System comprising a laser diode and means for stabilizing the wa

Details System comprising a laser diode and means for stabilizing the wa System comprising a laser diode and means for stabilizing the wa

1993-03-30

1994-04-19

Epps, Georgia Y.

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 32, 356345, 356349, 356351, 356352, H01S 313

Patent

active

053053303

ABSTRACT:
In a system comprising a laser diode and means for stabilizing the wavelength of a primary beam of light emitted by said laser diode said means comprise a controller for controlling the current supplied to the laser diode under the control of sensor means, which are responsive to the instantaneous ambient conditions and operating parameters, a beam splitter, which is disposed in the path of said primary beam and arranged to divert from said primary beam a partial beam to measuring means, which comprise a diffraction grating and associated focusing optical means and are arranged to direct said partial beam onto photodetector means and to form on said photodetector means a light spot having a position and/or size depending on the instantaneous wavelength of said primary beam. The photodetector means serve to detect deviations of the light spot from a desired position, which is associated with the rated wavelength of said primary beam. The output signals of said photodetector means are optionally converted and are used as control signals for the controller. A laser interferometer is also disclosed, in which the polarization of the primary beam is used in the generation of the measured-value signals.

REFERENCES:
patent: 4824251 (1989-04-01), Slotwinski et al.
patent: 4862467 (1989-08-01), Carter et al.
patent: 5127731 (1992-07-01), DeGroot
patent: 5172185 (1992-12-01), Leuchs et al.
patent: 5179424 (1993-01-01), Lequime et al.

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