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实现了一种带温度控制的基于FBG的4通道波长可调准光分插复用器(OADMs)。对用悬臂梁法调谐的FBG中心波长温度稳定性进行了研究,设计了一种灵巧的温度控制装置,解决了FBG中心波长可调谐和温度稳定性间的矛盾。测试结果表明,实现的OADMs在环境温度范围-20℃～+60℃,中心波长变化小于0.004nm/℃,与未经温度补偿的悬臂梁调谐光栅相比温度稳定性提高了6.75倍。利用悬臂梁方法实现了FBG中心波长的微调,调谐范围为1nm。4路OADMs的信道间隔为0.8nm,上下路3dB通道带宽小于0.3nm,符合ITU TG.692的要求。利用自制的FBG实现OADMs的邻道隔离度大于35dB。
A temperature-controlled FBG-based 4-channel wavelength-adjustable optical add / drop multiplexer (OADMs) is implemented. The temperature stability of the central wavelength of FBG tuned by the cantilever method is studied. A smart temperature control device is designed to solve the problem of tunable wavelength and temperature stability of the FBG center wavelength. The test results show that the OADMs achieves a temperature change of less than 0.004nm / ℃ at the ambient temperature range of -20 ℃ ~ + 60 ℃, which is 6.75 times higher than that of the cantilever tuned grating without temperature compensation. Fine tuning of the center wavelength of the FBG is achieved using the cantilever method with a tuning range of 1 nm. The channel spacing of 4-way OADMs is 0.8nm, and the bandwidth of 3dB channels on the uplink and downlink is less than 0.3nm, which meets the requirements of ITU TG.692. The use of home-made FBG OADMs adjacent channel isolation greater than 35dB.