Strong \hbox and \hbox Mutual Coupling Conversion in a Two-Mode Fiber Bragg Grating

A fiber Bragg grating is inscribed in a two-mode fiber using a 193-nm excimer laser and a phase mask. Strong LP 01 and LP 11 mutual coupling as large as -22.5 dB, which corresponds to a modal conversion efficiency of more than 99%, is experimentally achieved. The intermodal coupling mechanism is the...

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Bibliographic Details
Published inIEEE photonics journal Vol. 4; no. 4; pp. 1080 - 1086
Main Authors Chuang Wu, Zhengyong Liu, Kit Man Chung, Tse, M-L V., Chan, F. Y. M., Lau, A. P. T., Chao Lu, Haw-Yaw Tam
Format Journal Article
LanguageEnglish
Published IEEE 01.08.2012
Subjects
Bragg gratings
Couplings
Fiber Bragg grating
modal converter
Optical fiber communication
Optical fiber polarization
Optical fiber sensors
two-mode fiber
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Summary:A fiber Bragg grating is inscribed in a two-mode fiber using a 193-nm excimer laser and a phase mask. Strong LP 01 and LP 11 mutual coupling as large as -22.5 dB, which corresponds to a modal conversion efficiency of more than 99%, is experimentally achieved. The intermodal coupling mechanism is theoretically analyzed through a finite element method. This device can be used as a low-cost reflective LP 01 ↔ LP 11 converter.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2012.2204735