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| | A Four-channel optical add/drop multiplexers(OADM) was designed based on FBG.In order to solve the conflict between the tunable capability and the temperature stability of the center wavelength,a smart temperature stable set,which is especially suitable for FBG tuned by cantilever beams,was designed.The testing results show within the temperature range -20-+60 ℃the center wavelength shift is less than 0.004 nm/℃ and the thermal stability is 6.75 times as without thermal stable set.Using the cantilever beam ... | | 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。 | | 文摘来源 | | Theanalysis on the temperature stability of center wavelength for the thin film interleaver with multicavity by Takahashi model is presented. It is found that the change of optical constant caused by the interactional elastic force between the reflector thin film stack and the cavity with the temperature change is not the main reason affecting the shift of center wavelength of the device, however, the temperature coefficient of the refractive index of cavity material is the important factor. The simulated c... | | 利用高桥模型详细分析了多腔薄膜梳状滤波器的中心波长温度稳定性问题。发现由于多腔薄膜梳状滤波器的固体腔较厚而反射镜膜系的厚度相对较薄,因此膜系与固体腔之间的温度引起的弹性应力导致的膜系光学常数的变化已经不是主要影响因素,而固体腔材料的折射率温度系数引起的中心波长漂移对整个器件的影响较大。计算表明对于一个密集波分复用中使用的100 G信道间隔的三腔薄膜梳状滤波器而言,当固体腔材料(熔融石英)的折射率温度系数为1×10-5/℃时,器件的中心波长漂移在-40 ℃~85 ℃的温度范围内可达±1 nm。 | | 文摘来源 | |   |
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