Open AccessSimultaneous mode-by-mode impulse response measurement of multi-mode optical systems based on linear optical sampling
Author(s) -
Tsuyoshi Arakawa,
Fumihiko Ito,
Daisuke Iida,
Tetsuya Manabe
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.012080
Subject(s) - optics , mode scrambler , impulse response , multi mode optical fiber , equilibrium mode distribution , polarization mode dispersion , optical fiber , single mode optical fiber , impulse (physics) , multiplexing , physics , materials science , radiation mode , telecommunications , computer science , mathematics , mathematical analysis , quantum mechanics
Linear optical sampling is presented as a useful method to characterize mode-by-mode impulse responses or the spectral transfer matrix of multimode optical systems. In a two non-degenerate linear-polarization (LP) mode transmission line, which actually supported six independent spatial modes, 6 × 6 spectral transfer functions were simultaneously measured using multiplexed mode-by-mode impulse responses in series. According to the singular value analysis of the matrix, the mode-dependent loss spectrum was analyzed over a frequency bandwidth of several hundred GHz, which was determined by the spectra of the probe and reference pulses. The technique would be useful for characterizing various multi-spatial-mode fiber systems that are intensively being developed to overcome the limit in capacity of single-mode optical fibers.