Tunable long-period optical grating device and optical systems e

Details Tunable long-period optical grating device and optical systems e Tunable long-period optical grating device and optical systems e

1997-10-27

1999-12-07

Ngo, Hung N.

Optical waveguides

With optical coupler

Input/output coupler

385 13, G02B 634

Patent

active

059996714

ABSTRACT:
A device and method for dynamically tuning a long-period grating of an optical fiber is disclosed. The grating is made tunable by using a controlled strain imposed on the fiber adjacent the grating, wherein the strain comprises an electromechanical force, magnetostrictive force, magnetic force, or a thermally-induced force. An improved optical communication system comprising a dynamically gain-equalized amplifier device, a wavelength feedback device, and the tunable long-period grating device is also disclosed. In the communications system, the grating device is reconfigured to have a desired broadband filtering frequency, thus equalizing the amplifier gain, in response to feedback from the wavelength detector.

REFERENCES:
patent: 5682445 (1997-10-01), Smith
patent: 5699377 (1997-12-01), Pan
patent: 5706375 (1998-01-01), Mihailov et al.
patent: 5719971 (1998-02-01), Smith
patent: 5781667 (1998-07-01), Jin et al.

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