Temperature insensitive long-period fiber grating devices

Details Temperature insensitive long-period fiber grating devices Temperature insensitive long-period fiber grating devices

1996-08-01

1997-12-30

Healy, Brian

Optical waveguides

With optical coupler

Input/output coupler

385 24, 385 31, 385123, 385141, 372 6, 359130, 359341, G02B 634, H01S 330, H04J 1402

Patent

active

057039780

ABSTRACT:
Applicants have determined that the temperature sensitivity of long-period grating devices is due to differential variation with temperature of the refractive indices of the core and cladding. They have further determined that the cladding profile and fiber composition can be redesigned to substantially reduce this differential variation, thereby reducing the temperature sensitivity of long-period gratings of less than 4 nm per 100.degree. C. and preferably less than 2 nm per 100.degree. C. This design permits the use of long-period grating devices without temperature control or compensation.

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S. Kawakami et al. "Characteristics of a Doubly Clad Optical Fiber with a Low-Index Inner Cladding" IEEE Journal of Quantum Electronics, vol. QE-10, No. 12, pp. 879-887 Dec. 1974.

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