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Frequency Doubler for CO2 Laser ITER Diagnostics

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-08ER85208
Agency Tracking Number: N/A
Amount: $749,935.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Solicitation Year: N/A
Award Year: 2009
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): 2012-08-14
Small Business Information
20 New England Business Center
Andover, MA 01810
United States
DUNS: 073800062
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 David Fenner
 (978) 689-0003
Business Contact
 David Green
Title: Dr.
Phone: (978) 689-0003
Research Institution

In order to meet the objectives of the U.S. contribution toward diagnostics on the ITER fusion reactor, which is being built by an international team, the CO2 laser frequency doubler must achieve a significantly higher conversion efficiency, in order to enable very low noise operation of the sensing interferometer. This project will develop nonlinear optical (NLO) orientation-patterned gallium arsenide (OP-GaAs) crystals for high-efficiency doubling of CO2 lasers. Phase I successfully fabricated OP-GaAs crystals of very high transparency in the long-wave IR and demonstrated the potential for scale-up to larger sizes with higher efficiencies for CO2 laser second harmonic generation (SHG). The concept was demonstrated by converting a 1 W CO2 laser beam from ¿ ~10.6 µm to the second harmonic at ¿ ~5.3 µm. Phase II will scale-up NLO OP-GaAs crystals and demonstrate SHG conversion efficiency (¿) for a 50 W laser. The objective is to attain ¿ >2%, which would be a one-hundred-fold improvement over existing frequency doublers. Then, an optical interferometer instrument system will be designed and constructed, including the OP-GaAs, and the instrument will be tested in a DIII-D fusion reactor. Commercial Applications and other Benefits as described by the awardee: NLO OP-GaAs components should find use in markets for frequency-converter optical devices, including those with second harmonic generation, optical parametric generation, and similar functionality. NLO OP-GaAs for laser conversion also should see market demand within optical systems for DOD applications and for DOE applications such as diagnostic tools for plasma fusion reactors

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

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