Patent ID: 8824518
Filing Date: 2014-09-02
Classification: H01S

Abstract:
1. Vertical-Cavity Surface-Emitting Laser with a stripe-shaped active medium having an emission maximum at a first wavelength, wherein a first reflector is arranged below the stripe-shaped active medium and a second reflector is arranged above the stripe-shaped active medium, with the first reflector facing the second reflector, wherein the first reflector and the second reflector have a maximum reflectivity in a region of the first wavelength, wherein a third reflector and a fourth reflector are each arranged on a side above or next to the stripe-shaped active medium, wherein the third reflector faces the fourth reflector, and wherein the third reflector and the fourth reflector have a maximum reflectivity in a region of a second wavelength, wherein the first wavelength is greater than the second wavelength, wherein the stripe-shaped active medium is uniformly formed over an entire area comprised between the third and the fourth reflectors, wherein the reflectors from the group: the first reflector, the second reflector, the third reflector and the fourth reflector are each constructed as a Bragg reflector, wherein the first reflector and the second reflector each have a reflectivity of greater than 99% for the first wavelength, the third reflector and the fourth reflector each have a reflectivity of greater than 60% for the second wavelength, and the reflectivity of the first reflector for the first wavelength is greater than the reflectivity of the second reflector for the first wavelength, and further wherein a width of reflection band of the first and second reflectors is about 100 nm at the first wavelength, a width of reflection band of the third and fourth reflectors is less than 10 nm at the second wavelength, and the reflection band of each reflector corresponds to a region where the reflectivity is greater than 50% of the maximum reflectivity at the respective wavelength.