Cascaded Injection Locked Diode Laser Transmitter For Lidar Measurements

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NAS5-03071
Agency Tracking Number: 020055
Amount: $99,189.00
Phase: Phase I
Program: STTR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
910 Technology Blvd Suite K, Bozeman, MT, 59718
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Kevin Repasky
 () -
 repasky@physics.montana.edu
Business Contact
 Phillip Battle
Title: VP Technology
Phone: (406) 522-0388
Email: battle@advr-inc.com
Research Institution
 Montana State University
 Kevin Repasky
 Physics Dept. EPS 264
Bozeman, MT, 59717
 (406) 994-6082
 Nonprofit college or university
Abstract
A lidar laser transmitter useful for profiling of clouds, aerosols, and differential absorption measurements of atmospheric trace constituents such as carbon dioxide, water vapor, and ozone is proposed. The proposed laser transmitter is based on a master tunable external cavity diode laser (ECDL) used to injection lock a series of free running laser diodes (FRLD's). The FRDL's amplify the injected optical signal from the master ECDL so that the output of the laser transmitter maintains the tunability and narrow linewidth of the master ECDL. The amplified output signal of the laser transmitter is easily pulsed by modulating the drive current to the FRDL's. The innovative laser transmitter maintains the tunability and narrow linewidth of the master ECDL important for differential absorption lidar (DIAL) measurements while providing a pulsed amplified output. Cascading four injection locked FRDL's to a master ECDL can produce a peak power of 1W. An order of magnitude improvement in the signal to noise performance of a lidar system can be obtained using the cascaded injection locked laser transmitter compared to the state of the art pulsed flared amplifiers.

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

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