Observation of light-induced refractive index reduction in bulk glass and application to the formation of complex waveguides
Observation of light-induced refractive index reduction in bulk glass and application to the formation of complex waveguides
We show that illuminating bulk Nd-doped Bk7 glass at 488 nm induces a decrease in refractive index of order 10-4. Using this index change we experimentally demonstrate that it is possible to use self-writing to enhance the divergence of a Gaussian beam. Here simulations with a Laguerre-Gaussian ‘donut’ writing beam show that a depressed-index ‘pipe’ structure can be created. We demonstrate that these complex waveguide structures can subsequently be used to guide light of different wavelengths.
230-235
Ljungström, A.M.
9ec0a123-e9d2-45f0-ba2c-3e95998dad39
Monro, T.M.
4f0295a8-d9ec-45a5-b72b-72908f2549bb
2002
Ljungström, A.M.
9ec0a123-e9d2-45f0-ba2c-3e95998dad39
Monro, T.M.
4f0295a8-d9ec-45a5-b72b-72908f2549bb
Ljungström, A.M. and Monro, T.M.
(2002)
Observation of light-induced refractive index reduction in bulk glass and application to the formation of complex waveguides.
Optics Express, 10 (5), .
(doi:10.1364/OE.10.000230).
Abstract
We show that illuminating bulk Nd-doped Bk7 glass at 488 nm induces a decrease in refractive index of order 10-4. Using this index change we experimentally demonstrate that it is possible to use self-writing to enhance the divergence of a Gaussian beam. Here simulations with a Laguerre-Gaussian ‘donut’ writing beam show that a depressed-index ‘pipe’ structure can be created. We demonstrate that these complex waveguide structures can subsequently be used to guide light of different wavelengths.
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Published date: 2002
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Local EPrints ID: 13786
URI: http://eprints.soton.ac.uk/id/eprint/13786
ISSN: 1094-4087
PURE UUID: a7f67c81-2f66-4862-87f1-31d4587def18
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Date deposited: 31 Dec 2004
Last modified: 15 Mar 2024 05:12
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Author:
A.M. Ljungström
Author:
T.M. Monro
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