Wavelength Selective External Resonator and Beam Combining System for Dense Wavelength Beam Combining Laser

A beam wavelength stabilizing system comprising:

• a laser source having a plurality of emitters that each emit a laser beam;
• a wavelength filtering element;
• and
• a reflective element;
• wherein each laser beam emitted by the plurality of emitters has a single wavelength,
• wherein the wavelength filtering element is disposed between the laser source and the reflective element,
• wherein the reflective element directs a portion of the optical power emitted by the laser source at the wavelength filtering element such that the portion of the optical power emitted by the laser source and directed at the wavelength filtering element interacts with the wavelength filtering and is directed into the laser source as feedback.

A method for stabilizing the wavelengths of each of a plurality of beams, each beam emitted by a single emitter of a laser source comprising a plurality of emitters, the method comprising:

• directing, as a feedback component, a portion of each of the plurality of beams through a beam wavelength stabilization system;
• directing the feedback component at a wavelength filtering element;
• directing the feedback component at a reflective element;
• and
• directing, for each beam of the feedback component, a reflection of the beam from the reflective element into the emitter that emitted the beam.

A method for producing a combined output beam formed of components of a plurality of emitted beams, each emitted beam emitted by a single emitter in a laser source having a plurality of beam emitters, the method comprising:

• directing, as a feedback component, a portion of each of the plurality of emitted beams into a feedback branch;
• directing, as an output component, a portion of each of the plurality of emitted beams at a beam combining element arranged outside the wavelength stabilization system;
• directing each feedback component at a wavelength filtering element;
• directing each feedback component at a reflective element;
• and
• directing, for each beam of the feedback component, a reflection of the beam into the beam emitter that emitted the beam.