Resonant phase modulator

Details Resonant phase modulator Resonant phase modulator

1989-10-11

1991-03-05

Gonzalez, Frank

Coherent light generators

Particular beam control device

Modulation

350356, 372100, H01S 310

Patent

active

049982559

ABSTRACT:
Apparatus and method for modulating the phase or the amplitude of a monochromatic light beam, the apparatus including in one embodiment a Mach-Zehnder interferometer that consists of two beam splitters or beam combiners, a fully reflective mirror and an electro-optical crystal for modulation of one of two beam components. The electro-optical crystal serves as an optical resonator for the portion of the light beam admitted into the crystal material, using total internal reflection of the light beam from two or more of the crystal surfaces. The crystal has a high finesse so that a relatively small change in voltage applied across the crystal produces a large (.apprxeq.180.degree.) change in the external phase shift associated with the modulated component of the light beam. The modulated and unmodulated light beam components may be recombined for purposes of communication of information, using the mutual extinction of the two beam components when the optical phase shift between the two beam components is approximately 180.degree.. Transverse or longitudinal electro-optical materials can be used for the crystal, and the driving voltages required are less than 50 volts in some configurations. Communications at frequency up to and beyond 1 GHz. are possible.

REFERENCES:
patent: 3233108 (1966-02-01), Rosenblum
patent: 3420600 (1969-01-01), Mevers et al.
patent: 3586416 (1971-06-01), De Bitetto
patent: 4081760 (1978-03-01), Berg
patent: 4174504 (1979-11-01), Chenausky et al.
patent: 4241997 (1980-12-01), Chraplyvy
patent: 4271397 (1981-06-01), Stiles et al.
patent: 4284963 (1981-08-01), Allen, Jr. et al.
patent: 4550410 (1985-10-01), Chenausky et al.
patent: 4578793 (1986-03-01), Kane et al.
patent: 4805185 (1989-02-01), Smith
patent: 4829532 (1989-05-01), Kane
Lee, T. et al. "Light Beam Deflection with Electrooptic Prisms", IEEE Journal of Quantum Electronics, vol. QE-4, No. 7 (Jul. 1968) pp. 442-452.
Nelson, D. "The Modulation of Laser Light", Scientific American, vol. 218, No. 6 (Jun. 1968) pp. 17-23.
I. P. Kominov and E. H. Turner, Applied Optics, vol. 5 (1966), pp. 1612-1626.

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