VCSEL COMPRISING A TEMPERATURE-ADJUSTED LYOT FILTER CONSISTING OF A POLARISER AND A FREQUENCY-DOUBLED CRYSTAL

摘要

The invention relates to a laser arrangement (1) comprising an active region (20) for generating radiation of a fundamental wavelength, a resonator (3), and an optically non-linear element (4) with a crystal axis (40). A polarisation-selective element (5) is formed inside the resonator (3), such that a polarisation of the radiation with the fundamental wavelength propagating in the resonator has a privileged direction. The optically non-linear element (4) is provided for at least partially converting the radiation with the fundamental wavelength into frequency-converted radiation. The optically non-linear element is also provided for a quasi-phase-matching of the radiation with the fundamental wavelength to the frequency-converted radiation. The crystal axis (40) of the optically non-linear element (4) forms an acute angle with the privileged direction.