Arrangement of multiple diode laser module and method for operating the same

A laser module, comprising:

• a base comprising a first and second plurality of stepped platforms, each of the first and second plurality of platforms hosting a laser source and a reflector wherein the reflector receives radiation from the laser source and reflects radiation, wherein the laser source in each of the first and second plurality of platforms emits radiation in a first direction;
• each reflector in the first plurality of platforms being aligned in a first plane, and each reflector in the second plurality of platforms being aligned in a second plane, wherein the first and second plane are different planes and the second plane is a greater distance from each of the laser sources than the first plane;
• and
• an optical combiner that combines the radiation of the plurality of laser sources into a single beam that is inputted into an optical fiber.

A method of combining radiation in a laser module, comprising:

• emitting radiation with a plurality of laser sources on first and second stepped platforms, each of the plurality of laser sources radiating in a first direction;
• generating a first set of radiation beams by reflecting radiation from each of the plurality of laser sources associated with the first stepped platforms with a first plurality of reflectors of which each is located in a first plane, in a second direction perpendicular to the first direction;
• generating a second set of radiation beams by reflecting radiation from each of the plurality of lasers in the second stepped platform with a second plurality of reflectors located in a second plane, in a third direction that is generally opposite from the second direction;
• generating a third set of radiation beams by reflecting the first set of radiation beams with a reflector;
• generating combined radiation by combining the second set of radiation beams and the third set of radiation with a combiner into a single beam that is inputted into an optical fiber.

A laser module, comprising:

• a housing having a platform;
• one or more laser sources secured to the platform;
• optical components to direct radiation from the one or more lasers to an endcap, the endcap being positionally secured to a structure in the platform;
• an optical fiber secured inside the housing to the endcap;
• an epoxy coating applied to a cladding of the optical fiber inside the housing, wherein a refractive index of the coating is the same or greater than a refractive index of the cladding.