Laser resonator cavities with wavelength tuning arrangements

Details Laser resonator cavities with wavelength tuning arrangements Laser resonator cavities with wavelength tuning arrangements

1979-05-14

1981-09-01

Sikes, William L.

Oscillators

Molecular or particle resonant type

331 945M, H01S 310

Patent

active

042874866

ABSTRACT:
Novel laser resonator cavities and laser wavelength tuning arrangements are disclosed. A pair of similar spectral dispersion means achieve in the resonator both a colinear region for rays of different wavelengths and a region in which rays of different wavelengths coextend separated and substantially parallel. Amplifying medium in an optical cavity following at least a first dispersion means, preferably in the parallel region of a laser having paired dispersion means, enable amplification at the different wavelengths while limiting their coupling via the amplifying medium. One or a number of apertures disposed in a dispersed path within a laser cavity are positioned to transmit a selected ray or rays and to block rays of unwanted wavelength whereby laser oscillation wavelength is determined. The above features are variously combined to achieve colinear output beams of various wavelengths and injection-type control of laser oscillation. Variable reflecting optics, e.g., a rotary mirror in a dispersed path, preferably in the near-parallel region of a laser having paired dispersion means, select different dispersed rays for reflection, enabling, e.g., rapid frequency scanning in a colinear output beam.

REFERENCES:
patent: 3675154 (1972-07-01), Duguay et al.
patent: 3766488 (1973-10-01), Kohn
patent: 3774121 (1973-11-01), Ashkin et al.

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