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3D Diode-Cross-Coupled Tapered Lasers for Kilowatt-Class, Chip-Scale, Laser…

Award Information

Agency:
Department of Defense
Branch:
Defense Advanced Research Projects Agency
Award ID:
77314
Program Year/Program:
2006 / SBIR
Agency Tracking Number:
06SB2-0278
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
nLight Photonics
5408 NE 88th Street, Bldg E Vancouver, WA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2006
Title: 3D Diode-Cross-Coupled Tapered Lasers for Kilowatt-Class, Chip-Scale, Laser Diode Phased Arrays
Agency / Branch: DOD / DARPA
Contract: W31P4Q-07-C-0065
Award Amount: $98,058.00
 

Abstract:

In this proposal, nLight and their collaborator, Eric Johnson, of CREOL, seek to address the main limitations in generating phased arrays by using very high power single mode tapered devices that are phase locked via long "coupling" lasers. The individual diodes would be phase aligned by careful control of their drive current - this would fine-tune the phase to bring it into alignment. The coupling laser makes use of a approach pioneered by Eric Johnson's group - using second order gratings buried inside a diode laser to vertically cross-couple through free space to a second diode laser placed above. The extension here is to use high power tapered single mode devices as the "slave lasers" in amplifier configuration, with a low power, very long cavity laser above them as a master oscillator in a 3-D configuration. Using high power single mode devices (here we target 15-W per emitter) means relatively few emitters are needed to deliver a 10-kW module - just 700 of them, corresponding to two 25 bar stacks of 200-W bars. Using a laser as the master oscillator means the locking signal is automatically phase coherent over long distances. Finally, the small number of devices required means that phasing the individual tapers together by controlling the current is a practical reality.

Principal Investigator:

Paul Crump
Program Manager
3607135161
paul.crump@nlight.net

Business Contact:

David Gustafson
Mgr Advanced Technology P
3605664471
david.gustafson@nlight.net
Small Business Information at Submission:

NLIGHT PHOTONICS
5408 NE 88th Street, Bldg E Vancouver, WA 98665

EIN/Tax ID: 912066376
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No