| 摘要 |
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.
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