Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 35,
  • Issue 24,
  • pp. 5347-5360
  • (2017)

Cascading Second-Order Microring Resonators for a Box-Like Filter Response

Not Accessible

Your library or personal account may give you access

Abstract

We demonstrate an optical filter using multistage of second-order microring resonators (2nd-order MRRs) for a box-like filter response. All stages have identical structure parameters elaborately designed to obtain a flat-top spectrum. The maximally flat condition is deduced in consideration of loss and compared with those reported in literature. We present the insertion loss, extinction ratio, bandwidth, and roll-off rate of the maximally flat response. We find that for the flat response of a 2nd-order MRR, the product of bandwidth and roll-off rate is constant. We compare the cascading 2nd-order MRRs with single-stage high-order filters with the same number of ring cavities. We find that the cascading structure has comparable performances in the aspects of insertion loss and roll-off rate for small radius. This cascading structure relaxes the fabrication tolerance and mitigates the difficulty of electrical wiring difficulty since there are only two ring cavities in each stage. As a proof of concept, we fabricate this kind of optical filter with ten stages on silicon-on-insulator platform, with each ring cavity tunable and each stage measurable. We obtain five flat-top responses corresponding to one to five cascading stages. The five-stage filter response has a 3 dB bandwidth of ∼17 GHz, a roll-off rate of ∼−5 dB/GHz at −3 dB point, and an on-chip insertion loss of ∼−6 dB.

PDF Article
More Like This
High-order microring resonators with bent couplers for a box-like filter response

Pengxin Chen, Sitao Chen, Xiaowei Guan, Yaocheng Shi, and Daoxin Dai
Opt. Lett. 39(21) 6304-6307 (2014)

Box-like filter response using multimode single-ring microresonators

Salwa El-Sabban, Amr Wageeh, and Diaa Khalil
Appl. Opt. 55(2) 408-414 (2016)

FSR-free silicon-on-insulator microring resonator based filter with bent contra-directional couplers

Nourhan Eid, Robert Boeck, Hasitha Jayatilleka, Lukas Chrostowski, Wei Shi, and Nicolas A. F. Jaeger
Opt. Express 24(25) 29009-29021 (2016)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved