High Resolving Power and Highly Compact Arrayed Waveguide Grating with Reusable Delay Lines (RDL-AWG)

Arrayed waveguide grating with reusable delay lines (RDL-AWGs) with a resolving power of 28,000 is experimentally demonstrated. The device is roughly 70 times more compact than the traditional AWG, which reduces the phase errors caused by uniformity and improves the performance of the spectrometer.