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秦涛,刘红兵,邓晓旭,郑兴伟.实现光强精细调制的共轭聚合物波导电光调制器[J].光电子激光,2014,(8):1466~1470

实现光强精细调制的共轭聚合物波导电光调制器

A conjugated polymer waveguide electro-optic modulator for accurate light inten sity modulation

投稿时间：2014-01-06

DOI：

中文关键词: 电光效应聚合物波导调制器直流偏压导波共振

英文关键词:electro-optic effect polymer waveguide modulator DC bias voltage guided wave resonance

基金项目:国家商用飞机制造工程技术研究中心创新基金(SAMC12-JS-15-019)资助项目 (1.上海飞机制造有限公司,上海 200436； 2.上海交通大学物理与天文系,上海 200240)

作者	单位
秦涛	上海飞机制造有限公司,上海 200436
刘红兵	上海飞机制造有限公司,上海 200436
邓晓旭	上海交通大学物理与天文系,上海 200240
郑兴伟	上海飞机制造有限公司,上海 200436

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中文摘要:

提出了一种新型的聚合物波导电光调制器,同时利用了聚合物材料的Pockels效应和Kerr效应,在不增加调制电压的情况下,通过引入直流偏压增加了调制器的调制度,调制深度随着直流偏压的增加而增加。采用峰-峰值 9.9V的调制电压、100V的直流偏压,利用po ckels电光系数γ₃₃仅为4．052×10－14 m/V和二次电光系数S₃₃为6．889×10－21 m²/V 2的聚合物材料制备了波导电光调制器,实现了7.54%的调制度。如果采用具有更高的分子极化率及电光系数的非线性共轭聚合物材料,可期待在更低的直流偏压和工作电压情况下,得到更高的调制深度。调制器的工作面积大,可以实现大面积光斑的调制。本文的聚合物波导电光调制器适用于激光脉冲喷丸强化与成形技术,通过调整调制器的直流工作偏压,能够实现激光光斑能量的精细调节。

英文摘要:

Some conjugated polymers,which have the delocalization of p-electrons and the push-pull structure along the main conjugated chain,exhibit second and third order nonlinear optical res ponses after corona-poling.An electro-optic polymer waveguide modulator based on both Pockels and Kerr effect s has been demonstrated.By applying a dc bias,the modulation depth is improved with the dc bias at a fixed m odulation voltage.The proposed modulator achieves a 7.54% modulation depth with 9.9V p.p modulation triangular voltage and 100V dc bias at 100kHz by employing a conjugated polymer,poly (9,9-dioctyl-2,7-fluorene-co -benzo [c][1,2,5] thiadiazole-co-9-hexyl-3,6-carbazole),where the Pockels coefficient comp onent is only γ₃₃＝4．052×10－14 m/V an d the second ary electro-optic coefficient is S₃₃＝6．889×10 －21 m²/V².A higher modulation depth could be realized at a lower dc bias with a lower modula tion voltage by using a higher molecular polarizability and electro-optical coefficient conjugated polymer.Be cause of the big working area,the modulation of the large light spot could be achieved.In the laser pulse shot pe ening and forming technique, accurate light intensity modulation can be realized by adjusting the dc bias v oltage of the modulator.

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