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Characterization of fiber DFB lasers via an index perturbation method

Characterization of fiber DFB lasers via an index perturbation method
Characterization of fiber DFB lasers via an index perturbation method
We demonstrate the characterization of fiber distributed-feedback lasers by scanning a heat-induced index perturbation along the cavity and by measuring the induced laser frequency shift. The measured shift is shown to be a good indicator for the intensity distribution in the cavity, and the experimental results reveal that the sensitivity of fiber distributed-feedback laser sensors with frequency readout is highly localized near the grating phase-shift position. Use of the characterization data to determine the grating coupling parameter K, the polarization dependence of K, and birefringence nonuniformities as well as for identification of the order of longitudinal mode operation are discussed and demonstrated experimentally. Asymmetrically phase-shifted lasers with highly directional output are also investigated.
0003-6935
4558-4564
Ronnekleiv, E.
3c7032fb-6788-46bb-9783-8ead07c06e7b
Ibsen, M.
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Laming, R.I.
c86f359b-9145-4148-bc7d-ae4f3d272ca2
Ronnekleiv, E.
3c7032fb-6788-46bb-9783-8ead07c06e7b
Ibsen, M.
22e58138-5ce9-4bed-87e1-735c91f8f3b9
Zervas, M.N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Laming, R.I.
c86f359b-9145-4148-bc7d-ae4f3d272ca2

Ronnekleiv, E., Ibsen, M., Zervas, M.N. and Laming, R.I. (1999) Characterization of fiber DFB lasers via an index perturbation method. Applied Optics, 38 (21), 4558-4564. (doi:10.1364/AO.38.004558).

Record type: Article

Abstract

We demonstrate the characterization of fiber distributed-feedback lasers by scanning a heat-induced index perturbation along the cavity and by measuring the induced laser frequency shift. The measured shift is shown to be a good indicator for the intensity distribution in the cavity, and the experimental results reveal that the sensitivity of fiber distributed-feedback laser sensors with frequency readout is highly localized near the grating phase-shift position. Use of the characterization data to determine the grating coupling parameter K, the polarization dependence of K, and birefringence nonuniformities as well as for identification of the order of longitudinal mode operation are discussed and demonstrated experimentally. Asymmetrically phase-shifted lasers with highly directional output are also investigated.

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Published date: 1999

Identifiers

Local EPrints ID: 77823
URI: https://eprints.soton.ac.uk/id/eprint/77823
ISSN: 0003-6935
PURE UUID: 53644fbb-f997-4823-a1c4-b0e542087d8b
ORCID for M.N. Zervas: ORCID iD orcid.org/0000-0002-0651-4059

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Date deposited: 11 Mar 2010
Last modified: 26 Nov 2019 02:04

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