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Dual-wavelength erbium-doped fiber laser with polarization maintaining regenerated gratings for high temperature and force measurement.
- Source :
- Laser Physics; Oct2018, Vol. 28 Issue 10, p1-1, 1p
- Publication Year :
- 2018
-
Abstract
- A dual-wavelength erbium-doped fiber laser with bow-tie polarization maintaining regenerated fiber Bragg grating (PM-RFBG) as a sensor head is proposed. The PM-RFBG with enhanced thermal resistance is obtained through isothermal annealing treatment towards a saturated seed grating. The optical signal to noise ratio (SNR) is higher than 61 dB and the 3 dB line width is less than 18 pm at room temperature. The temperature characteristic of the laser sensor is investigated at temperatures ranging from 200 °C to 800 °C. The temperature sensitivities of the laser wavelength in fast (λ<subscript>f</subscript>) and slow (λ<subscript>s</subscript>) axes are 16.2 pm °C<superscript>−1</superscript> and 15.1 pm °C<superscript>−1</superscript>, respectively. The simultaneous measurement of force and temperature could be realized at temperatures ranging from 200 °C to 400 °C, for the force sensitivities of λ<subscript>f</subscript> and λ<subscript>s</subscript> are 1.333 nm F<superscript>−1</superscript> and 1.346 nm F<superscript>−1</superscript>, respectively. Due to the cross-sensitivities of temperature and force, the force sensitivity shows an approximately linear increase at temperatures between 400 °C and 600 °C. The dual-wavelength laser sensor is capable of operation at temperatures up to 800 °C due to the high optical SNR and narrow line width. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1054660X
- Volume :
- 28
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Laser Physics
- Publication Type :
- Academic Journal
- Accession number :
- 131318338
- Full Text :
- https://doi.org/10.1088/1555-6611/aad1b3