High Powered Er:Yb Doped Fiber Laser Amplifier

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 36141
Amount: $98,955.00
Phase: Phase I
Program: SBIR
Awards Year: 1997
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Aspen Systems, Inc.
184 Cedar Hill St, Marlborough, MA, 01752
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr. Sergei Krivoshlykov
 (508) 481-5058
Business Contact
Phone: () -
Research Institution
N/A
Abstract
Aspen Systems proposes to develop a Er+3:Yb+3 doped double clad fiber laser amplifier with an output power of 10 W. The active core enclosed by a large rectangular inner cladding is end pumped with a beam from a laser diode array delivered by a bundle of rectangular core fibers preserving the brightness. This active fiber is periodically re-charged, using efficient side couplers, with a system of powerful laser diodes pigtailed to the rectangular core fibers.A new revolutionary technology of laser diode self-correction that includes enhancing the power, correcting the astigmatism, and collimating the beam results in efficient laser to fiber coupling. Moreover, a fiber polishing technique will be used for shaping the fiber end face to match the numerical aperture of the laser beam with an efficiency of 93 - 95%. The side couplers will provide coupling efficiency better than 95%.In Phase I, the concept will be demonstrated analytically and experimentally. The technologies that will be developed and fabricated are enhancing the laser beam power and quality, polishing technique to shape the fiber end face, and efficient side coupling scheme. The complete fiber laser system will be assembled and tested during the Phase II with the final product delivered to the USAF.

* information listed above is at the time of submission.

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