Methods of and apparatus for providing frequency modulated light

Details Methods of and apparatus for providing frequency modulated light Methods of and apparatus for providing frequency modulated light

1982-09-30

1988-05-17

Sikes, William L.

Communications, electrical: acoustic wave systems and devices

Borehole testing

350358, 350 9629, 350 9610, 367140, G02B 600, G02B 636, G02B 602, H04R 1700

Patent

active

047446250

ABSTRACT:
Frequency modulated light is provided to an optical fiber by exciting a laser medium, such as a diode laser, so that stimulated emitted radiation, at a fixed wavelength .lambda., emanates from opposite surfaces of the medium. One end of the fiber is coupled to one of the surfaces. A reflecting medium is provided a distance (n.lambda.)/4 away from the other of the surfaces (n being a positive integer) to reflect emanated radiation from the other surface back to the other surface. The reflecting medium is oscillated in accordance with a signal to be modulated. The radiation reflected back to the other surface tends to cancel or reinforce, respectively, the radiation that emanates from the one surface, when n is an odd integer or an even integer, respectively. The reflecting medium can be a light reflecting diaphragm adapted to be acoustically oscillated.

REFERENCES:
patent: 3243722 (1966-03-01), Billings
patent: 3379887 (1968-04-01), Stephany
patent: 3434776 (1969-03-01), Kern
patent: 3590681 (1971-07-01), Cross
patent: 3700900 (1972-10-01), Herleikson
patent: 3705992 (1972-12-01), Ippen et al.
patent: 3800906 (1974-04-01), Albares
patent: 3982817 (1976-09-01), Feichtner
patent: 4105915 (1978-04-01), Clay et al.
patent: 4236243 (1980-11-01), Davies et al.
patent: 4310905 (1982-01-01), Palmer
patent: 4320475 (1982-03-01), Leclerc et al.
patent: 4363114 (1982-12-01), Bucaro et al.

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