High-performance four-port acousto-optic frequency shifter at 1.55µm using standard single-mode telecommunications fibre


Culverhouse, D.O., Farwell, S.G., Birks, T.A., Russell, P.St.J. and Pannell, C.N. (1995) High-performance four-port acousto-optic frequency shifter at 1.55µm using standard single-mode telecommunications fibre. In, Conference on Lasers and Electro-Optics (CLEO '95), Baltimore, US, 21 - 26 May 1995.

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Description/Abstract

If a four-port fused-taper coupler is constructed from dissimilar fibers, the maximum splitting ratio can be close to zero over a broad spectral band. As previously shown, such a null coupler can be used to form an effective four-port acousto-optic frequency shifter. In Ref. 1, two dissimilar nonstandard fibers were used. Here we report the successful construction of a null coupler made by using standard telecommunications fiber. The procedure involves pretapering one of an identical pair of fibers to provide the necessary dissimilarity. In this way the device can be constructed entirely from one fiber type with four identical ports, and it can be made compatible with any existing network. Our present device used standard 125µm single-mode telecommunications fiber throughout, for operation at a wavelength of 1.55µm

Item Type: Conference or Workshop Item (Paper)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 76957
Date Deposited: 11 Mar 2010
Last Modified: 27 Mar 2014 18:56
URI: http://eprints.soton.ac.uk/id/eprint/76957

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