Optical time-division multiplexer capable of supplying stable ou

Details Optical time-division multiplexer capable of supplying stable ou Optical time-division multiplexer capable of supplying stable ou

1997-01-23

1999-06-29

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359138, 359183, H04J 1408

Patent

active

059176288

ABSTRACT:
An optical time-division multiplexer in which the phase difference between two optical signals to be used for the synthesis of an output optical signal thereof is maintained at a constant value, regardless of variations in accuracy of the manufacture thereof. Thereby, stable output optical signals are obtained at all times. The optical time-division multiplexer includes first and second optical modulators to respectively output first and second optical modulation signals synchronized with a clock signal and corresponding to different time slots, respectively; an optical coupler for performing time-division multiplexing of the first and second optical modulation signals respectively outputted by the first and second optical modulators; and an optical-phase adjusting unit to receive at least one of the first and second optical modulation signals and to regulate an optical phase of the inputted optical signal. The phase difference between the first and second optical modulation signals inputted to the optical coupler is adjusted by the optical-phase adjusting unit to a desired value to obtain a desired output optical signal.

REFERENCES:
patent: 5101450 (1992-03-01), Olshansky
patent: 5170274 (1992-12-01), Kuwata et al.
patent: 5249243 (1993-09-01), Skeie
patent: 5317443 (1994-05-01), Nishimoto
patent: 5359449 (1994-10-01), Nishimoto et al.

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