Patent ID: 9209605
Filing Date: 2015-12-08
Classification: H01S

Abstract:
1. A laser diode subassembly comprising: an array of M laser diode emitters disposed for emitting M light sub-beams propagating in a common first plane, wherein each laser diode emitter has a sequential array index from 1 to M in the array of M laser diode emitters; an array of M dichroic reflectors, wherein each dichroic reflector has a sequential array index from 1 to M in the array of M dichroic reflectors, wherein each dichroic reflector is disposed in the common first plane to reflect a light sub-beam of a laser diode emitter having a same array index and to transmit light sub-beams from other laser diode emitters having lower array indices, if any, thereby forming an optical beam, wherein the M dichroic reflectors comprise low-pass reflectors or high-pass reflectors, each dichroic reflector having a corresponding edge wavelength, wherein the edge wavelengths of the M dichroic reflectors are monotonically increasing or decreasing, respectively, with the dichroic reflector's array index; and a partial reflector disposed downstream of the array of M dichroic reflectors in an optical path of the optical beam and arranged to reflect a portion of each light sub-beam comprising the optical beam to propagate back to its originating laser diode emitter, thereby forming a laser cavity for each one of the M laser diode emitters.