Optical waveguide device
First Claim
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1. An optical waveguide device comprising:
- an optical waveguide formed at least in part of photosensitive optical glass; and
a refractive index variation optically impressed on the photosensitive optical glass of the waveguide by exposure of regions of the photosensitive optical glass to a refractive index-varying optical radiation,characterised in that the photosensitive optical glass is doped with tin as a photosensitising dopant.
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Abstract
Tin-doped photosensitive optical glass is disclosed, together with applications of the glass in fabricating waveguides and waveguide devices such as Bragg gratings.
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Citations
21 Claims
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1. An optical waveguide device comprising:
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an optical waveguide formed at least in part of photosensitive optical glass; and a refractive index variation optically impressed on the photosensitive optical glass of the waveguide by exposure of regions of the photosensitive optical glass to a refractive index-varying optical radiation, characterised in that the photosensitive optical glass is doped with tin as a photosensitising dopant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of fabricating an optical waveguide, the method comprising the steps of:
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providing a photosensitive optical glass which has been doped with tin as a photosensitizing dopant; and exposing regions of the tin-doped photosensitive optical glass to refractive index change-inducing optical radiation, the exposed regions providing a light-guiding core of raised refractive index within the tin-doped photosensitive optical glass. - View Dependent Claims (20)
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21. A process for increasing the sensitivity of optical glass to light-induced refractive index variation, the process comprising the steps of:
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doping the optical glass with tin for increasing the sensitivity of the optical glass to light-induced refractive index variation; and exposing regions of the tin-doped photosensitive optical glass to refractive index-varying optical radiation to vary the refractive index of the exposed regions of the tin-doped photosensitive optical glass.
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Specification