Patent ID: 6690709
Filing Date: 2004-02-10
Classification: H01S

Abstract:
A light outcoupling device for outcoupling of light in an external cavity laser having an external cavity extending between at least one light source and at least one wavelength selective feedback element, the light outcoupling device comprising:at least one polarization selective beam-splitting optical element, and at feast one Faraday-rotator element optically coupled to said polarization selective beam-splitting optical element, said polarization selective beam-splitting optical element being functionally arranged to fully transmit a linearly polarized light propagating in a first direction, and wherein the wavelength selective feedback element has a polarization function and is optically coupled to the polarization beam-splitting optical element such that the linearly polarized light incident thereon provides the selective feedback with substantially optimum efficiency, and is at least partly outcoupled from the external cavity by the polarization selective beam-splitting optical element when the linearly polarized light is propagating in a second direction.