Presentation 2022-08-25
EDF laser displacement sensor based on bending characteristics of cascaded-chirped long-period fiber grating
Koken Fukushima, Makoto Okano, Atsushi Wada, Satoshi Tanaka, Fumihiko Ito,
PDF Download Page PDF download Page Link
Abstract(in Japanese) (See Japanese page)
Abstract(in English) We have constructed an EDF laser in a sigma cavity configuration (EDFσL) using a double-pass cascaded-chirped long-period fiber grating (C-CLPG) for a displacement measurement. In this configuration, the double-pass C-CLPG consists of a C-CLPG and a Faraday rotator mirror (FRM), and works as a reflective sensor section with a comb-like spectrum and allows for flexible sensor configurations. In addition, it has a function to compensate for birefringence fluctuations during sensing operation by introducing the FRM. In the experiment, real-time displacement measurement by the EDFσL is demonstrated based on the bending characteristics of the C-CLPG. Further, it is confirmed that the proposed EDFσL shows a more stable oscillation due to the birefringence compensation effect than the previous single-pass C-CLPG-based EDF ring laser, enabling more precise measurements.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Fiber optic sensor / Long-period fiber grating / Cascaded-chirped long-period fiber grating / Erbium-doped fiber laser / Faraday rotator mirror / Displacement
Paper # OFT2022-9
Date of Issue 2022-08-18 (OFT)

Conference Information
Committee OCS / OFT / LSJ
Conference Date 2022/8/25(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Takeshi Hoshida(Fujitsu) / Makoto Yamada(Osaka Metropolitan Univ.)
Vice Chair
Secretary (NTT) / (Sumitomo Electric Industries) / (Ryutsu Keizai Univ.)
Assistant / Yukihiro Goto(NTT) / Naoyuki Ozawa(Fujikura)

Paper Information
Registration To Technical Committee on Optical Communication Systems / Technical Committee on Optical Fiber Technology / The Laser Society of Japan
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) EDF laser displacement sensor based on bending characteristics of cascaded-chirped long-period fiber grating
Sub Title (in English)
Keyword(1) Fiber optic sensor
Keyword(2) Long-period fiber grating
Keyword(3) Cascaded-chirped long-period fiber grating
Keyword(4) Erbium-doped fiber laser
Keyword(5) Faraday rotator mirror
Keyword(6) Displacement
1st Author's Name Koken Fukushima
1st Author's Affiliation National Defense Academy(NDA)
2nd Author's Name Makoto Okano
2nd Author's Affiliation National Defense Academy(NDA)
3rd Author's Name Atsushi Wada
3rd Author's Affiliation National Defense Academy(NDA)
4th Author's Name Satoshi Tanaka
4th Author's Affiliation National Defense Academy(NDA)
5th Author's Name Fumihiko Ito
5th Author's Affiliation Shimane University(Shimane Univ.)
Date 2022-08-25
Paper # OFT2022-9
Volume (vol) vol.122
Number (no) OFT-162
Page pp.pp.16-21(OFT),
#Pages 6
Date of Issue 2022-08-18 (OFT)