TUNEABLE, ADJUSTMENT-STABLE SEMICONDUCTOR LASER LIGHT SOURCE AND A METHOD FOR THE OPTICALLY STABLE, LARGELY CONTINUOUS TUNING OF SEMICONDUCTOR LASERS

摘要

The preferably highly antireflection coated facet of a laser chip is imaged by an optical system onto a reflector, as a result of which the adjustment tolerance is substantially increased by the cat's eye effect and, since the optical system is provided with a high longitudinal chromatic aberration, the wavelength can be tuned by shifting given parts of the total system relative to other parts of the total system. In this way a tunable semiconductor laser light source which is free from mode jumps and has at most two adjustable degrees of freedom can be produced.