An electro-optically tunable optical filter

The invention claims for filtering optical signal method and device. The method comprises a receiving at least input optical signal; and at least input optical signal to form first and second optical signal, and using multiple non-waveguide electric phase regulators to use at least a portion of the first optical signal. The method - comprising a wherein the first optical signal, comprising the first optical signal at least a correction part, and second optical signal, combined by the output optical signal.