Nonlinear optical apparatus using fabry-perot resonators

Details Nonlinear optical apparatus using fabry-perot resonators Nonlinear optical apparatus using fabry-perot resonators

1978-08-28

1980-09-09

Sikes, William L.

Oscillators

Relaxation oscillators

331 945S, 356352, G02F 103

Patent

active

042214726

ABSTRACT:
An optical apparatus which provides a nonlinear characteristic between input and output amplitude levels is disclosed. A single frequency linearly polarized single mode light beam having amplitude variations that are to be acted upon is coupled to a Fabry-Perot interferometer (10) having two mirrored ends (11 and 12) and substantially filled with an electrooptic material (13) having electrodes (14 and 15). A beam splitter (21) is positioned and oriented so as to deflect optical energy that is reflected from the cavity into a photodetector circuit (22 and 23) whose output voltage is applied to the electrodes of the electrooptic material. Adjustment of the cavity length provides a wide range of nonlinear characteristics including some that permit the apparatus to be used as a bistable memory element and others which permit the device to be used as a clipper for all input power levels below a predetermined threshold level.

REFERENCES:
patent: 3243722 (1966-03-01), Billings
Smith et al., Nonlinear Electro-Optic Fabry-Perot Devices Using Reflected Light Feedback, Optics Letters vol. 2, No. 3 (Mar. 1978), pp. 55-57.
Smith et al., Electro-Optic Nonlinear Fabry-Perot Devices, IEEE J., Quant. Electr. vol. QE-14, No. 3 (Mar. 1978), pp. 207-212.
Smith et al., A Bistable Fabry-Perot Resonator, Applied Phys. Lett. vol. 30, No. 6 (Mar. 15, 1977), pp. 280-281.

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