Andrew G Dentai

US Patent:

6437891, Aug 20, 2002

Filed:

Oct 27, 1998

Appl. No.:

09/179673

Inventors:

Andrew Gomperz Dentai - Atlantic Highlands NJ

Assignee:

Agere Systems Guardian Corp. - Orlando FL

International Classification:

H04B 1000

US Classification:

359152, 359173, 257 80

Abstract:

In accordance with the invention, an integrated dual wavelength transceiver comprises a multilayer monolithic structure that functions as an optical waveguide, a photodetector, and a light emitter. In an alternative embodiment, second spaced apart portion on the same substrate can provide an amplifier to amplify electrical signals generated by the photodetector.

US Patent:

6498873, Dec 24, 2002

Filed:

Oct 20, 2000

Appl. No.:

09/693787

Inventors:

Sethumadhavan Chandrasekhar - Matawan NJ
Andrew Gomperz Dentai - Atlantic Highlands NJ
Barry Franklin Levine - Livingston NJ
Thomas Gordon Beck Mason - Middletown NJ
Ola Sjolund - Macungie PA

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

G02B 642

US Classification:

385 28, 385 27, 385 14, 385 38, 385 43, 385130, 385131, 385 88

Abstract:

An optical device for coupling an optical signal to an optical detector is disclosed. The optical device includes a mode compression section disposed between an optical input source and a photodetector, which enables efficient coupling between the optical input source and the photodetector.

US Patent:

7058246, Jun 6, 2006

Filed:

Oct 8, 2002

Appl. No.:

10/267346

Inventors:

Charles H. Joyner - Sunnyvale CA, US
Frank H. Peters - Cork, IE
Atul Mathur - Santa Clara CA, US
David F. Welch - Menlo Park CA, US
Andrew G. Dentai - Mountain View CA, US
Damien Lambert - Sunnyvale CA, US
Richard P. Schneider - Mountain View CA, US
Mark J. Missey - San Jose CA, US

Assignee:

Infinera Corporation - Sunnyvale CA

International Classification:

G02B 6/12

US Classification:

385 14, 385 31

Abstract:

A monolithic photonic integrated circuit (PIC) chip comprises an array of modulated sources providing a plurality of channel signals of different wavelengths and an optical combiner coupled to receive the channel signals and produce a combined output of the channel signals. The arrays of modulated sources are formed as ridge waveguides to enhance the output power from the respective modulated sources so that the average output power from the sources is approximately 2 to 4 times higher than in the case of comparable arrays of modulated sources formed as buried waveguides.

US Patent:

7072557, Jul 4, 2006

Filed:

Dec 20, 2002

Appl. No.:

10/327362

Inventors:

Radhakrishnan L. Nagarajan - Cupertino CA, US
Andrew G. Dentai - Mountain View CA, US

Assignee:

Infinera Corporation - Sunnyvale CA

International Classification:

G02B 6/00

US Classification:

385131

Abstract:

The Group III–V quaternary, InAlGaAs is employed as a waveguide layer in optical components, such as In-P based array waveguide gratings (AWGs), avalanche photodiodes (APDs) or other optical components that contain a waveguide core in the InP regime. The deployment of InAlGaAs waveguides provides for high uniform photoluminescent (PL) emission wavelength across the wafer for InAlGaAs waveguides as compared to InGaAsP waveguides as now commonly employed in such optical devices or components. The use of an InAlGaAs waveguide core has particular utility when deployed in a photonic integrated circuit (PIC) such as an AWG with a plurality of outputs optically integrated with a plurality of photodetectors, such as APDs which are exemplified in this disclosure. In lieu of an InAlGaAs waveguide, combination layers of InGaAs/InAlAs, InGaAs/InAlGaAs or InAlAs/InAlGaAs may be employed or stacks of such layers to form the waveguides in the PIC chip.

US Patent:

7437029, Oct 14, 2008

Filed:

Apr 7, 2006

Appl. No.:

11/279004

Inventors:

Charles H. Joyner - Sunnyvale CA, US
Frank H. Peters - Cork, IE
Atul Mathur - Santa Clara CA, US
David F. Welch - Menlo Park CA, US
Andrew G. Dentai - Mountain View CA, US
Damien Lambert - Sunnyvale CA, US
Richard P. Schneider - Mountain View CA, US
Mark J. Missey - San Jose CA, US

Assignee:

Infinera Corporation - Sunnyvale CA

International Classification:

G02B 6/12

US Classification:

385 14, 385 20

Abstract:

A monolithic photonic integrated circuit (PIC) chip where the active waveguide cores of the modulated sources of the PIC are multiple quantum wells (MQWs) and the passive waveguide cores of an optical combiner are a bulk layer or material. The cores of the waveguide cores may be a quaternary such as InGaAsP or InAlGaAs.

US Patent:

8269297, Sep 18, 2012

Filed:

Dec 23, 2009

Appl. No.:

12/646558

Inventors:

Radhakrishnan L. Nagarajan - Cupertino CA, US
Andrew G. Dentai - Mountain View CA, US
Scott Corzine - Sunnyvale CA, US
Steven Nguyen - San Jose CA, US
Vikrant Lal - Sunnyvale CA, US
Jacco L. Pleumeekers - Mountain View CA, US
Peter W. Evans - Mountain House CA, US

Assignee:

Infinera Corporation - Sunnyvale CA

International Classification:

H01L 31/0232

US Classification:

257432, 257189, 257E31056

Abstract:

Consistent with the present disclosure, a current blocking layer is provided between output waveguides carrying light to be sensed by the photodiodes in a balanced photodetector, and the photodiodes themselves. Preferably, the photodiodes are provided above the waveguides and sense light through evanescently coupling with the waveguides. In addition, the current blocking layer may include alternating p and n-type conductivity layers, such that, between adjacent ones of such layers, a reverse biased pn-junction is formed. The pn-junctions, therefore, limit the amount of current flowing from one photodiode of the balanced detector to the other, thereby improving performance.

US Patent:

20020197016, Dec 26, 2002

Filed:

Jun 20, 2001

Appl. No.:

09/885638

Inventors:

Sethumadhavan Chandrasekhar - Matawan NJ, US
Andrew Dentai - Atlantic Highlands NJ, US
Barry Levine - Livingston NJ, US
Thomas Mason - Bethlehem PA, US
Ola Sjolund - Macungie PA, US

International Classification:

G02B006/26

US Classification:

385/050000, 385/039000

Abstract:

A photodetector and a method of manufacture therefor. The photodetector includes a waveguide located over a photodetector substrate and a resonant coupler located over and coupled to the waveguide. An index of refraction of the resonant coupler is greater than an index of refraction of the waveguide. The photodetector also includes an absorber located over and coupled to the resonant coupler, wherein the absorber has an index of refraction greater than the index of refraction of the resonant coupler.

US Patent:

20080044128, Feb 21, 2008

Filed:

Jun 19, 2007

Appl. No.:

11/765403

Inventors:

Fred Kish - Palo Alto CA, US
David Welch - Menlo Park CA, US
Mark Missey - San Jose CA, US
Radhakrishnan Nagarajan - Cupertino CA, US
Atul Mathur - Santa Clara CA, US
Frank Peters - Cork, IE
Richard Schneider - Mountain View CA, US
Charles Joyner - Sunnyvale CA, US
Andrew Dentai - Mountain View CA, US
Damien Lambert - Sunnyvale CA, US
Masaki Kato - Sunnyvale CA, US
Sheila Hurtt - Redwood City CA, US
Randal Salvatore - Mountain View CA, US
Mehrdad Ziari - Pleasanton CA, US
Vincent Dominic - Dayton OH, US

Assignee:

INFINERA CORPORATION - Sunnyvale CA

International Classification:

G02B 6/12

US Classification:

385014000

Abstract:

A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated on the same chip.