scholarly journals EDF ring laser using cascaded-chirped long period fiber grating for temperature measurement

2020 ◽  
Vol 28 (9) ◽  
pp. 13081 ◽  
Author(s):  
Koken Fukushima ◽  
Quoc Hung Bui ◽  
Koki Nakaya ◽  
Manuel Guterres Soares ◽  
Atsushi Wada ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Ring Laser ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating

scholarly journals Loss-Modulation-Based Wavelength-Range Shifting of Tunable EDF Ring Laser with Cascaded-Chirped Long-Period Fiber Grating for Temperature Measurement

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2342
Author(s):  
Koken Fukushima ◽  
Manuel Guterres Soares ◽  
Atsushi Wada ◽  
Satoshi Tanaka ◽  
Fumihiko Ito
Keyword(s):  
Temperature Measurement ◽  
Wavelength Range ◽  
Ring Laser ◽  
Wavelength Region ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Variable Optical Attenuator ◽  
Erbium Doped ◽  
Period Fiber Grating

A novel tunable Erbium-doped fiber ring laser (EDFRL) with a cascaded-chirped long-period fiber grating (C-CLPG) as a wavelength selection filter is proposed from the viewpoint of the sensor use, in which a variable optical attenuator (VOA) is employed as an intracavity loss modulator to change the oscillation wavelength region so that the resultant tuning wavelength range is widened. In the demonstrative experiment for temperature measurements, oscillation over the wavelength range of 12.85 nm (1557.62~1570.47 nm), which is more than three times range of the previously presented laser and is equivalent to 64 °C in terms of temperature change, was achieved, while a single-wavelength oscillation was maintained. In addition, a practical technique for realizing a temperature measurement by combining with the VOA control is also discussed.

Simultaneous Strain and Temperature Measurement Using Cascaded Chirp Long Period Fiber Grating

2016 ◽  
Author(s):  
Mayumi Nagatsuka ◽  
Masayoshi Koizumi ◽  
Than T. Ngo ◽  
Junki Saito ◽  
Satoshi Tanaka ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating

scholarly journals High sensitivity temperature measurement via mask-free hybrid polymer long period fiber grating

2018 ◽  
Vol 26 (13) ◽  
pp. 16125 ◽  
Author(s):  
Bjorn Paulson ◽  
Hojoong Jung ◽  
Jihyun Hwang ◽  
Seongjin Hong ◽  
Sanghwa Lee ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
High Sensitivity ◽  
Fiber Grating ◽  
Hybrid Polymer ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating
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