The authors showcase a photonic integrated circuit chip for fast optical frequency variation measurement, fabricated with thin-film lithium niobate, with a size of 5.5 mm × 2.7 mm, a speed up to 2500 THz/s, a resolution of 2 MHz, and a range of 160 nm.
- X. Steve Yao
- Yulong Yang
- Xinlun Cai
