Laser frequency modulator for modulating a laser cavity

Details Laser frequency modulator for modulating a laser cavity Laser frequency modulator for modulating a laser cavity

1991-08-16

1992-07-21

Sikes, William L.

Coherent light generators

Particular beam control device

Modulation

372 99, 372107, H01S 310

Patent

active

051329794

ABSTRACT:
The present invention relates to a laser frequency modulator for modulating a laser cavity. It is known in the prior art to utilize a PZT (piezoelectric transducer) element in combination with a mirror to change the cavity length of a laser cavity (which changes the laser frequency). Using a PZT element to drive the mirror directly is adequate at frequencies below 10 kHz. However, in high frequency applications (100 kHz and higher) PZT elements alone do not provide a sufficient change in the cavity length.
The present invention utilizes an ultrasonic concentrator with a PZT element and mirror to provide modulation of the laser cavity. With an ultrasonic concentrator, the mirror element at the end of a laser cavity can move at larger amplitudes and higher frequencies.

REFERENCES:
patent: 3299368 (1967-01-01), Klebba
patent: 3427456 (1969-02-01), Caulfield
patent: 3449692 (1969-06-01), Haake
patent: 4691323 (1987-09-01), Ljung et al.
patent: 4947399 (1990-08-01), Sheldon
patent: 4969726 (1990-11-01), Koning
patent: 4972428 (1990-11-01), Hinz et al.

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