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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 21847–21859

Dynamic response of modulators based on cascaded-ring-resonator

Suguru Akiyama and Shintaro Nomura  »View Author Affiliations


Optics Express, Vol. 20, Issue 20, pp. 21847-21859 (2012)
http://dx.doi.org/10.1364/OE.20.021847


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Abstract

We investigated the dynamic response of a cascaded-ring-resonator-loaded Mach–Zehnder modulator (CRR-MZM), in which a number of cascaded ring resonators (RRs) are loaded in the interferometer as phase modulators. The analytical form is derived for the small-signal response of CRR-MZM using temporal-coupled-mode (TCM) theory, and its validity is confirmed by numerical calculations. It is revealed that the bandwidth of the CRR-MZM is maximized by setting proper delays in driving signals between neighboring RRs; the optimized delay is twice the photon lifetime of each RR. The calculated performances of CRR-MZMs are compared with those of standard modulators based on a single-ring-resonator (SRR) without interferometer, in terms of the modulation depth and bandwidth. For a given degree of the refractive index change in a waveguide, CRR-MZM can provide a larger modulation depth than a SRR-type modulator in frequency ranges exceeding 25 GHz.

© 2012 OSA

OCIS Codes
(230.5750) Optical devices : Resonators
(250.5300) Optoelectronics : Photonic integrated circuits
(250.7360) Optoelectronics : Waveguide modulators
(250.4110) Optoelectronics : Modulators

ToC Category:
Optoelectronics

History
Original Manuscript: July 5, 2012
Revised Manuscript: August 23, 2012
Manuscript Accepted: August 23, 2012
Published: September 10, 2012

Citation
Suguru Akiyama and Shintaro Nomura, "Dynamic response of modulators based on cascaded-ring-resonator," Opt. Express 20, 21847-21859 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-20-21847


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