Four-port fiber frequency shifter with a null taper coupler
Four-port fiber frequency shifter with a null taper coupler
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.
1964-1966
Birks, T.A.
65bb633e-6fa2-40f7-a1c6-748bb5ca2178
Farwell, S.G.
ed617700-b4e8-4e94-bc3c-16a9d06a7d35
Russell, P.St.J.
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Pannell, C.N.
002fadf4-f97e-4732-b171-73ed7563ee18
1 December 1994
Birks, T.A.
65bb633e-6fa2-40f7-a1c6-748bb5ca2178
Farwell, S.G.
ed617700-b4e8-4e94-bc3c-16a9d06a7d35
Russell, P.St.J.
77db5e8d-8223-4806-ae60-a106619a022a
Pannell, C.N.
002fadf4-f97e-4732-b171-73ed7563ee18
Birks, T.A., Farwell, S.G., Russell, P.St.J. and Pannell, C.N.
(1994)
Four-port fiber frequency shifter with a null taper coupler.
Optics Letters, 19 (23), .
(doi:10.1364/OL.19.001964).
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.
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Published date: 1 December 1994
Identifiers
Local EPrints ID: 78246
URI: http://eprints.soton.ac.uk/id/eprint/78246
ISSN: 0146-9592
PURE UUID: cc11234f-1f3a-4b36-9530-a0dfd04c6564
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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 00:09
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Author:
T.A. Birks
Author:
S.G. Farwell
Author:
P.St.J. Russell
Author:
C.N. Pannell
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