A fiber sensor for measuring gas concentration based on laser's transient regime

Wen Gang Guo; Xiu Feng Yang; Shao Jun Luo; Yong Nan Li; Cheng Hou Tu; Fu Yun Lu; Hong Jie Wang; En Bang Li; Chao Lu

A fiber sensor for measuring gas concentration based on laser's transient regime

Wen Gang Guo, Xiu Feng Yang, Shao Jun Luo, Yong Nan Li, Cheng Hou Tu, Fu Yun Lu, Hong Jie Wang, En Bang Li, Chao Lu

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

A novel fiber sensor for measuring gas concentration is reported, which is based on the transient regime of an Er-doped fiber laser. A Sagnac fiber loop and a FBG that also acts as the sensing element form the linear fiber laser cavity. By adjusting the central wavelength of the grating mirror, the oscillating wavelength is set to 1531.56 nm, which is a strong absorption peak of C2H2. The gas concentration can be obtained by measuring the laser build-up time, which is closely related with the cavity loss and therefore determined by the gas concentration. In the present experiment, the sensor's sensitivity and resolution can be adjusted simply by controlling the pumping level. When the pump pulse is at high level and low level of 25 mW and 5.9 mW, respectively, a sensitivity of 100 ppm/μs and a resolution of 20 ppm are achieved.

Original language	English
Pages (from-to)	308-312
Number of pages	5
Journal	Wuli Xuebao/Acta Physica Sinica
Volume	56
Issue number	1
Publication status	Published - 1 Jan 2007
Externally published	Yes

Keywords

Fiber sensor
Gas concentration
Laser build-up time
Transient regime

ASJC Scopus subject areas

General Physics and Astronomy

Cite this

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title = "A fiber sensor for measuring gas concentration based on laser's transient regime",

abstract = "A novel fiber sensor for measuring gas concentration is reported, which is based on the transient regime of an Er-doped fiber laser. A Sagnac fiber loop and a FBG that also acts as the sensing element form the linear fiber laser cavity. By adjusting the central wavelength of the grating mirror, the oscillating wavelength is set to 1531.56 nm, which is a strong absorption peak of C2H2. The gas concentration can be obtained by measuring the laser build-up time, which is closely related with the cavity loss and therefore determined by the gas concentration. In the present experiment, the sensor's sensitivity and resolution can be adjusted simply by controlling the pumping level. When the pump pulse is at high level and low level of 25 mW and 5.9 mW, respectively, a sensitivity of 100 ppm/μs and a resolution of 20 ppm are achieved.",

keywords = "Fiber sensor, Gas concentration, Laser build-up time, Transient regime",

author = "Guo, {Wen Gang} and Yang, {Xiu Feng} and Luo, {Shao Jun} and Li, {Yong Nan} and Tu, {Cheng Hou} and Lu, {Fu Yun} and Wang, {Hong Jie} and Li, {En Bang} and Chao Lu",

year = "2007",

month = jan,

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language = "English",

volume = "56",

pages = "308--312",

journal = "Wuli Xuebao/Acta Physica Sinica",

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TY - JOUR

T1 - A fiber sensor for measuring gas concentration based on laser's transient regime

AU - Guo, Wen Gang

AU - Yang, Xiu Feng

AU - Luo, Shao Jun

AU - Li, Yong Nan

AU - Tu, Cheng Hou

AU - Lu, Fu Yun

AU - Wang, Hong Jie

AU - Li, En Bang

AU - Lu, Chao

PY - 2007/1/1

Y1 - 2007/1/1

N2 - A novel fiber sensor for measuring gas concentration is reported, which is based on the transient regime of an Er-doped fiber laser. A Sagnac fiber loop and a FBG that also acts as the sensing element form the linear fiber laser cavity. By adjusting the central wavelength of the grating mirror, the oscillating wavelength is set to 1531.56 nm, which is a strong absorption peak of C2H2. The gas concentration can be obtained by measuring the laser build-up time, which is closely related with the cavity loss and therefore determined by the gas concentration. In the present experiment, the sensor's sensitivity and resolution can be adjusted simply by controlling the pumping level. When the pump pulse is at high level and low level of 25 mW and 5.9 mW, respectively, a sensitivity of 100 ppm/μs and a resolution of 20 ppm are achieved.

AB - A novel fiber sensor for measuring gas concentration is reported, which is based on the transient regime of an Er-doped fiber laser. A Sagnac fiber loop and a FBG that also acts as the sensing element form the linear fiber laser cavity. By adjusting the central wavelength of the grating mirror, the oscillating wavelength is set to 1531.56 nm, which is a strong absorption peak of C2H2. The gas concentration can be obtained by measuring the laser build-up time, which is closely related with the cavity loss and therefore determined by the gas concentration. In the present experiment, the sensor's sensitivity and resolution can be adjusted simply by controlling the pumping level. When the pump pulse is at high level and low level of 25 mW and 5.9 mW, respectively, a sensitivity of 100 ppm/μs and a resolution of 20 ppm are achieved.

KW - Fiber sensor

KW - Gas concentration

KW - Laser build-up time

KW - Transient regime

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M3 - Journal article

SN - 1000-3290

VL - 56

SP - 308

EP - 312

JO - Wuli Xuebao/Acta Physica Sinica

JF - Wuli Xuebao/Acta Physica Sinica

IS - 1

ER -

A fiber sensor for measuring gas concentration based on laser's transient regime

Abstract

Keywords

ASJC Scopus subject areas

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