Wavelength sensitive device for wavelength stabilization

A device for stabilizing the operating wavelength () of an electro-optical component having a nominal operating wavelength (0) by a wavelength influencing circuit adapted to be driven by a control signal. The device comprises a semiconductor photodiode adapted to be impinged upon by the radiation generated and/or processed by the component and to generate an output signal which is indicative of a difference of the wavelength of the radiation (() with respect to the nominal operating wavelength (0, i). The semiconductor photodiode includes a plurality of layers jointly defining two opposite diodes generating opposite photocurrents as a result of radiation impinging onto the photodiode. The opposite photocurrents are adapted to generate the control signal to effect the stabilization action.