Title :
Analysis of negative group delay response of all-pass ring resonator with Mach-Zehnder interferometer
Author :
Takahashi, Hidenori ; Carlsson, Patrick ; Nishimura, Kohsuke ; Usami, Masashi
Author_Institution :
KDDI R&D Labs. Inc., Saitama, Japan
Abstract :
The chromatic dispersion characteristics of waveguide all-pass filters were theoretically analyzed, in which the round-trip loss of a ring resonator was taken into account. Although an all-pass filter based on a ring resonator is lossless in principle, a finite round-trip loss of an actual filter changes an amplitude response and a group delay response drastically. The negative group delay resonance peak was confirmed both theoretically and experimentally.
Keywords :
Mach-Zehnder interferometers; optical directional couplers; optical dispersion; optical filters; optical losses; optical resonators; optical waveguides; Mach-Zehnder interferometer; all-pass ring resonator; chromatic dispersion; finite round trip loss; negative group delay resonance; negative group delay response; ring resonator; round-trip loss; waveguide all-pass filter; Chromatic dispersion; Delay; Directional couplers; Feedback loop; Frequency; Optical filters; Optical ring resonators; Optical scattering; Optical waveguides; Resonator filters;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.832603