Tunable filtering device for optical communications

Details Tunable filtering device for optical communications Tunable filtering device for optical communications

1998-01-23

2000-08-29

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Particular coupling function

385 30, 385 24, 250226, G02B 626

Patent

active

061119970

ABSTRACT:
A tunable filtering device comprising a base; first and second optical fibers aligned and facing each other; a tunable filter installed on the optical path between the first and second optical fibers, for transmitting only a beam of a specific wavelength from the beam emitted from the first optical fiber toward the second optical fiber; an actuator driving the tunable filter; a beam splitter installed on the optical path between the tunable filter and the second optical fiber, for reflecting a portion of the beam transmitted through the tunable filter and transmitting the rest; an auxiliary optical fiber installed on the base, for receiving a beam reflected from the beam splitter for further transmission; and a controller detecting the beam transmitted through the auxiliary optical fiber and controlling the actuator according to the detected beam.

REFERENCES:
patent: 5646399 (1997-07-01), Fukushima et al.

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