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High-order tunable filters based on a chain of coupled crystalline whispering gallery-mode resonators

2004; Institute of Electrical and Electronics Engineers; Volume: 17; Issue: 1 Linguagem: Inglês

10.1109/lpt.2004.836906

1941-0174

Anatoliy A. Savchenkov, Vladimir S. Ilchenko, Andrey B. Matsko, Lute Maleki,

Advanced Photonic Communication Systems

We demonstrate experimentally a tunable third-order optical filter fabricated from the three voltage-controlled lithium niobate whispering gallery-mode resonators. The filter operates at 1550 nm with 30-MHz bandwidth and can be electrooptically tuned by 12 GHz in the linear regime with approximately 80-MHz/V tuning rate. With this filter, we have demonstrated 6-dB fiber-to-fiber insertion loss and 30-ns tuning speed, limited by the resonator buildup time.