Modal-Weight Measurements With Fiber Gratings

Author

Lu Yan ; Barankov, Roman ; Steinvurzel, Paul ; Ramachandran, Siddharth

Author_Institution

Dept. of Electr. & Comput. Eng., Boston Univ., Boston, MA, USA

Volume

33

Issue

13

fYear

2015

fDate

July1, 1 2015

Firstpage

2784

Lastpage

2790

Abstract

We demonstrate a radiation mode coupler based on a tilted fiber Bragg grating that spatially demultiplexes different modes in a few-mode fiber. The observed radiation patterns match well with those theoretically predicted using the volume current method. The correlations in measured relative modal weights obtained from this device and an accurate interferometric measurement used as a reference, suggest that this technique has potential applications in providing real-time, nondestructive modal power measurement for mode division-multiplexed communications systems or monitoring the modal content in fiber lasers.

Keywords

Bragg gratings; demultiplexing; fibre lasers; light interferometry; optical communication equipment; optical correlation; optical fibre communication; optical fibre couplers; optical fibre testing; weighing; few-mode fiber; fiber lasers; interferometric measurement; modal-weight measurements; mode division-multiplexed communications systems; nondestructive modal power measurement; optical correlations; radiation mode coupler; spatial demultiplexing; tilted fiber Bragg grating; volume current method; Antenna radiation patterns; Couplings; Optical fiber couplers; Optical fiber devices; Optical fiber networks; Optical fiber polarization; Vectors; Fiber Bragg grating; mode-division multiplexing high-power fiber lasers; volume current method;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2015.2413391

Filename

7061452