High-coherence hybrid-integrated 780 nm source by self-injection-locked second-harmonic generation in a high-Q silicon-nitride resonator
- Resource Type
- Working Paper
- Authors
- Li, Bohan; Yuan, Zhiquan; Jin, Warren; Wu, Lue; Guo, Joel; Ji, Qing-Xin; Feshali, Avi; Paniccia, Mario; Bowers, John E.; Vahala, Kerry J.
- Source
- Subject
- Physics - Optics
- Language
By self-injection-locking a 1560 nm distributed feedback semiconductor laser to a high-$Q$ silicon nitride resonator, a high-coherence 780 nm second harmonic signal is generated via the photogalvanic-induced second-order nonlinearity. A record-low frequency noise floor of 4 Hz$^2$/Hz is achieved for the 780 nm emission. The approach can be generalized for signal generation over a wide range of visible and near-visible bands.