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首页> 外文期刊>Optical engineering >High-sensitivity sucrose erbium-doped fiber ring laser sensor
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High-sensitivity sucrose erbium-doped fiber ring laser sensor

机译：高灵敏度蔗糖铒掺杂光纤环激光传感器

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摘要

We Investigate a high-sensitivity sucrose sensor based on a standard erbium-doped fiber ring laser incorporating a coreless fiber (CF). A single-mode-coreless-single mode (SCS) structure with a very low insertion loss has been constructed. The SCS fiber structure performed dual function as an intracavity fiber filter and/ or a sensing element. The gain medium (erbium-doped fiber) is pumped by a 975-nm wavelength fiber coupled diode laser. Laser emission around 1537 nm with -2 dBm peak output power is obtained when a CF in SCS structure has a diameter of 125 nm. The 3-dB line-width of the laser is <0.14 nm, which is beneficial to high precision sensing. The sucrose concentration varied from 0% to 60%, and the relationship between the lasing wavelength and the sucrose concentration exhibited linear behavior (R2 = 0.996), with sensitivity of 0.16 nm/% was obtained. To improve the measurement sensitivity, the CF is etched by hydrofluoric acid. The splice joint of etched CF with SMF is a taper, which improves its sensitivity to sucrose changes. An average sensitivity of 0.57 nm/% and a high signal-to-noise ratio of 50 dB make the proposed sensor suitable for potential applications.
机译：我们研究了一种基于标准铒掺杂光纤环激光的高灵敏度蔗糖传感器，包括无芯纤维（CF）。构造了具有非常低的插入损耗的单模 - 无核单模（SCS）结构。 SCS光纤结构执行双功能作为腔内光纤滤波器和/或传感元件。增益介质（掺铒光纤）由975nm波长光纤耦合二极管激光器泵送。当SCS结构中的CF直径为125nm时，获得了大约1537nm的激光发射，获得-2 dBm峰值输出功率。激光器的3-DB线宽<0.14nm，有利于高精度感测。蔗糖浓度因0％至60％而变化，并且激光波长与蔗糖浓度之间的关系表现出线性行为（R2 = 0.996），得到0.16nm /％的灵敏度。为了提高测量敏感性，通过氢氟酸蚀刻CF。用SMF蚀刻CF的接头是锥度，这提高了其对蔗糖变化的敏感性。平均灵敏度为0.57nm /％，高信噪比为50 dB，使得所提出的传感器适用于潜在的应用。

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