Abstract: An adjustable laser light beamsplitter and fiber optic coupler apparatus and method comprising a plurality of splitter modules placeable into an optical path, each module comprising: a splitter to split off a selectable portion of an incident polarized laser beam; a fiber coupler to capture the split-off portion into an optical fiber; and a beam transmitter element to transmit a remainder of the incident beam to serve as an incident polarized laser beam for any subsequent splitter module.