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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 23, Iss. 8 — Aug. 1, 2005
  • pp: 2555–

Sagnac Loop in Ring Resonators for Tunable Optical Filters

Carmen Vázquez, Salvador Elías Vargas, and José Manuel Sánchez Pena

Journal of Lightwave Technology, Vol. 23, Issue 8, pp. 2555- (2005)


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Abstract

General filter architecture using co-and counterpropagation signals are studied. A specific configuration based on a Sagnac loop within a ring resonator is analyzed. Novel tuning, apart from conventional tuning,is achieved by changing the coupling ratio of a coupler through the adjustment of the equivalent loop length. Full equations describing the filter behavior in passive and active configurations, and simple closed-form formulas to compute the tuning, tolerance, and full-width at half-maximum are reported. The performance of these devices is discussed for their application as selective or channel-dropping ultra-narrow-band filters. The effect of losses and their dispersion properties are also discussed. These devices can be conveniently implemented, using silicon-or InP-integrated optic technology, for they have high free spectral ranges.

© 2005 IEEE

Citation
Carmen Vázquez, Salvador Elías Vargas, and José Manuel Sánchez Pena, "Sagnac Loop in Ring Resonators for Tunable Optical Filters," J. Lightwave Technol. 23, 2555- (2005)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-23-8-2555

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