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Fiber Bragg grating laser sensor with direct radio-frequency readout

机译:光纤布拉格光栅激光传感器,具有直接射频读数

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摘要

A fiber Bragg grating (FBG)-coupled ring laser sensor is demonstrated. In the proposed configuration the interrogating source, the sensing head and the readout instrument are integrated in a single fiber-optic device. An FBG inserted within a bidirectional fiber ring couples the two counterpropagating modes of the cavity, generating a splitting of the resonant wavelengths proportional to the FBG reflectivity. When the cavity gain is brought beyond threshold, the two peaks of the split resonances simultaneously lase, leading to a beat note in the emission spectrum whose frequency tracks any small shift of the FBG reflectivity spectrum. Such a beat note can be simply monitored by a frequency counter, without the need for an optical spectrometer, allowing to significantly reduce size and costs of the sensor setup. The sensing performance compares well to the state-of-the-art thermomechanical fiber sensors. (C) 2016 Optical Society of America
机译:纤维布拉格光栅(FBG) - 耦合环激光传感器被证明。 在所提出的配置中,询问源,传感头和读出仪器集成在单个光纤设备中。 插入双向光纤环内的FBG耦合到腔的两个逆产模式,产生与FBG反射率成比例的谐振波长的分裂。 当腔增益引起超过阈值时,分流共振的两个峰同时升高,导致发射光谱中的拍音,其频率跟踪FBG反射率的任何小偏移。 可以通过频率计数器简单地监控这种拍音,而无需光谱仪,允许显着降低传感器设置的尺寸和成本。 感测性能与最先进的热机械光纤传感器相比很好。 (c)2016年光学学会

著录项

  • 来源
    《Optics Letters》 |2016年第7期|共3页
  • 作者单位

    CNR INO Via Campi Flegrei 34 Comprensorio Olivetti I-80078 Naples Italy;

    QOpSys Srls Via Matteotti 23 Bari Italy;

    CNR INO Via Campi Flegrei 34 Comprensorio Olivetti I-80078 Naples Italy;

    CNR INO Via Campi Flegrei 34 Comprensorio Olivetti I-80078 Naples Italy;

    CNR INO Via Campi Flegrei 34 Comprensorio Olivetti I-80078 Naples Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

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