Strain Measurement Using EDF Sigma Laser with Cascaded-Chirped Long Period Fiber Grating

Fukushima, Koken; Soares, Manuel Guterres; Wada, Atsushi; Tanaka, Satoshi; Ito, Fumihiko

doi:10.1364/oecc.2021.w4d.3

Cited by 1 publication

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous work, to compensate for the birefringence variation in the sensor section, we have proposed an EDF laser in a sigma cavity configuration (EDFσL) using a double-pass C-CLPG which combines a C-CLPG and a Faraday rotator mirror (FRM). To date, we have already demonstrated that the EDFσL can achieve higher precision than the conventional EDFRL using the C-CLPG in measuring temperature [21], strain [22], and bending-based displacement [23].…”

Section: Introductionmentioning

confidence: 99%

EDF sigma laser using double-pass cascaded-chirped long-period fiber grating with birefringence compensation effect and its application for strain measurement

Fukushima

Okano

Wada

et al. 2022

IEICE Electron. Express

View full text Add to dashboard Cite

In this work, we have constructed an Erbium-doped fiber sigma laser (EDFσL) using a double-pass cascaded-chirped long-period fiber grating (C-CLPG) from the viewpoint of the sensor applications. The double-pass C-CLPG is composed of a C-CLPG and a Faraday rotator mirror (FRM) and works as a comb-like wavelength selection element as well as a sensor section in the sigma-branch of the laser cavity. Further, due to the FRM reflection scheme, the double-pass C-CLPG compensates for birefringence variation in the sigma-branch during the sensing. In the experiment, the sensor section near the C-CLPG is intentionally deformed to induce birefringence variation assuming the external disturbances; nevertheless, it is confirmed that the double-pass C-CLPG provides stable polarization states. Then, under the birefringence variation, it is demonstrated that the proposed EDFσL can achieve a stable oscillation and resultant precise measurements in contrast to the simple EDF ring laser using the singlepass C-CLPG. In addition, for the demonstration of the sensor with external force to the fiber, the oscillation wavelength of EDFσL in response to axial strain is investigated, and a linear response with sensitivity ~0.32 pm/µε is obtained.

show abstract

Section: Introductionmentioning

confidence: 99%

EDF sigma laser using double-pass cascaded-chirped long-period fiber grating with birefringence compensation effect and its application for strain measurement

Fukushima

Okano

Wada

et al. 2022

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

Strain Measurement Using EDF Sigma Laser with Cascaded-Chirped Long Period Fiber Grating

Abstract: A novel laser strain sensor based on a sigma-cavity configuration is developed, in which a double-pass cascaded-chirped long period fiber grating with a Faraday rotator mirror is employed in the sigma-branch as a strain-sensitive wavelength filter. © 2021 The Author(s)

Cited by 1 publication

References 5 publications

EDF sigma laser using double-pass cascaded-chirped long-period fiber grating with birefringence compensation effect and its application for strain measurement

EDF sigma laser using double-pass cascaded-chirped long-period fiber grating with birefringence compensation effect and its application for strain measurement

Contact Info

Product

Resources

About