Long-period fiber grating devices packaged for temperature stabi

Details Long-period fiber grating devices packaged for temperature stabi Long-period fiber grating devices packaged for temperature stabi

1996-09-06

1998-05-26

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

385 37, G02B 634, H01S 300

Patent

active

057575401

ABSTRACT:
The present applicants have discovered that one can fabricate a long-period grating wherein the grating peak wavelength .lambda..sub.p will be shifted in different directions when the grating is subject to temperature and tensile strain, respectively. Accordingly, a long-period grating can be designed and packaged such that a temperature-induced shift in .lambda..sub.p is compensated by a corresponding strain-induced shift arising from a single packaging material. Thus, by proper design of the grating and choice of the packaging material expansion coefficient, a temperature stable grating having temperature sensitivity of less than 4 nm per 100.degree. C. can comprise a grating fiber encased in or attached to a package comprising a single material such as glass, polymer or metal. Such designs permit the use of long-period grating devices without temperature control.

REFERENCES:
patent: 5042898 (1991-08-01), Morey et al.
patent: 5430817 (1995-07-01), Vengsarkar
patent: 5613023 (1997-03-01), Guillon et al.
patent: 5647039 (1997-07-01), Judkins et al.

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