Beam coupler alignment system and method

A focus adjustable collimator unit for a fiber laser, comprising:

• an outer housing configured to secure an optical fiber thereto;
• an inner housing received within the outer housing;
• the inner housing further comprising a concentric coupler housing assembly and an adjustably retained lens housing received therein;
• and
• an asymmetric adjustment mechanism configured and arranged between the outer housing and the lens housing to releasably and adjustably bind the lens housing relative to an inner surface of the coupler housing assembly during a focus alignment of the system.

A method for adjusting a collimator unit for a fiber laser, comprising the steps of:

• securing an optical fiber to an outer housing;
• the outer housing further comprising an inner housing received therein and the inner housing further comprising:
• a concentric coupler housing assembly and an adjustably retained lens housing received therein relative to a common central axis;
• and
• an adjustment mechanism configured and arranged between the outer housing and the lens housing to adjustably hind the lens housing relative to the coupler housing assembly during an alignment of the system in an asymmetric manner;
• adjusting a X axis alignment;
• adjusting a Y axis alignment;
• operating the adjustment mechanism to place the lens housing in a releasable bind position on an interior surface of the coupler housing so as to fax the X axis adjustment and the Y axis adjustment;
• and
• adjusting a Z axis alignment to achieve a focus of the fiber laser, whereby the method enables a concentric alignment of an output of the fiber laser with the lens housing in a simple manner.