Efficient erbium-doped fibre amplifiers incorporating an optical isolator
Zervas, M.N., Laming, R.I. and Payne, D.N. (1995) Efficient erbium-doped fibre amplifiers incorporating an optical isolator. IEEE Journal of Quantum Electronics, 31, (3), 472-80. (doi:10.1109/3.364402).
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Description/Abstract
A composite-EDFA configuration which incorporates an optical isolator has been investigated theoretically and experimentally. The isolator prevents the build-up of the backward-ASE and results in an amplifier with high gain and near-quantum-limited noise figure (NF). The optimum position of the isolator has been calculated as a function of the pump power so that minimum NF and maximum gain are achieved simultaneously. It is shown that under practical pump powers, the optimized composite EDFA exhibits a gain improvement of about 5 dB and a NF reduction in excess of 1.5 dB when compared with an optimized conventional EDFA. It is also shown that with further optimization the composite EDFA can be employed in a practical fiber link as a pre-amplifier without the use of an input isolator. Finally, a high-gain composite EDFA has been experimentally demonstrated which exhibits a gain of 51 dB (54 dB) and NF of 3.1 dB for only 435 mW (93 mW) of pump power.
| Item Type: | Article |
|---|---|
| ISSNs: | 0018-9197 (print) |
| Related URLs: | |
| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | University Structure - Pre August 2011 > Optoelectronics Research Centre |
| Item ID: | 78278 |
| Date Deposited: | 11 Mar 2010 |
| Last Modified: | 02 Mar 2012 11:23 |
| Contributors: | Zervas, M.N. (Author) Laming, R.I. (Author) Payne, D.N. (Author) |
| Date: | 1995 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/78278 |
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