Robust Diode Lasers for Monitoring and Measurement Technologies

Period of Performance: 01/01/2003 - 12/31/2003

$70K

Phase 1 SBIR

Recipient Firm

Vescent Photonics
14998 W 6th Ave # 700 Array
Golden, CO 80401
Principal Investigator

Abstract

Diode-laser spectroscopy has been popular for trace gas metrology of light molecules due to its high specificity. However, the spectrometers are bulky and expensive, and the laser diodes are prone to optical feedback and mode instability. These systems have been largely relegated to the laboratory where they can be operated by highly trained personnel. For industrial and field spectrometers, it is essential that the diode laser be small, robust, and exhibit single-mode tuning without intervention by trained operators. The primary impediment to a simple, single-mode tunable diode laser has been the lack of electro-optic control over the cavity length, which ensures that the number of halfwaves in the laser cavity remains constant as the laser tunes.