Patent ID: 7794159

Claim:
A beam coupler assembly for a fiber laser, comprising: a housing having a sidewall with an interior surface, an exterior surface, a first end and a second end; a first seal extending from the interior surface of the housing and dividing the housing into a first section and a second section, the first section and second section being environmentally isolated from one another, the first seal being substantially optically neutral; an input collimator unit received within the first end of the sidewall of the housing and into the first section and releasably coupled thereto; and an output collimator unit received within the second end of the sidewall of the housing and into the second section and releasably coupled thereto; a flange extending from the exterior surface of the sidewall of the housing; and a shroud coupled to said flange and enclosing said output collimator unit, the shroud including a plurality of closable apertures therethrough.