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Sidelobe suppression in all-fiber acousto-optic tunable filter using torsional acoustic wave

Sidelobe suppression in all-fiber acousto-optic tunable filter using torsional acoustic wave
Sidelobe suppression in all-fiber acousto-optic tunable filter using torsional acoustic wave
We propose two techniques to suppress intrinsic sidelobe spectra in all-fiber acousto-optic tunable filter using torsional acoustic wave. The techniques are based on either double-pass filter configuration or axial tailoring of mode coupling strength along an acousto-optic interaction region in a highly birefringent optical fiber. The sidelobe peak in the filter spectrum is experimentally suppressed from -8.3dB to -16.4dB by employing double-pass configuration. Axial modulation of acousto-optic coupling strength is proposed using axial variation of the fiber diameter, and the simulation results show that the maximum side peak of -9.3dB can be reduced to -22.2dB. We also discuss the possibility of further spectral shaping of the filter based on the axial tailoring of acousto-optic coupling strength.
1094-4087
12059-12064
Lee, Kwang Jo
9f3da7ff-7987-4113-972a-1c1eac169a83
Hwang, In-Kag
c06895b1-541e-4bd5-b8af-c708e8b31f77
Park, Hyun Chul
1c2268ff-9d58-4c3c-80c3-c81d3cdd99ba
Kim, Byoung Yoon
dcd7a3f9-6563-4101-b72e-da3293033dd2
Lee, Kwang Jo
9f3da7ff-7987-4113-972a-1c1eac169a83
Hwang, In-Kag
c06895b1-541e-4bd5-b8af-c708e8b31f77
Park, Hyun Chul
1c2268ff-9d58-4c3c-80c3-c81d3cdd99ba
Kim, Byoung Yoon
dcd7a3f9-6563-4101-b72e-da3293033dd2

Lee, Kwang Jo, Hwang, In-Kag, Park, Hyun Chul and Kim, Byoung Yoon (2010) Sidelobe suppression in all-fiber acousto-optic tunable filter using torsional acoustic wave. Optics Express, 18 (12), 12059-12064. (doi:10.1364/OE.18.012059).

Record type: Article

Abstract

We propose two techniques to suppress intrinsic sidelobe spectra in all-fiber acousto-optic tunable filter using torsional acoustic wave. The techniques are based on either double-pass filter configuration or axial tailoring of mode coupling strength along an acousto-optic interaction region in a highly birefringent optical fiber. The sidelobe peak in the filter spectrum is experimentally suppressed from -8.3dB to -16.4dB by employing double-pass configuration. Axial modulation of acousto-optic coupling strength is proposed using axial variation of the fiber diameter, and the simulation results show that the maximum side peak of -9.3dB can be reduced to -22.2dB. We also discuss the possibility of further spectral shaping of the filter based on the axial tailoring of acousto-optic coupling strength.

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Published date: 2010
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 357267
URI: http://eprints.soton.ac.uk/id/eprint/357267
ISSN: 1094-4087
PURE UUID: 9786cb83-9f38-4b3b-9d55-fb5a9c503392

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Date deposited: 04 Oct 2013 14:27
Last modified: 06 Sep 2019 16:31

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