least another of the communication nodes (a receiving node) includes a receiving system capable of receiving at least some of the assembled succession of substantially single photons, a demultiplexing system capable of separating the received assembled succession of substantially single photons into a number of separated successions of substantially single photons, and, a number of detector systems, each one of the detector systems being capable of detecting one separated succession of the successions of substantially single photons.

7167651, Jan 23, 2007

Sep 26, 2001

09/962243

Isaac Shpantzer - Bethesda MD, US
Michael Tseytlin - Bethesda MD, US
Yaakov Achiam - Rockville MD, US
Aviv Salamon - Washington DC, US
Israel Smilanski - Rockville MD, US
Olga Ritterbush - Rockville MD, US
Pak Shing Cho - Gaithersburg MD, US
Li Guoliang - North Potomac MD, US
Jacob Khurgin - Baltimore MD, US
Yehouda Meiman - Rishon Letzion, IL
Alper Demir - Jersey City NJ, US
Peter Feldman - Short Hills NJ, US
Peter Kinget - Summit NJ, US
Nagendra Krishnapura - Hoboken NJ, US
Jaijeet Roychowdhury - Minneapolis MN, US
Joseph Schwarzwalder - Gaithersburg MD, US
Charles Sciabarra - Ellicott City MD, US

CeLight, Inc. - Silver Spring MD

H04J 4/00
H04B 10/00
H04B 10/04
H04B 10/06

398 77, 398 74, 398152, 398184, 398205

A system for optical communication forms a family of orthogonal optical codes modulated by a data stream. The orthogonal codes are formed by creating a stream of evenly spaced-apart pulses using a pulse spreader circuit and modulating the pulses in amplitude and/or phase to form a family of orthogonal optical code words, each representing a symbol. A spreader calibration circuit is used to ensure accurate timing and modulation. Each code word is further modulated by a predetermined number of data bits. The data modulation scheme splits a code word into H and V components, and further processes the components prior to modulation with data, followed by recombining with a polarization beam combiner. The data-modulated code word is then sent, along with others to receiver. The received signal is detected and demodulated with the help of a symbol synchronization unit which establishes the beginning and end of the code words.

7266307, Sep 4, 2007

Aug 9, 2002

10/215036

Isaac Shpantzer - Bethesda MD, US
Israel Smilanski - Rockville MD, US
Jacob B. Khurgin - Baltimore MD, US
Vladimir Grigoryan - Elkridge MD, US
Pak Shing Cho - Gaithersburg MD, US
Nadejda Reingand - Baltimore MD, US
Guy Levy-Yurista - Tel Aviv, IL
Guoliang Li - North Potomac MD, US

H04B 10/00
H04B 10/04

398193, 398155, 398195, 398199

One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape. The predetermined pulse shape being based on a transmission characteristic of the transmission link.

7315697, Jan 1, 2008

Jun 18, 2002

10/173579

Israel Smilanski - Rockville MD, US
Isaac Shpantzer - Bethesda MD, US
Jacob B. Khurgin - Baltimore MD, US
Nadejda Reingand - Baltimore MD, US
Pak Shing Cho - Gaithersburg MD, US
Yaakov Achiam - Rockville MD, US

CeLight, Inc. - Silver Spring MD

H04J 14/02
H04B 10/04

398201, 398 87, 398183, 398193, 398200

A multiple wavelength light source generates an output signal having a comb of accurately spaced apart frequencies with variable free spectral range in the C-band of optical fiber communication. The light source employs an electro-optical modulator (EOM) driven by a signal generator which modulates with EOM with multiple modulation frequencies to widen the output spectrum of signal. The EOM has a crystal provided with a waveguide. The waveguide may be doped with a rare-earth metal to impart gain properties to equalize the intensities of the comb. In one preferred embodiment, Er, Yt or other doping elements provide the gain property to waveguides. The crystal is also provided with periodically poled structure, and this may be engineered so as to form domains of unequal widths to improve the efficiency of modulation. The output signal from the light source may be split and presented to a bank of filters to create a multiple signals, each signal having one of the spaced apart frequencies. The output signals may be used as channels to be modulated by data and then combined in dense wavelength division multiplexing system, or may be used as a soliton source in time-division multiplexed communication systems.

7391969, Jun 24, 2008

Dec 27, 2006

11/616417

Isaac Shpantzer - Bethesda MD, US
Israel Smilanski - Rockville MD, US
Jacob B. Khurgin - Baltimore MD, US
Vladimir Grigoryan - Elkridge MD, US
Pak Shing Cho - Gaithersburg MD, US
Nadejda Reingand - Baltimore MD, US
Guy Levy-Yurista - Tel Aviv, IL
Guoliang Li - North Potomac MD, US

CeLight, Inc. - Silver Spring MD

H04B 10/08

398 25, 398 28

One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape. The predetermined pulse shape being based on a transmission characteristic of the transmission link.

7512338, Mar 31, 2009

Aug 11, 2006

11/503456

Isaac Shpantzer - Bethesda MD, US
Israel Smilanski - Rockville MD, US
Jacob B. Khurgin - Baltimore MD, US
Vladimir Grigoryan - Elkridge MD, US
Pak Shing Cho - Gaithersburg MD, US
Nadejda Reingand - Baltimore MD, US
Guy Levy-Yurista - Tel Aviv, IL
Guoliang Li - North Potomac MD, US

CeLight, Inc. - Silver Spring MD

H04B 10/08
H04B 10/00

398 25, 398159, 398161

One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and a clock signal. The pulse generator is also configured to modify the optical signal based on the clock signal to produce an optical pulse having a predetermined pulse shape. The clock signal is associated with the predetermined pulse shape. The predetermined pulse shape being based on a transmission characteristic of the transmission link.