Wavelength selector for tunable laser
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United States of America Patent
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Oct 21, 1980
Grant Date -
N/A
app pub date -
Jul 3, 1978
filing date -
Oct 21, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wavelength selector for use in a laser cavity comprising a diffraction grating mounted at an angle near grazing incidence with respect to the beam travelling away from the excited medium and a reflector which reflects the beam diffracted by the grating back along its incidence path. Wavelength tuning is accomplished by rorating this reflector, while the grating remains fixed. Rotation of the grating provides linewidth variation. FIELD OF THE INVENTION The present invention relates generally to a new improvement in mounting a diffraction grating in optical systems, and more particularly to the applicability of this improvement for use in a laser cavity. The invention is envisaged as being applicable to dye lasers, high-pressure gas lasers, semiconductor diode lasers, and in general any type of laser which may be frequency-tuned by an external cavity. It is also applicable, mutatis mutandis, for use in spectrometers and parametric devices.
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