Article comprising a temperature compensated optical fiber refractive index grating
First Claim
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1. An article comprising an optical fiber with a refractive index grating having a length and a reflection wavelength λ
- at a given temperature within an operating temperature range;
wherein the optical fiber is attached to a support member, said support member having a negative coefficient of thermal expansion selected such that λ
is substantially temperature independent over said operating temperature range.
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Abstract
Conventional optical gratings are relatively temperature sensitive. This sensitivity is generally undesirable but can be reduced or eliminated by attaching the grating to a support member having a negative coefficient of thermal expansion. Exemplarily the member comprises Zr-tungstate and/or Hf-tungstate. The thermal expansion can be tailored by admixture of positive expansion coefficient material (e.g., Al2 O3, SiO2) to the negative expansion coefficient material (e.g., ZrW2 O8), or by a variety of other techniques.
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Citations
13 Claims
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1. An article comprising an optical fiber with a refractive index grating having a length and a reflection wavelength λ
- at a given temperature within an operating temperature range;
wherein the optical fiber is attached to a support member, said support member having a negative coefficient of thermal expansion selected such that λ
is substantially temperature independent over said operating temperature range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- at a given temperature within an operating temperature range;
Specification