An acousto-optical spectrometer with a visible laser diode source

Details An acousto-optical spectrometer with a visible laser diode source An acousto-optical spectrometer with a visible laser diode source

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ijimw..12.1493s&link_type=abstract

International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 12, Dec. 1991, p. 1493-1498.

Computer Science

Sound

1

Acousto-Optics, Bragg Cells, Laser Spectrometers, Lithium Niobates, Semiconductor Lasers, Visible Spectrum, Astronomy, Crystal Optics, Sound Waves

Scientific paper

The fabrication and properties of an acoustooptical spectrometer (AOS) are described as part of a feasibility study of a visible laser diode for applications associated with the more stable IR lasers. The AOS is developed with a single-mode visible-laser diode that operates at 670 nm and an LiNbO3 longitudinal-mode Bragg cell. The theoretical advantages of using a visible laser diode include increased bandwidth, a larger number of resolvable frequencies, and an increase in the diffraction efficiency. The AOS is tested by observing astronomical sources, and the reported noise level is reduced for integration times of up to 15 s. The visible laser diode is concluded to work as well as an IR laser diode and can be integrated into AOSs, and the advantages to such substitution reflect theoretical predictions.

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