Fiber grating package

Details Fiber grating package Fiber grating package

1997-03-18

1998-11-24

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

G02B 634

Patent

active

058419209

ABSTRACT:
A temperature compensating optical waveguide device including an optical fiber in which a grating formed of grating elements embedded within the fiber core reflects fiber-transmitted light within a range about a central wavelength that varies with temperature and with an axial strain applied to the grating. A top surface of a compensating member is affixed to a portion of the fiber that includes the grating and a tension adjusting member is connected to the compensating member. The tension adjusting member and the compensating member are formed of materials selected so that as the temperature of the device decreases, the tension adjusting member contracts more than the compensating member so as to control the deformation of the compensating member and thereby impose an axial strain on the grating. The controlled application of tensile stress to the optical fiber in the region of the grating causes changes in the central wavelength of reflected light to compensate for central wavelength variations resulting from changes in the grating temperature.

REFERENCES:
patent: 4725110 (1988-02-01), Glenn et al.
patent: 5042898 (1991-08-01), Morey et al.
patent: 5367589 (1994-11-01), MacDonald et al.
patent: 5694503 (1997-12-01), Fleming et al.

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