Wavelength and bandwidth tunable optical system

Details Wavelength and bandwidth tunable optical system Wavelength and bandwidth tunable optical system

1996-08-26

1998-11-24

Palmer, Phant H.

Optical waveguides

With optical coupler

Plural

385 27, 385 37, 385 46, 359127, 359130, G02B 628

Patent

active

058419187

ABSTRACT:
A system for modifying an input optical signal by reducing its bandwidth and modifying its central wavelength has an optical circulator with at least three ports and at least two optical filters coupled to consecutive ports of the circulator. The first filter produces a predetermined reflected band off the input optical signal. The second filter produces a predetermined transmission band as a part of the reflected band. Either or both of the optical filters are tunable to shape and trim the input signal in a predetermined manner. A multi-channel and cascade configurations may be formed. The system may serve e.g. as a tunable filter or as an add/drop module in WDM communication networks.

REFERENCES:
patent: 5446809 (1995-08-01), Fritz et al.
patent: 5608825 (1997-03-01), Ip
Tuning and Chirping Fiber Bragg Gratings by Deep Etchings; L. Dong; J.L. Cruz; L. Reekie; J.L. Archambault. IEEE Photonics Technology Letters, vol. 7, No. 12, Dec. 1995.

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