Optical fiber grating devices with enhanced sensitivity cladding

Details Optical fiber grating devices with enhanced sensitivity cladding Optical fiber grating devices with enhanced sensitivity cladding

1998-09-11

2000-08-01

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Input/output coupler

385 12, 385 31, 385141, 359130, G02B 634

Patent

active

060978627

ABSTRACT:
In accordance with the invention, a reconfigurable optical fiber grating comprises an optical fiber grating with a temperature sensitive material surrounding the cladding region or incorporated into the cladding region. One or more heating elements are arranged to produce a a temperature gradient along the length of the grating and thereby chirp the grating. In a preferred embodiment, a long period fiber grating is surrounded by a material in which dn/dT is 10 times as large as that of glass and in which n is close to but lower than that of the glass. A temperature gradient along the length of the grating results in a broadening of the resonance.

REFERENCES:
patent: 5987200 (1999-11-01), Fleming et al.

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