We proposed and experimentally demonstrated an all-fiber structured wavelength-tunable second-order optical temporal differentiator based on a linearly chirped fiber Bragg grating and a digital-controlled thermal array. The central frequency of the differentiation can be reconfigured from 192.141 to 192.616 THz by a programmable circuit. In the experiment, a second-order differentiator with 3 dB bandwidth of 0.086 THz is achieved with a root mean square error of 4.89%.
© 2014 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: December 18, 2013
Revised Manuscript: February 19, 2014
Manuscript Accepted: March 4, 2014
Published: March 25, 2014
Hailiang Zhang, Ming Tang, Yiwei Xie, Songnian Fu, Deming Liu, and Perry Ping Shum, "Programmable wavelength-tunable second-order optical temporal differentiator based on a linearly chirped fiber Bragg grating and a digital thermal controller," Opt. Lett. 39, 2004-2007 (2014)