Multi-Wavelength Tunable Fiber Laser using SOA: Application to Fiber Bragg Grating Vibration Sensor Array
Multi-Wavelength Tunable Fiber Laser using SOA: Application to Fiber Bragg Grating Vibration Sensor Array
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DOI：
10.1109/icsens.2007.4388423
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
S. Tanaka;K. Inamoto;H. Yokosuka;H. Somatomo;N. Takahashi
中科院分区：
文献类型：
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作者：
S. Tanaka;K. Inamoto;H. Yokosuka;H. Somatomo;N. Takahashi
为了构建热稳定光纤布拉格光栅（FBG）振动传感器阵列，提出了一种新型多波长光纤环形激光器，实现了多点振动检测和温度补偿。该激光器采用半导体光放大器（SOA）作为增益介质，fbg作为波长选择元件。由于SOA是一种非均匀增宽增益介质，因此可以在所使用的fbg的布拉格波长处实现稳定的多波长振荡。激光器的振荡输出用于波分复用（WDM）光纤光栅振动传感器阵列的光源，其中输出的每个波长分量为阵列光纤光栅振动传感器提供一个光源。此外，激光源的波长可以通过对激光的fbg施加应变来调谐。光纤光栅传感器的检测方案基于强度调制技术，热稳定是通过激光的波长调谐来实现的。在实验中，制备了双波长可调谐光纤激光器，并对激光器的基本特性进行了研究。通过将激光器应用于光纤光栅传感器阵列，实现了两点同步振动检测和温度补偿检测。
A novel multi-wavelength fiber ring laser is proposed in order to construct a thermally stabilized fiber Bragg grating (FBG) vibration sensor array in which detection of multipoint vibrations and temperature compensation of the detection can be achieved. The laser employs a semiconductor optical amplifier (SOA) as a gain medium and FBGs as wavelength selection components. Since the SOA is an inhomogeneous broadening gain medium, stable multi-wavelength oscillation can be realized at the Bragg wavelengths of the FBGs used. The oscillation output from the laser is used for an optical source of wavelength division multiplexed (WDM) FBG vibration sensor array, in which each wavelength component of the output provides one of the optical sources for arrayed FBG vibration sensors. In addition, the wavelength of the laser source can be tuned by applying strain to the FBGs of the laser. The detection scheme of the FBG sensors is based on intensity modulation technique and the thermal stabilization is realized by the wavelength tuning of the laser. In the experiment, a dual-wavelength tunable fiber laser has been fabricated and fundamental characteristics of the laser have been investigated. By applying the laser to the FBG sensor array, simultaneous two-point vibration detection and temperature compensation of the detection have been also demonstrated.