Broadband quantum-dot frequency-modulated comb laser

Bozhang Dong; Mario Dumont; Osama Terra; Heming Wang; Andrew Netherton; John E. Bowers

doi:10.1038/s41377-023-01225-z

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Broadband quantum-dot frequency-modulated comb laser

Original Articles

- Broadband quantum-dot frequency-modulated comb laser
- Light: Science & Applications Vol. 12, Issue 8, Pages: 1696-1707(2023)
- Affiliations：
  
  1.Institute for Energy Efficiency, University of California, Santa Barbara, CA, USA
  2.Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA, USA
  3.Present address: Primary Length and Laser Technology Lab, National Institute of Standards, Giza, Egypt
- Author bio：
  
  Bozhang Dong (bdong@ucsb.edu)
  John E. Bowers (bowers@ece.ucsb.edu)
- Funds：
- DOI：10.1038/s41377-023-01225-z
  CLC：
- Published：31 August 2023，
  
  Published Online：25 July 2023，
  
  Received：12 April 2023，
  
  Revised：06 July 2023，
  
  Accepted：09 July 2023
- Accepted：
Scan QR Code
Dong, B. Z. et al. Broadband quantum-dot frequency-modulated comb laser. Light: Science & Applications, 12, 1696-1707 (2023).
DOI：

Dong, B. Z. et al. Broadband quantum-dot frequency-modulated comb laser. Light: Science & Applications, 12, 1696-1707 (2023). DOI： 10.1038/s41377-023-01225-z.

摘要

Abstract

Frequency-modulated (FM) laser combs

which offer a 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

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 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).

关键词

Keywords

references

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