A Novel Polarization Maintaining Fiber Temperature Sensor and Its
Application in Semiconductor Laser Therapy
DAI Li1, YAO Zhiqing1, ZHAO Jun2,3
1. Department of Pediatric Stomatology, Institute and Hospital of Stomatology, Nanjing University Medical School, Nanjing Jiangsu
210000, China; 2. Nanjing Sunlight Information Technology Co. Ltd., Nanjing Jiangsu 210000, China; 3. OSC Center, Southeast
University, Nanjing Jiangsu 210000, China
Abstract：A reflective polarization-maintaining fiber temperature sensor (PMF-TS) with advantages such as high precision, low
cost and good reciprocity was developed based on the temperature birefringence effects of the polarization maintaining optical
fiber. The PMF-TS was small volume, light weight and could be integrated with laser output optical fiber to consist the probe of
the multifunctional laser treatment. Through real-time and accurate monition on the change of the target tissue temperature, the
output energy and pulse frequency of semiconductor laser could be closed-loop controlled, which could meet the needs of precise
minimally invasive laser thermotherapy for deep vivo tumor tissue. The prototype was developed and tested, and the results showed
that the sensor resolution was 0.01℃, which was far better than the 18B20 digital temperature sensor as well as the PT100 platinum
resistance temperature sensor. After the closed-loop control, the temperature range semiconductor laser could be controlled in -40℃-
70℃, and the fluctuation of output power for semiconductor laser could be controlled in less than ±0.1 W.
戴丽1，姚志清1，赵俊2,3. 新型保偏光纤温度传感器及其在半导体激光治疗领域的应用[J]. 中国医疗设备, 2018, 33(10): 36-40.
DAI Li1, YAO Zhiqing1, ZHAO Jun2,3. A Novel Polarization Maintaining Fiber Temperature Sensor and Its
Application in Semiconductor Laser Therapy. China Medical Devices, 2018, 33(10): 36-40.
