Figure 3

Schematic of all micro-optic splitter/combiners employed in the laser system. (a) 1 × 3 micro-optic splitter with an internal shutter before splitting, to shutter all beams simultaneously. This is used to split the 2D MOT light. (b) 1 × 3 micro-optic splitter with internal shutters after splitting, to shutter all beams separately. This is used to split light from Repump/Raman 1 when tuned to the repump transition. (c) 2 × 3 micro-optic splitter/combiner for combining two beams together, in the same polarization, into a PM fiber. This device is for the bottom three beams of the 3D MOT, with the repump frequency combined into the beams. (d) 1 × 3 micro-optic splitter. This variant is used to split a beam for the upper three beams of the 3D MOT. (e) 1 × 3 micro-optic splitter with AOMs and internal shutters after splitting, for amplitude and frequency control of each beam. This is the device that gives control over the 3D MOT beams and detection. (f) 2 × 3 micro-optic splitter/combiner with shutters. This variant serves two purposes, to split/combine the Raman frequencies together into two fibers as well as manage a modest pick off to send repump light to other splitter/combiners, namely (b) and (c). (g) Photo of a hermetically sealed, configuration (c) micro-optic module. Bottom right; a key for optical components.