Near-octave lithium niobate soliton microcomb
Abstract
Thin film lithium niobate (LN) is bringing renewed potential to the realm of integrated photonics. Its strong quadratic and cubic nonlinearities as well as wide transparency window are ideal for realizing on-chip self-referenced soliton microcombs. However, broadband Kerr cavity soliton generation in LN thin films remains challenging due to limited dispersion control and competition from strong stimulated Raman scattering (SRS). Here, we demonstrate the generation of soliton microcombs in LN thin films featuring broad spectral spans up to 4/5 octaves with the emission of dual dispersion waves (2/3 octaves apart) and sub-terahertz repetition rates (down to 335 GHz) by suppressing strong SRS. Numerical simulations based on coupled-mode equations that incorporate Raman effects further elucidate the soliton dynamics in this highly Raman-active material system.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 28, 2020
- Source ID
- 10.1364/optica.400994
Entities
People
- Hong X Tang
- Xianwen Liu
- Yuntao Xu
- Zheng Gong
Organizations
- David and Lucile Packard Foundation
- Defense Advanced Research Projects Agency
- Sandia National Laboratories