Narrow band radiation emitting laser

摘要

In a narrow band radiation-emitting laser having a group of wavelength-selective refractive elements (32, 34) in the beam path for deflecting incident light by respective angles ( psi a, psi b) which are specific to the incident light wavelength, at least one element (32) has a refractive index which increases with increasing temperature and at least one element (34) has a refractive index which decreases with increasing temperature.