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Object Oriented PIC codes with Upgraded Physics and Platfor

Award Information

Department of Defense
Air Force
Award ID:
Program Year/Program:
1998 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Tech-X Corporation
5621 Arapahoe Ave, Suite A Boulder, CO -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 1998
Title: Object Oriented PIC codes with Upgraded Physics and Platfor
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $99,998.00


A novel technique for the processing of c-dopcd Yb-Er optical fiber cladding pumped lasers will be explored. If high power at 1550 nm is desired, it is advantageous to pump a c-dopcd Yb-Er fiber laser at 915 nm where there is a broad energy absorption band for Yb.. This energy is then resonantly transferred to the erbium co-dopant that provides the gain medium. in order to prevent back transfer from the excited Er to the ground state Yb. a rapid dc-excitation of the Er from this resonant level to the upper lasing level of the Er is required. This occurs most efficiently in a glass with a high phonon energy, i.e., a glass containing at least 10 mol % of ?205. Such a multicomponent silicate glass can be obtained through solution doping. or through the heating of a rare earth halide to provide a source the rare earth cations. However, these processing techniques can be problematic with regard to maintaining both high phosphorous levels and high rare earth content. A novel design of a high numerical aperture fiber has been proposed and realized. This is an all glass structure that avoids the possibility of any of the high power diode pump radiation interaction with polymeric coating material. In addition, multi-core fibers will be investigated by appropriate machining of preforms

Principal Investigator:

David Bruhwiler

Business Contact:

John Cary
Small Business Information at Submission:

Tech-X Corp.
1280 28th Street Suite 2 Boulder, CO 80303

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
University of California
336 Sproul Hall
Berkeley, CA 94705
Contact: Marion Lentz
RI Type: Nonprofit college or university