Jean Francois Seurin

US Patent:

20130163627, Jun 27, 2013

Filed:

Dec 24, 2011

Appl. No.:

13/337098

Inventors:

Jean F. Seurin - Princeton Junction NJ, US
Chuni L. Ghosh - West Windsor NJ, US
Qing Wang - Plainsboro NJ, US

Assignee:

PRINCETON OPTRONICS - Mercerville NJ

International Classification:

H01S 3/04
H01S 3/00
H01S 5/183
H01S 5/42

US Classification:

372 36, 372 50124, 372 3802

Abstract:

An optical illuminator using Vertical Cavity Surface Emitting Laser (VCSEL) is disclosed. Optical modules configured using single VCSEL and VCSEL arrays bonded to a thermal submount to conduct heat away from the VCSEL array, are suited for high power and high speed operation. High speed optical modules are configured using single VCSEL or VCSEL arrays connected to a high speed electronic module on a common thermal submount or on a common Printed Circuit Board (PCB) platform including transmission lines. The electronic module provides low inductance current drive and control functions to operate the VCSEL and VCSEL array. VCSEL apertures are designed for a desired beam shape. Additional beam shaping elements are provided for VCSELs or VCSEL arrays, for desired output beam shapes and/or emission patterns. VCSEL arrays may be operated in continuous wave (CW) or pulse operation modes in a programmable fashion using a built-in or an external controller.

US Patent:

8576885, Nov 5, 2013

Filed:

Feb 9, 2012

Appl. No.:

13/369581

Inventors:

Robert van Leeuwen - Ewing NJ, US
Yihan Xiong - Pennington NJ, US
Jean F Seurin - Princeton Junction NJ, US
Chuni L Ghosh - West Windsor NJ, US
Bing Xu - Bayside NY, US

Assignee:

Princeton Optronics, Inc. - Mercerville NJ

International Classification:

H01S 3/04

US Classification:

372 34, 372 36, 372 3805, 372 5012, 372 50124, 372 72

Abstract:

Optical pump modules using VCSEL arrays are provided to pump optical gain media for achieving high power laser output in CW, QCW and pulse operation modes for operation. Low divergence and symmetric far-field emission from VCSELs are particularly suitable for compact arrays. VCSEL arrays configured as laser pump modules are operable at high temperatures with practically no degradation over a long period of time. VCSEL pump modules are adaptable for side- or end-pumping configurations to pump high power lasers in CW, QCW and pulse mode. Power output from VCSEL pump modules is scalable. Incorporating microlens arrays with the VCSEL arrays improve brightness of the pump modules. High power and high temperature operation of VCSEL modules make it suitable for making compact high power solid state lasers that are operable in small spaces such as, ignition of internal combustion engines, stationary power generation engines and pulsed detonation engines.

US Patent:

20150362585, Dec 17, 2015

Filed:

Jun 13, 2014

Appl. No.:

14/304872

Inventors:

- Mercerville NJ, US
Jean Francois Seurin - Princeton Junction NJ, US
Laurence S. Watkins - Pennington NJ, US

Assignee:

PRINCETON OPTRONICS INC. - Mercerville NJ

International Classification:

G01S 7/481
G01S 17/02
H01S 5/022
H01S 5/42
H01S 5/00
G01S 17/89
G01S 7/484

Abstract:

An apparatus and a method are provided for 3-D imaging and scanning using a 2-D planar VCSELs source configured as a lightfiled optical source. VCSELs are configured in different 2-D spatial arrangements including single VCSEL, or preferably a group, cluster, or array each to be operated effectively as an independent VCSEL array source. A set of microlens and an imaging lens positioned at a pre-determined distance collimates radiation from each VCSEL array source to a set of parallel beams. The parallel beams from different VCSEL array sources generated in a rapid pre-determined timing sequence provide scanning beams to illuminate an object. The radiation reflected from the object is analyzed for arrival time, pulse shape, and intensity to determine a comprehensive set of distance and intensity profile of the object to compute a 3-D image.

US Patent:

20150260830, Sep 17, 2015

Filed:

Jun 12, 2014

Appl. No.:

14/303161

Inventors:

- Mercerville NJ, US
Jean Francois Seurin - Princeton Junction NJ, US
Laurence S Watkins - Pennington NJ, US

Assignee:

PRINCETON OPTRONICS INC. - Mercerville NJ

International Classification:

G01S 7/481
H01S 5/00
G01S 7/484
G01S 17/89
G01S 17/02
H01S 5/42
H01S 5/022

Abstract:

An apparatus and a method are provided for 3-D proximity sensing, imaging and scanning using a 2-D planar VCSEL array source using reflected radiation from an object being detected. An important aspect of the apparatus is a compact high power optical source and in particular, an optical source comprising a plurality of VCSELs to illuminate the object. VCSELs in the optical source are configured in different 2-D planar arrangements, such that the optical source may be used in many different modes to adapt to different sensing, imaging and scanning requirement suited for different environments including one where shape, size and illumination mode require to be altered dynamically. When used in different modes of operation the apparatus provides a comprehensive set of measured distance and intensity profile of the object to compute a 3-D image.