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All-fiber bidirectional optical modulator derives from the microfiber coated with ITO electrode
Optics Letters ( IF 3.6 ) Pub Date : 2021-05-13 , DOI: 10.1364/ol.426577
Pingping Teng , Meng Luo , Xinghua Yang , Danheng Gao , Nigel Copner , Zhihai Liu , Jun Yang , Zhanao Li , Shuai Gao , Kang Li , Mark Bowkett , Libo Yuan

A cheap, compact, and simply prepared all-fiber bidirectional optical modulator based on the Pockels effect of water and the band population effect was first, to the best of our knowledge, proposed and demonstrated. The transparent conductive oxide indium-tin-oxide (ITO) was coated on the surface of a nonadiabatic microfiber and first used as a modulating electrode on the microfiber. The device was realized by just submerging the microfiber in water. With supplying an electric field perpendicular to the interface between the microfiber and water, the refractive index was modulated in the electric double layer near the tapered region of the microfiber, under the Pockels effect of water. Subsequently, the interference spectrum was modulated. Meanwhile, the intensity of the light was modulated due to the band population effect in the space-charge layer. In this Letter, the proposed all-fiber optical modulator can realize simultaneous bidirectional modulation of the phase and intensity of output light. Experimentally, the maximum phase shift and the extinction ratio were 4.38 nm and 4.87 dB at 1550 nm, respectively. Significantly, the work used the Pockels effect of water and the band population effect to realize an all-fiber optical modulator, showing great potential in the optical phase modulators, optical switches, and electric field sensors.

中文翻译:

全光纤双向光调制器源自涂有ITO电极的超细纤维

据我们所知,首先提出并证明了一种廉价,紧凑,制备简单的全光纤双向光调制器,该调制器基于水的普克尔斯效应和能级效应。将透明导电氧化物铟锡氧化物(ITO)涂覆在非绝热微纤维的表面上,并首先用作微纤维上的调制电极。该设备是通过将超细纤维浸入水中而实现的。通过提供垂直于微纤维和水之间的界面的电场,在水的普克尔效应的作用下,在微纤维的锥形区域附近的双电层中调节了折射率。随后,干涉光谱被调制。同时,由于空间电荷层中的能带填充效应,光的强度得到了调节。在这封信中,提出的全光纤光调制器可以实现输出光的相位和强度的同时双向调制。实验上,在1550 nm处,最大相移和消光比分别为4.38 nm和4.87 dB。值得注意的是,这项工作利用了水的普克尔斯效应和能级效应来实现全光纤光调制器,在光相位调制器,光开关和电场传感器中显示出巨大的潜力。分别。值得注意的是,这项工作利用了水的普克尔斯效应和能级效应来实现全光纤光调制器,在光相位调制器,光开关和电场传感器中显示出巨大的潜力。分别。值得注意的是,这项工作利用了水的普克尔斯效应和能级效应来实现全光纤光调制器,在光相位调制器,光开关和电场传感器中显示出巨大的潜力。
更新日期:2021-05-14
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