Ultrasonic tunable laser

Details Ultrasonic tunable laser Ultrasonic tunable laser

2005-05-24

2005-05-24

Lee, Wilson (Department: 2828)

Coherent light generators

Particular beam control device

Tuning

C372S013000, C372S023000, C372S028000

Reexamination Certificate

active

06898217

ABSTRACT:
A tunable laser device produces a laser energy over a range of frequencies. A property of an ultrasonic transducer or, more specifically, the frequency of an ultrasonic wave created by the ultrasonic transducer is altered to change the laser frequency of the tunable laser device. The ultrasonic transducer may couple its ultrasonic wave directly into the laser source or may form a tunable acousto-optic modulator external to the laser source. In both cases, the ultrasonic wave creates an index of refraction perturbation in an optical substrate, through which the laser energy of the laser source passes. Changes in the ultrasonic wave cause changes in the perturbation through which the laser energy passes, which in turn, changes the frequency of the laser energy, thereby enabling the frequency of the laser to be tuned.

REFERENCES:
patent: 3906393 (1975-09-01), Fletcher et al.
patent: 4532632 (1985-07-01), Yamashita et al.
patent: 5197074 (1993-03-01), Emmons et al.
patent: 5384799 (1995-01-01), Osterwalder

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