Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2018-11-15

Journal: OPTICS LETTERS

Included Journals: Scopus、SCIE

Volume: 43

Issue: 22

Page Number: 5496-5499

ISSN: 0146-9592

Key Words: Brillouin scattering; Compressed sensing; Digital storage; Discrete cosine transforms; Distributed database systems; Fiber optic sensors; Image coding; Optical data storage; Optical fibers, Brillouin optical time domain analysis; Brillouin optical time domain reflectometry; Fiber optic sensing systems; Frequency acquisition; Frequency increments; Hardware modifications; Orthogonal matching pursuit; Sparse representation, Time domain analysis

Abstract: A compressed-sensing-technique-based Brillouin optical time-domain analysis is proposed. The Brillouin spectrum has a sparse representation in its discrete cosine transform domain, which can be successfully recovered from far fewer measurements with high probability through an orthogonal matching-pursuit algorithm. This work shows both empirically and experimentally that the amount of frequency acquisitions needed is only 30% of those required by a conventional distributed Brillouin fiber-optic sensing system with 1 MHz frequency increment in the acquisition process to obtain Brillouin spectra along an optical fiber; therefore, the number of acquisitions and the amount of data storage/transfer are greatly reduced. Moreover, the proposed method does not need any hardware modification in an existing sensing system and can also be adopted by Brillouin optical time-domain reflectometry. (C) 2018 Optical Society of America