INTELLIGENT DRIVERS USING OPTICAL SENSING

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$749,779.00
Award Year:
2008
Program:
STTR
Phase:
Phase II
Contract:
W31P4Q-08-C-0328
Award Id:
77888
Agency Tracking Number:
06ST1-0082
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
15 WARD STREET, SOMERVILLE, MA, 02143
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
106771140
Principal Investigator:
Michael Booth
PI
(617) 547-1122
mbooth@srl.com
Business Contact:
Jonah Jacob
President
(617) 547-1122
jjacob@srl.com
Research Institution:
PENN STATE
KEVIN WHITE
ELECTRO-OPTICS CENTER
222 NORTHPOINTS BLVD
FREEPORT, PA, 16229
(724) 295-7019
Nonprofit college or university
Abstract
The development of a practical, easily-implemented device that can extend the lifetimes of existing diode lasers would lead to extended service and lower costs and cost-of-ownership. Such a device extends the lifetimes of diode lasers by shutting off the supply current when formation of a potentially damaging current filament appears likely. This allows the diode to return to its initial state with no memory of filamentation. We have artificially generated optical transients by applying current pulses atop the normal, regulated drive currents of laser diodes to observe the result of such aberrant behavior of the laser's properties and lifetime. We have studied the optical and electrical behavior to correlate excursions in both that indicate performance-degrading faults. The plan is to use such optical transients as predictors of potentially damaging faults, and to use this to trigger a protection circuit that will shut down the drive current for a short time and allow the diode to return to a safe state before resuming operation. The optically-triggered protection circuit combined with a constant current supply will then be tested on LDAs to demonstrate that it increases the working lifetime of off-the-shelf laser diodes.

* information listed above is at the time of submission.

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