Patent ID: 9160142
Filing Date: 2015-10-13
Classification: H01S

Abstract:
1. A laser comprising: a laser chip having a plurality of active laser channels, a front facet for coupling out the laser radiation of the laser channels and a rear facet for rear-side reflection of the laser radiation of the laser channels in the direction of the front facet; an external resonator which couples a portion of the radiation exiting the laser chip at the front facet back into the laser chip and, by said back-coupling, couples the radiation of the laser channels with one another; wherein at least one of the laser channels is curved at least sectionally and—in the far field—in addition to a main beam, at least one secondary beam is divergently emitted by the laser chip; wherein the resonator reflects at least one of the secondary beams, which is—in the far field—divergently emitted by the laser chip next to the main beam, in the direction of the laser chip; and wherein the curvature of the laser channels is configured such that, without the back-coupling of the resonator, no fixed phase relationship between neighboring laser channels occurs and no mode is preferred owing to chip-internal coupling of the laser channels, and the mode present in the laser chip is determined by the back-coupling of the resonator.