We present a new electro-optic (EO) tunable bandpass filter design based on a long-period-grating-assisted asymmetric waveguide coupling mechanism. A narrow passband width of <0.2 nm and a large wavelength tuning range exceeding 30 nm can be obtained at a low driving voltage of ~16 V. This type of EO tunable filter would form key building blocks in dynamic wavelength division multiplexing (WDM) optical networks.
We present an electro-optically (EO) tunable filter design. The EO tunable filter is capable of nanosecond wavelength tuning across the whole C band with a narrow pass band of <0.4nm and a low channel cross-talk of <-30dB. This EO filter can be used in dynamic WDM networks for fast wavelength scanning/selection, communication channel reconfiguration, and optical switching.
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