A novel temperature sensor and variable optical attenuator based on a high-birefringence fiber loop mirror |
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Authors: | Y. Yan Q. Zhao S. Chen L. Liu H. Zhang G. Huang S. Gao X. Dong |
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Affiliation: | (1) Institute of Modern Optics, Nankai University, Tianjin, 300071, China;(2) Mathematics and Physics Department, University of Petroleum, Beijing, 102249, China |
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Abstract: | A novel variable optical attenuator based on a high-birefringence fiber loop mirror is described. The fiber loop mirror is placed in a controlled-temperature chamber. As the temperature is increased, the transmission spectrum exhibits a shift, while virtually not changing its shape. The degree of attenuation at a wavelength of 1558 nm exceeds 30 dB, while the introduced losses are about 2.5 dB. The temperature-induced shift of the spectrum is strictly linear. The response of the temperature sensor based on this effect is linear with a correlation coefficient of 0.9997. The obtained experimental data are interpreted based on the results of numerical modeling. |
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