Large-range tunable fractional-order differentiator based on cascaded microring resonators
| Ting YANG,Shasha LIAO,Li LIU,Jianji DONG* |
| Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan 430074, China |
| AbstractIn 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.Keywords all-optical devices optical differentiator optical signal processing Corresponding Authors: Jianji DONG Just Accepted Date: 03 August 2016 Online First Date: 06 September 2016 Issue Date: 28 September 2016 |
| Cite this article: |
| Ting YANG,Shasha LIAO,Li LIU, et al. Large-range tunable fractional-order differentiator based on cascaded microring resonators[J]. Front. Optoelectron., 2016, 9(3): 399-405. |
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