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为了对光纤布喇格光栅(FiberBraggGrating,FBG)的中心反射波长进行双向调谐,提出了采用半导体致冷器、热敏电阻配合控制电路对FBG的工作温度进行双向精确控制实现温度/波长调谐的方法,讨论了温度/波长调谐的实现技术,并研制了FBG双向温度调谐器样品.在0℃、20℃、40℃环境温度条件下对调谐器进行了范围为-20℃～60℃、步进为10℃的温度扫描测试.实验结果表明FBG调谐器的中心反射波长与设定的温度有较好的线性关系,除波长外其它光栅特性基本不随调谐温度改变;调谐装置准确度优于0.05nm,且受环境温度变化的影响较小.
In order to bi-directionally tune the central reflection wavelength of Fiber Bragg grating (FBG), a method of bidirectional accurate control of FBG operating temperature by semiconductor refrigerator and thermistor with control circuit is proposed to achieve temperature / wavelength tuning , Discussed the realization technology of temperature / wavelength tuning, and developed a FBG bi-directional temperature tuner sample.Under the conditions of 0 ℃, 20 ℃ and 40 ℃ ambient temperature, the tuner was operated in the range of -20 ℃ ~ 60 ℃, The results show that the FBG tuner has a good linear relationship between the central reflection wavelength and the set temperature, and the other grating characteristics except the wavelength basically do not change with the tuning temperature. The accuracy of the tuning device is better than 0.05 nm , And less affected by changes in ambient temperature.