Disclosed is a laser module comprising: a housing having a platform (a - g, h - n); one or more laser sources (303) secured to the platform; optical components to direct radiation from the one or more lasers to an endcap (1505), the endcap being positionally secured to a structure in the platform; an optical fiber (1506) secured inside the housing to the endcap (1505); an epoxy coating applied to a cladding of the optical fiber (1506) inside the housing, wherein a refractive index of the coating is the same or greater than a refractive index of the cladding.