2005
DOI: 10.1109/jlt.2005.850793
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Sagnac loop in ring resonators for tunable optical filters

Abstract: 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… Show more

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Cited by 23 publications
(18 citation statements)
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“…Those values are obtained from drop and through port amplitude transfer functions [16] using a transmission matrix framework to express the various couplings and using MATLAB in the simulations. It can be seen how k 3 value only affects through port rejection ratio (RR), meanwhile most critical parameter designs are k 2 and k 1 .…”
Section: Circuit Designmentioning
confidence: 99%
“…Those values are obtained from drop and through port amplitude transfer functions [16] using a transmission matrix framework to express the various couplings and using MATLAB in the simulations. It can be seen how k 3 value only affects through port rejection ratio (RR), meanwhile most critical parameter designs are k 2 and k 1 .…”
Section: Circuit Designmentioning
confidence: 99%
“…Recently, a RR with SG loop filte (RR-SG), as the one shown in third block of Fig. 9a, has been reported as a second order tunable optical filte with ultra-narrow-bandwidth for use in DWDM systems [41] or as part of a novel filte design technique [42]. It can also be used for designing tunable dispersion compensation modules (DCMs) by changing the value of the coupling factor k, and to achieve higher order designs in combination with other FIR filters In Fig.…”
Section: Tunable CD Compensation With a Sagnac Loop In Ring Resonatorsmentioning
confidence: 99%
“…If that is not the case, a switch matrix would be given (with ), and then it should be pruned in order to remove the unnecessary switches to get exactly what is needed for ports. In order to get more compact designs in the future, those switches can also be implemented on the same chip using ring resonators [14].…”
Section: (A)mentioning
confidence: 99%