Hida Y, Onose K, Imamura S
NTT Opto-electronics Laboratories, Tokai-Mura, Naka-Gun, Ibaraki-Ken 319-11, Japan.
Appl Opt. 1997 Sep 20;36(27):6828-37. doi: 10.1364/ao.36.006828.
Using deuterated and fluorinated methacrylate polymer waveguides, we fabricated thermo-optic phase shifters that require a small electric power of 10 mW to cause a pi phase shift. The phase shifters had a phase drift that was greater at higher humidity and that was saturated in approximately 10 min. This phenomenon is ascribed to the moisture desorption-sorption of the waveguide polymers caused by heating-cooling on the basis of experimental results on the relationships among waveguide temperature increase, relative humidity, and moisture sorption of the waveguide polymers. This conclusion is supported by the calculation of temperature and moisture distribution in the waveguide when the thin-film heater is heated.
我们使用氘代和氟化甲基丙烯酸酯聚合物波导制造了热光相移器，该相移器仅需10毫瓦的小电功率即可产生π相移。这些相移器存在相漂移，在较高湿度下相漂移更大，并且在大约10分钟内达到饱和。基于波导温度升高、相对湿度和波导聚合物吸湿之间关系的实验结果，这种现象归因于加热 - 冷却导致的波导聚合物的水分解吸 - 吸附。当薄膜加热器加热时，波导中温度和水分分布的计算结果支持了这一结论。
