- Title
- A comparison of delayed self-heterodyne interference measurement of laser linewidth using Mach-Zehnder and Michelson interferometers
- Creator
- Canagasabey, Albert; Michie, Andrew; Canning, John; Holdsworth, John; Fleming, Simon; Wang, Hsiao-Chuan; Aslund, Mattias L.
- Relation
- ARC.DP0776092 & D0879465
- Relation
- Sensors Vol. 11, Issue 10, p. 9233-9241
- Publisher Link
- http://dx.doi.org/10.3390/s111009233
- Publisher
- MDPI AG
- Resource Type
- journal article
- Date
- 2011
- Description
- Linewidth measurements of a distributed feedback (DFB) fibre laser are made using delayed self heterodyne interferometry (DHSI) with both Mach-Zehnder and Michelson interferometer configurations. Voigt fitting is used to extract and compare the Lorentzian and Gaussian linewidths and associated sources of noise. The respective measurements are w(L) (MZI) = (1.6 ± 0.2) kHz and w(L) (MI) = (1.4 ± 0.1) kHz. The Michelson with Faraday rotator mirrors gives a slightly narrower linewidth with significantly reduced error. This is explained by the unscrambling of polarisation drift using the Faraday rotator mirrors, confirmed by comparing with non-rotating standard gold coated fibre end mirrors.
- Subject
- coherent optical effects; heterodyne; interferometry; DFB; laser linewidth; faraday rotation; Mach-Zehnder interferometer; Michelson interferometer; Gaussian noise; Lorentzian noise
- Identifier
- http://hdl.handle.net/1959.13/1046020
- Identifier
- uon:14565
- Identifier
- ISSN:1424-8220
- Language
- eng
- Full Text
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