This is a miniaturized optics table showing a fiber-connected beam multiplexor. The table is about 16" x 20" with holes along any row or column at 1" intervals. The table is encased in a laser-safe box for the 780 nm wavelength, but allows viewing at shorter, visible wavelengths
The blue cables are fiber optics that carry the light into and out of the box.

Near each fiber port is a pairing of a waveplate and polarizing beamsplitter, which sets the amount of light to be split into each arm. The original light is divided up on the "L" into two sets of three beams, for the up and down trapping/launching beams, with leftover light sent to the "I" to generate the detection and repumping frequencies.