For semiconductor lasers VCSEL structures are well known for their high beam quality, low cost of fabrication and single mode operation. These attributes make them interesting for optical communication and applications were fiber coupling is necessary. Since the cavity length in these structures is only on the order of the wavelength the optical amplification per round trip is small and the losses have to be as small as possible. Only dielectric mirrors can be produced with high enough reflectivity (> 99.9%) to make lasing possible. By using organic molecules in these structures we want to achieve easy tunable laser emission with high beam quality in the range of 400 nm.
letzte Änderung: 21.09.2015 id