Optical waveguides – With optical coupler – Switch
Patent
1991-07-08
1992-05-26
Healy, Brian
Optical waveguides
With optical coupler
Switch
385 27, 385 40, 356345, 356351, 25022719, 372 25, 372 29, 372 38, G02B 610, G01B 902, H01J 516, H01S 300
Patent
active
051174715
ABSTRACT:
In an optical switching arrangement comprising a laser, an electrooptical phase modulator formed as a two-arm interferometer, and a second two-arm interferometer as a multistable element, the second interferometer is formed with interferometer arms having optical pathlength differences of the order of magnitude of 10.sup.4 times the wavelength of the light from the laser and has at least one signal output arranged parallel to a further output; the further output is connected to a photodiode the output voltage of which is amplified and then used to control the current supply of the laser. The wavelength of the light emitted by the laser is variable by changing the control voltage of the modulator or the bias voltage of the current supply of the laser so that the output signal alternates between two stable interference signals.
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Cross et al., "Optically Controlled Two Channel Integrated-Optical Switch" IEEE Journal of Quantum Electronics, vol. QE-14, No. 8, Aug. 1978.
Deutsche Forschungsanstalt fur Luft - und Raumfahrt e.V.
Healy Brian
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