Distributed optical fibre sensing at 1.65µm using a Q-switched fibre laser
Kee, H H, Lees, G P and Newson, T P (2000) Distributed optical fibre sensing at 1.65µm using a Q-switched fibre laser. In, ISAP 2000, Glasgow, 22 - 24 May 2000.
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Description/Abstract
It is becoming increasingly vital to monitor telecommunication links during operation and installation process. By using a high peak power source and the optical time domain reflectometry (OTDR) technique operating at the wavelength region of 1.6μm, it is possible to monitor conventional C-band Erbium-doped fibre amplifier (EDFA) systems whilst transmitting data, and to characterise losses at the higher wavelengths of extended bandwidth systems designed around the L-band EDFA systems. We describe a compact design based on Raman shifting the output of an Erbium-doped Q-switched fibre laser operating at 1.5μm for obtaining a pulsed source at 1.6μm. This source was used for an OTDR measurement and also as a source for a 1.65μm Raman-based distributed temperature sensor, in contrast to distributed temperature sensors normally operating at 1.5μm. OTDR measurements at 1.65μm provide more accurate determination of macro and micro-bend losses than at 1.5μm as such losses increase with wavelength. The temperature measurement extracted from the anti-Stokes Raman signal at 1.5μm was made over a sensing range of 10.1km, with a spatial resolution of 10m and temperature resolution of 4°C.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Additional Information: | 4074-35 Event Dates: 22-24 May 2000 Organisation: ISAP 2000 Glasgow, 22-24 May 2000, 4074-35 |
| Related URLs: | |
| Divisions: | Faculty of Physical and Applied Science > Optoelectronics Research Centre |
| Item ID: | 254601 |
| Date Deposited: | 02 Apr 2001 |
| Last Modified: | 21 Jan 2013 13:57 |
| Contributors: | Kee, H H (Author) Lees, G P (Author) Newson, T P (Author) |
| Date: | 2000 |
| Additional Information: | 4074-35 Event Dates: 22-24 May 2000 Organisation: ISAP 2000 Glasgow, 22-24 May 2000, 4074-35 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/254601 |
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