High-Performance WR-4.3 Optically Controlled Variable Attenuator With 60-dB Range
High-Performance WR-4.3 Optically Controlled Variable Attenuator With 60-dB Range
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DOI：
10.1109/lmwc.2018.2823589
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发表时间：
2018-06
影响因子：
3
通讯作者：
Jun Ren;Zhenguo Jiang;P. Fay;J. Hesler;C. Tong;Lei Liu
中科院分区：
文献类型：
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作者：
Jun Ren;Zhenguo Jiang;P. Fay;J. Hesler;C. Tong;Lei Liu
我们报告的设计，制造和表征的高性能光控WR-4.3可变衰减器。衰减是基于入射波和光生自由载流子之间的相互作用的E-平面微加工硅吸收体。调谐是通过使用三个808 nm红外激光二极管用不同的光强度照射硅来实现的。测量结果表明，60 dB的平均衰减范围，0.7 dB的插入损耗，和大于15 dB的回波损耗已经实现了在整个WR-4.3波段。此外，3-dB的调制带宽为350 kHz的实验已获得。对器件进行了初步的热稳定性测试，在30 min的演示时间内，幅度漂移小于0.4 dB，相位漂移小于2°。
We report the design, fabrication, and characterization of a high-performance optically controlled WR-4.3 variable attenuator. The attenuation is based on the interaction between the incident waves and photogenerated free carriers inside an E-plane micromachined silicon absorber. Tuning is realized by illuminating the silicon with different light intensities using three 808-nm infrared laser diodes. Measurement results show that an average attenuation range of 60 dB, a 0.7-dB insertion loss, and a greater than 15-dB return loss have been achieved over the entire WR-4.3 band. In addition, a 3-dB modulation bandwidth of 350 kHz has been obtained experimentally. Initial thermal stability test of the device has also been performed, with less than 0.4-dB amplitude drift and 2° drift in phase over 30-min demonstration.