Temperature-compensated dual-polarization fiber grating laser sensors

来源 :Chinese Optics Letters | 被引量 : 0次 | 上传用户:yfzzx
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We report on temperature compensation for beat-frequency-encoded dual-polarization fiber laser sensors based on a cleave-rotate-splice method. By cleaving the laser cavity into two segments with comparable lengths,aligning them with a rotated angle of 90°,and then fusion splicing the two halves,the temperature sensitivity in terms of beat-frequency variation can be greatly reduced from-1.99 to-0.30 MHz∕°C(or by 84.9%).In contrast,the sensitivity to point loaded mass hardly changes. We also find that the beat-frequency fluctuation decreases from 30 to 25 kHz as a result of the temperature compensation. We report on temperature compensation for beat-frequency-encoded dual-polarization fiber laser sensors based on a cleave-rotate-splice method. By cleaving the laser cavity into two segments with comparable lengths, aligning them with a rotated angle of 90 °, and then fusion splicing the two halves, the temperature sensitivity in terms of beat-frequency variation can be greatly reduced from-1.99 to-0.30 MHz / ° C (or by 84.9%). In contrast, the sensitivity to point loaded mass hardly changes. We also find that the beat-frequency fluctuation decreases from 30 to 25 kHz as a result of the temperature compensation.
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