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A study of photo-induced absorption change in germanosilicate preforms: evidence for the colour-centre model of photosensitivity

A study of photo-induced absorption change in germanosilicate preforms: evidence for the colour-centre model of photosensitivity
A study of photo-induced absorption change in germanosilicate preforms: evidence for the colour-centre model of photosensitivity
A new technique has enabled us to resolve the strong UV absorption spectrum in W-exposed germanosilicate preforms. Our results show, for the first time to our knowledge, that the large photoinduced absorption changes between 165 and 300 nm (~700 dB/mm at 195 nm has been observed) can account for ~3 x 10-4 of index change at 1.5 µm. The thermal-annealing dynamics of the photoinduced absorption changes also resemble those of fiber gratings, evidence that the color-center model of photosensitivity plays an important role in the photoinduced index changes in UV-written fiber gratings. We also find that the photoinduced absorption changes depend linearly on germania (i.e., germanium dioxide) concentrations in the preforms, and their exposure-time dependence can be fitted with a stretched-exponential function.
0003-6935
3436-3440
Dong, L.
4a30a247-d676-42ef-aaf4-061579d6d64e
Archambault, J.L.
22245ae0-fbe9-4d25-a850-f3b38c78848a
Reekie, L.
ec314137-6924-44ad-86a4-ff3f9a67c1b5
Russell, P.St.J.
77db5e8d-8223-4806-ae60-a106619a022a
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Dong, L.
4a30a247-d676-42ef-aaf4-061579d6d64e
Archambault, J.L.
22245ae0-fbe9-4d25-a850-f3b38c78848a
Reekie, L.
ec314137-6924-44ad-86a4-ff3f9a67c1b5
Russell, P.St.J.
77db5e8d-8223-4806-ae60-a106619a022a
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d

Dong, L., Archambault, J.L., Reekie, L., Russell, P.St.J. and Payne, D.N. (1995) A study of photo-induced absorption change in germanosilicate preforms: evidence for the colour-centre model of photosensitivity. Applied Optics, 34 (18), 3436-3440. (doi:10.1364/AO.34.003436).

Record type: Article

Abstract

A new technique has enabled us to resolve the strong UV absorption spectrum in W-exposed germanosilicate preforms. Our results show, for the first time to our knowledge, that the large photoinduced absorption changes between 165 and 300 nm (~700 dB/mm at 195 nm has been observed) can account for ~3 x 10-4 of index change at 1.5 µm. The thermal-annealing dynamics of the photoinduced absorption changes also resemble those of fiber gratings, evidence that the color-center model of photosensitivity plays an important role in the photoinduced index changes in UV-written fiber gratings. We also find that the photoinduced absorption changes depend linearly on germania (i.e., germanium dioxide) concentrations in the preforms, and their exposure-time dependence can be fitted with a stretched-exponential function.

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Published date: 1995

Identifiers

Local EPrints ID: 78211
URI: http://eprints.soton.ac.uk/id/eprint/78211
ISSN: 0003-6935
PURE UUID: e1f3ffc8-85d6-48d8-b3fa-404851ab7f1e

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Date deposited: 11 Mar 2010
Last modified: 14 Feb 2020 17:33

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Contributors

Author: L. Dong
Author: J.L. Archambault
Author: L. Reekie
Author: P.St.J. Russell
Author: D.N. Payne

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