Multifrequency, rapidly sequenced or simultaneous tunable laser

Details Multifrequency, rapidly sequenced or simultaneous tunable laser Multifrequency, rapidly sequenced or simultaneous tunable laser

1992-10-26

1994-01-04

Lee, John D.

Coherent light generators

Particular beam control device

Tuning

372 23, H01S 3106

Patent

active

052766950

ABSTRACT:
A tunable solid state laser produces a laser emission at one or more wavelengths simultaneously. The tunable solid state laser includes a laser resonator defined by an output coupler reflective element, two fold mirrors, and one or more high reflectivity end elements to form a reflective path in a laser resonator cavity therebetween with a laser crystal disposed in the laser resonator cavity. A means for optically exciting the laser crystal is appropriately disposed for end pumping the laser crystal to produce a laser emission in a predetermined range of wavelengths. A wavelength dispersing element such as a prism is disposed in the laser resonator cavity between one of the fold mirrors and the high reflectivity end elements for tuning the laser emission at one or more of the desired wavelengths in the predetermined range of wavelengths, the dispersing element being transparent to the laser emission over the predetermined range of wavelengths. Wavelength tuning of each wavelength can be accomplished by a simple angular rotation of the appropriate high reflectivity end element. The tunable solid state laser can further include a plurality of birefringent optical plates oriented at Brewster's angle in the reflective path in the laser resonator cavity or line-narrowing etalons, or optical shutters, Q-switches or other optical elements.

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