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Passively Q Switched Laser

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68936-16-C-0002
Agency Tracking Number: N152-089-0355
Amount: $84,923.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: N152-089
Solicitation Number: 2015.2
Solicitation Year: 2015
Award Year: 2016
Award Start Date (Proposal Award Date): 2015-10-24
Award End Date (Contract End Date): 2016-04-23
Small Business Information
6300 Gateway Dr.
Cypress, CA 90630
United States
DUNS: 614108918
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Nathan Zameroski
 (719) 302-3117
Business Contact
 Ruth Craig
Phone: (714) 224-4410
Research Institution

Scientific Applications and Research Associations (SARA) proposes an R&D program to develop a passively Q-switched Tm:YLF laser using Cr:Zn:Se, Cr:Zn:S, Co:Zn:S, or Co:Zn:S as the solid state saturable absorber. Passive Q-switching reduces cost, weight, volume, eliminates bulky electro-optical active Q-switches and associated electronics, and simplifies resonator design. Passively Q-switched lasers are compact, ruggedized, reliable, packaged to withstand the shock, vibration, pressure, temperature changes, and have nearly diffraction limited beams. The gain crystal, Q-switch, and resonator mirrors can be integrated onto a monolithic device. High average power (>11 W) passively Q-switched Nd:YVO4 lasers using Cr+4:YAG saturable absorber have been demonstrated but pulse energy and repetition rate were ~ 60 J at 190 kHz because of the fast 4 s lifetime of the saturated transition in Cr+4:YAG. However, both Co:Zn:S, and Co:Zn:Se have saturated transition lifetimes ~ 200 to 300 s at 295 K and lifetimes increase to ~ 600 to 800 s at 250 K. This may permit temperature tuning of repetition rate and open up the possibility to CW pumped, high energy (mJ range), high average power passive Q-switching at sub-kHz repetition rates. Benefits of funding include publishing research and commercial applications such as laser scalpels, LIDAR, and pollution monitoring.

* Information listed above is at the time of submission. *

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