Broadband Mid-IR On-Chip Fourier-Transform Spectrometer

摘要

We present a new FTS approach that harnesses both spatial heterodyning and thermo-optical path tuning to overcome the resolution-bandwidth tradeoff in conventional counterparts. We experimentally demonstrate a mid-infrared SiGe FTS, with a resolution exceeding 15 cm⁻¹ in a wide bandwidth of 603 cm⁻¹.