Spectrum Collapse and Kerr Frequency Comb Generation with Multi-Frequency Laser Diodes Self-Injection Locked to High-Q Optical Microresonator

Compact narrow-linewidth lasers and effective generators of optical frequency combs are important tools of modern optics, photonics and spectroscopy. In this work we present unique method to produce high-power single-frequency emission with sub-kHz linewidth [1] due to the self-injection locking effect [2] and soliton comb generation from the compact multi-frequency diode laser locked to high-Q optical microresonator [3].