基于掺杂型不饱和聚酯的可调谐F-P腔的研究

Studies on tunable F-P cavity based on doped unsaturated polyester

将分散红 1(DR1)掺杂的不饱和聚酯(UP)树脂充入F- P腔中,在极化的同时进行热交联,制得了具有一定电光效应的非线性光学不饱和聚酯。研究了温度、引发剂和分散红 1 的含量对不饱和聚酯凝胶和固化时间的影响。随着分散红 DR1 含量的增加,体系的凝胶时间减少,固化时间增加,当 DR1 量>5%时,凝胶时间很短而固化时间却很长,已不适宜进行极化。随着树脂中过氧化苯甲酰(BPO)加入量的增加或温度的升高,体系的凝胶和固化时间缩短。将其制成器件后,发现其电光系数衰减性能与文献报道的掺杂型光交联不饱和聚酯和某些柔性主链的侧链型 NLO聚合物相当,而比PMMA/DR1掺杂体系的衰减小得多,其光损耗基本能满足器件化的需要,而其器件制作工艺性能大大改进,明显优于传统的旋涂法。极化后整个F- P腔的光损耗为 5dB,电光系数 r33 为 9pm/V,最大衰减量为 52%。此类材料和极化方法适合于制作可调谐F- P腔型光开关。

In this work a new method to prepare Fabry-Perot (F-P) cavity for optical switch was proposed by filled with unsaturated polyester (UP) resins doped with disperse red 1 (DR 1), and thermal cured in polarization process thereafter. Effects of temperature, initiator and DR 1 content on gel and curing time of UP resins were studied. With increasing content of DR1, the gel time is reduced and the curing time was increased. When the content of DR1 was greater than 5%, the resin is no longer suitable for polarization because of long curing time. However, the gel and curing time of the resin can also be reduced by increasing initiator concentration and improving the temperature. After polarization, the optic loss of total F-P cavity was 5 dB, and electro-optic coefficient γ33 was 9 pm/V. The maximum decay is 52%, which is lower than the widely studied PMMA/DR1 system. The manufacturing technology for such device was significantly superior to the traditional spin coating method. All of these convinced this novel method to be much fit for making tunable F-P cavity for optical switch.