Light beam frequency comb generator

Details Light beam frequency comb generator Light beam frequency comb generator

1991-05-22

1992-11-24

LaRoche, Eugene R.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359306, 359307, G02F 111, G02F 133

Patent

active

051668220

ABSTRACT:
A light beam frequency comb generator uses an acousto-optic modulator to generate a plurality of light beams with frequencies which are uniformly separated and possess common noise and drift characteristics. A well collimated monochromatic input light beam is passed through this modulator to produce a set of both frequency shifted and unshifted optical beams. An optical system directs one or more frequency shifted beams along a path which is parallel to the path of the input light beam such that the frequency shifted beams are made incident on the modulator proximate to but separated from the point of incidence of the input light beam. After the beam is thus returned to and passed through the modulator repeatedly, a plurality of mutually parallel beams are generated which are frequency-shifted different numbers of times and possess common noise and drift characteristics.

REFERENCES:
patent: 4000939 (1977-01-01), McNaney
patent: 4443066 (1984-04-01), Freyre
patent: 4456338 (1984-06-01), Gelbart
patent: 4586184 (1986-04-01), Hess
patent: 4697888 (1987-10-01), Schmadel, Jr. et al.

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