Optical modulators

Details Optical modulators Optical modulators

1979-06-04

1981-12-29

Corbin, John K.

350 9615, G02B 514

Patent

active

043079377

ABSTRACT:
An optical modulator has two closely spaced optical fibre end surfaces, the optical path length between which can be altered in response to an applied modulating signal. Light is partially reflected from the two surfaces, the two beams interfering according to their phase difference. Alternatively the modulator may be operated in a transmissive mode. To obtain modulation either the refractive index of material between the fibre end surfaces is altered or one of the fibres is longitudinally vibrated. A method of operating a modulator in a wavelength selective mode is also described.

REFERENCES:
patent: 3166673 (1965-01-01), Vickery et al.
patent: 3466565 (1969-09-01), Rigrod
patent: 3619032 (1971-11-01), Reizman
patent: 3775699 (1973-11-01), Cassels
patent: 4053764 (1977-10-01), Sierak et al.

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