Fig. 2: Schematics of the integrated-optics chip.
From: Scalable photonic-based nulling interferometry with the dispersed multi-baseline GLINT instrument
a Schematics of the pupil remapper of the chip, coherently transforming the 2D configuration of the inputs (on the left) matching the desired pupil sampling pattern into a 1D configuration (on the right). The waveguide paths have been optimised to match their optical path lengths despite their different routes. The green waveguide is associated with beam 1, orange with beam 2, red with beam 3 and blue with beam 4. b Perspective view of the beam combiner of the chip. c Plan view in which light propagates from the 4 inputs at the bottom towards the top, encountering 4-way splitters and codirectional couplers. d Right-side view of the chip showing the locations of the inputs and the outputs. The inputs, outputs, splitters and couplers are indicated on the (b–d) diagrams. The axis scale proportions in all the schematics differ for clarity in the drawing.
