Carbon dioxide laser tuning through 110 lines in 3 ms for airborne remote sensing
Journal Article
·
· Appl. Opt.; (United States)
Rapid tuning of a 3-m long glow discharge excited CO/sub 2/ laser is achieved by a rotating polygonal mirror scanning the intracavity beam across a diffraction grating. The system can tune through 110 different rotational lines spanning wavelengths from 9.2 to 11.1 atgmm in 3 ms with typical peak powers of 100--500 W at burst repetition rates up to 360 Hz and is suitable for airborne remote sensing. The effects of laser output coupler reflectance, burst rate, scan direction, and current modulation are investigated, and the performance of an optimized system for mineral reflectance measurements is presented. A reflection spectrum of a shale obtained with the rapidly tuned laser at a range of 5 m is shown to compare well to data gathered for the same sample using a slowly tuned cw CO/sub 2/ laser
- Research Organization:
- CSIRO Division of Mineral Process Engineering, Sutherland NSW 2232, Australia
- OSTI ID:
- 5353524
- Journal Information:
- Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 27:5; ISSN APOPA
- Country of Publication:
- United States
- Language:
- English
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