Low-power-consumption integrated tunable filters for WDM switching applications in silicon photonics

Manganelli, C.;Velha, P.;Pintus, P.;Gambini, F.;Lemonnier, O.;Adelmini, L.;Kopp, C.;Faralli, S.;Di Pasquale, F.;Wenger, C.;Oton, C. J.

2018-01-01

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Abstract

We present the experimental results of thermally tunable double microring resonator devices for integrated wavelength division multiplexing applications. The devices demonstrated a free-spectral range up to 2.4 THz (19.2 nm) around 1550 nm and a channel rejection higher than 35 dB. Using Ti/TiN metal heaters, a power consumption of 20 mW per FSR per ring is achieved, which outperformed analogous devices fabricated using the standard silicon process. A thermal tuning efficiency of 0.95 nm/mW is accomplished, and a symmetric tuning is obtained with less than 1% of electrical compensation.