Journal of Semiconductors>>2017,Volume 38>>Issue 12:126001-4    < Previous Article | Next Article >  
Lihong Zhang, Shuqian Sun, Ming Li and Ninghua Zhu.All-optical temporal fractional order differentiator using an in-fiber ellipsoidal air-microcavity[J].Journal of Semiconductors,2017,38(12):126001-4
All-optical temporal fractional order differentiator using an in-fiber ellipsoidal air-microcavity
Abstract: An all-optical temporal fractional order differentiator with ultrabroad bandwidth (~1.6 THz) and extremely simple fabrication is proposed and experimentally demonstrated based on an in-fiber ellipsoidal air-microcavity. The ellipsoidal air-microcavity is fabricated by splicing a single mode fiber (SMF) and a photonic crystal fiber (PCF) together using a simple arc-discharging technology. By changing the arc-discharging times, the propagation loss can be adjusted and then the differentiation order is tuned. A nearly Gaussian-like optical pulse with 3 dB bandwidth of 8 nm is launched into the differentiator and a 0.65 order differentiation of the input pulse is achieved with a processing error of 2.55%.
Keywords: optical signal processing  optical differentiator  in-fiber ellipsoidal air-microcavity
Author NameAffiliation
Lihong Zhang State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China 
Shuqian Sun State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
Ming Li State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
Ninghua Zhu State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 
 
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