Four-port fibre frequency-shifter with a null taper coupler
Birks, T.A., Farwell, S.G., Russell, P.St.J. and Pannell, C.N. (1994) Four-port fibre frequency-shifter with a null taper coupler. Optics Letters, 19, (23), 1964-1966. (doi:10.1364/OL.19.001964).
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Description/Abstract
A prototype of a new design of fiber frequency shifter, based on a special four-port fused taper coupler with a null maximum coupling ratio, is reported. In this coupler the constituent fibers are so dissimilar that the maximum coupling is (ideally) zero. In the presence of a flexural acoustic wave, light is coupled between the fibers, acquiring a frequency shift in the process. Near 100% conversion with 30-dB sideband and carrier suppression is achieved, in an unoptimized device, for just 1 mW of electrical drive power.
| Item Type: | Article |
|---|---|
| ISSNs: | 0146-9592 (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: | 78246 |
| Date Deposited: | 11 Mar 2010 |
| Last Modified: | 02 Mar 2012 13:02 |
| Contributors: | Birks, T.A. (Author) Farwell, S.G. (Author) Russell, P.St.J. (Author) Pannell, C.N. (Author) |
| Date: | 1994 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/78246 |
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