Laser light source device

Details Laser light source device Laser light source device

1984-09-26

1987-01-13

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Modulation

372 9, 372 37, 372 23, 372 64, 372 97, H01S 310

Patent

active

046370277

ABSTRACT:
Disclosed is a laser light source device having a laser and an external resonator, wherein as a base, a Faraday rotator is provided at the laser side front of a reflection plane of the resonator so that clockwise and counter-clockwise circular polarizations which have frequencies slightly different to each other are generated, and if a laser such as a semiconductor laser having an eigen-mode having a linear polarization is applied, elements which rotate a polarization by 90 degrees by one emission-and-return through the element, for example, quarter-wave plates, are arranged, The device does not need a strong magnetic field or a strong electric field, and can easily generate lights which are a constant strength. Thus the device can be miniaturized and a high efficiency obtained.

REFERENCES:
patent: 3356438 (1967-12-01), Macek et al.
patent: 3436677 (1969-04-01), Max et al.
patent: 3639855 (1972-02-01), Dillon, Jr. et al.
patent: 4305046 (1981-12-01), Le Floch et al.
patent: 4496518 (1985-01-01), Marie

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