Optical modulators as monolithically integrated optical isolator

Details Optical modulators as monolithically integrated optical isolator Optical modulators as monolithically integrated optical isolator

1993-11-02

1997-09-02

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359163, 359180, 385 14, H04B 1004

Patent

active

056638248

ABSTRACT:
An apparatus and technique for providing isolation for a signal source utilizing two or more modulators is described. In particular, the apparatus generates a timed sequence of "open gates" that are synchronized to the data signal which permit transmission in a forward direction, and which attenuate a reverse direction signal. Another embodiment attenuates primarily reflected light signals by utilizing a passive waveguide and a modulator. The passive waveguide provides a propagation delay such that signals reflected from its end facet are attenuated by the modulator. The apparatus is suitable for use as an isolator for a light source in a high-speed optical fiber data transmission system.

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