Broadband quantum-dot frequency-modulated comb laser
arXiv:2306.15125 · doi:10.1038/s41377-023-01225-z
Abstract
Frequency-modulated (FM) laser combs, which offer a periodic quasi-continuous-wave output and a flat-topped optical spectrum, are emerging as a promising solution for wavelength-division multiplexing applications, precision metrology, and ultrafast optical ranging. The generation of FM combs relies on spatial hole burning, group velocity dispersion (GVD), Kerr nonlinearity, and four-wave mixing (FWM). While FM combs have been widely observed in quantum cascade Fabry-Perot (FP) lasers, the requirement for a low-dispersion FP cavity can be a challenge in platforms where the waveguide dispersion is mainly determined by the material. Here we report a 60 GHz quantum-dot (QD) mode-locked laser in which both the amplitude-modulated (AM) and the FM comb can be generated independently. The high FWM efficiency of -5 dB allows the QD laser to generate an FM comb efficiently. We also demonstrate that the Kerr nonlinearity can be practically engineered to improve the FM comb bandwidth without the need for GVD engineering. The maximum 3-dB bandwidth that our QD platform can deliver is as large as 2.2 THz. This study gives novel insights into the improvement of FM combs and paves the way for small-footprint, electrically-pumped, and energy-efficient frequency combs for silicon photonic integrated circuits (PICs).
References in corpus (13)
- Parallel convolution processing using an integrated photonic tensor core
- Frequency comb spectroscopy
- An Integrated-Photonics Optical-Frequency Synthesizer
- Massively parallel coherent laser ranging using soliton microcombs
- Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high- microresonators
- Optical data transmission at 44Tb/s and 10 bits/s/Hz over the C-band with standard fibre and a single micro-comb source
- Laser soliton microcombs on silicon
- High-channel-count 20 GHz passively mode locked quantum dot laser directly grown on Si with 4.1 Tbit/s transmission capacity
- Theory of frequency modulated combs in lasers with spatial hole burning, dispersion and Kerr
- Coherent injection locking of quantum cascade laser frequency combs
- In-phase and anti-phase synchronization in a laser frequency comb
- Single-mode instability in standing-wave lasers: The quantum cascade laser as a self-pumped parametric oscillator
- Self-generation of optical frequency comb in single section Quantum Dot Fabry-Perot lasers: a theoretical study
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