Enhanced photosensitivity in germanosilicate fibres exposed to CO<sub>2</sub> laser radiation
We report a novel method to increase the UV photosensitivity of GeO<sub>2</sub>:SiO<sub>2</sub> optical fibers based on exposure to CO<sub>2</sub> laser irradiation before grating writing. Fibers treated with a CO<sub>2</sub> laser can produce gratings...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
1999.
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| Subjects: | |
| Online Access: | Get fulltext |
| LEADER | 01210 am a22001693u 4500 | ||
|---|---|---|---|
| 001 | 77811 | ||
| 042 | |a dc | ||
| 100 | 1 | 0 | |a Brambilla, G. |e author |
| 700 | 1 | 0 | |a Pruneri, V. |e author |
| 700 | 1 | 0 | |a Reekie, L. |e author |
| 700 | 1 | 0 | |a Payne, D.N. |e author |
| 245 | 0 | 0 | |a Enhanced photosensitivity in germanosilicate fibres exposed to CO<sub>2</sub> laser radiation |
| 260 | |c 1999. | ||
| 856 | |z Get fulltext |u https://eprints.soton.ac.uk/77811/1/1814.pdf | ||
| 520 | |a We report a novel method to increase the UV photosensitivity of GeO<sub>2</sub>:SiO<sub>2</sub> optical fibers based on exposure to CO<sub>2</sub> laser irradiation before grating writing. Fibers treated with a CO<sub>2</sub> laser can produce gratings with refractive-index modulation two times greater and a Bragg wavelength that can be 2 nm longer than those of untreated fibers. Experiments on GeO<sub>2</sub>:SiO<sub>2</sub> preform samples treated with a CO<sub>2</sub> laser in a way similar to the fibers showed a marked increase of the 242 nm absorption band, which is associated with an increase of germanium oxygen-deficient centers and is believed to be responsible for the higher photorefractive response. | ||
| 540 | |a accepted_manuscript | ||
| 655 | 7 | |a Article | |