Frontiers of Optoelectronics, Volume. 9, Issue 3, 399(2016)
Large-range tunable fractional-order differentiator based on cascaded microring resonators
In this paper, we experimentally demonstrate an all-optical continuously tunable fractional-order differentiator using on-chip cascaded electrically tuned microring resonators (MRRs). By changing the voltage applied on a MRR, the phase shift at the resonance frequency of the MRR varies, which can be used to implement tunable fractional-order differentiator. Hence fractional-order differentiator with a larger tunable range can be obtained by cascading more MRR units on a single chip. In the experiment, we applied two direct current voltage sources on two cascaded MRRs respectively, and a tunable order range of 0.57 to 2 have been demonstrated with Gaussian pulse injection, which is the largest tuning range to our knowledge.
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Ting YANG, Shasha LIAO, Li LIU, Jianji DONG. Large-range tunable fractional-order differentiator based on cascaded microring resonators[J]. Frontiers of Optoelectronics, 2016, 9(3): 399
Category: RESEARCH ARTICLE
Received: Oct. 30, 2015
Accepted: Dec. 28, 2015
Published Online: Nov. 23, 2016
The Author Email: DONG Jianji (jjdong@mail.hust.edu.cn)