Electronically switchable multiwavelength laser system

Details Electronically switchable multiwavelength laser system Electronically switchable multiwavelength laser system

1981-12-31

1984-04-03

Sikes, William L.

Coherent light generators

Particular beam control device

Mode discrimination

372 12, 372 23, 372 26, 372 98, 350356, H01S 310

Patent

active

044411863

ABSTRACT:
An electronically switchable multiwavelength laser system comprises a lasing medium capable of generating a beam having at least two different wavelengths, an anisotropic birefringent component in optical alignment with the medium for refracting the beam into spatially separate polarized rays containing both wavelengths, and another electrically controllable anisotropic electrooptically active element, such as a Pockels' cell, having electrodes aligned with the respective rays and selectively energizable to block either ray to permit the laser to oscillate at the wavelength and polarization of the unblocked ray. The laser system includes highly reflective and partially transmissive mirrors defining the laser cavity and assisting in wavelength discrimination, the birefringent component and Pockels' cell being disposed in series between the lasing medium and the highly reflective mirror.
Another embodiment comprises a tunable laser having a continuum output over a band of wavelengths, the Pockels' cell being selectively energized with a precise voltage which enhances lasing at the selected wavelength and inhibits operation at other wavelengths.

REFERENCES:
patent: 3713032 (1973-01-01), Wentz
patent: 3719414 (1973-03-01), Wentz
patent: 3740663 (1973-06-01), Andringa
Wentz; "Electrooptical Q-Switching Technique for Randomly Polarized Laser Sources;" Proc. IEEE, Mar. 1972.

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