Self-Locking of Free-Running DFB Lasers to a Single Microring Resonator for Dense WDM
We self-injection locked two free-running DFB lasers to two adjacent resonances of microring resonators (MRRs) to enhance the lasers frequency spacing stability. The frequency spacing stability between the two locked lasers was <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$< $</tex-math></inline-formula>300 MHz while locking to a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\sim$</tex-math></inline-formula>0.5 million Q microring with <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\sim$</tex-math></inline-formula>19.6 GHz free spectral range (FSR), improving to <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$< $</tex-math></inline-formula>100 MHz level after locking to a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\sim$</tex-math></inline-formula>1.5 million Q microring with <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\sim$</tex-math></inline-formula>25.2 GHz FSR. The locked lasers were modulated with dual polarisation 16-QAM signals with <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$< $</tex-math></inline-formula>1 GHz guard-band between two channels, and the MRR locked DFB lasers achieved similar performance to commercial external cavity lasers in the coherent communication system.
Authors
- Arnan Mitchell (ORCID: https://orcid.org/0000-0002-2463-2956)
- Roberto Morandotti (ORCID: https://orcid.org/0000-0001-7717-1519)
- Bill Corcoran (ORCID: https://orcid.org/0000-0001-8653-3999)
- Sai T. Chu (ORCID: https://orcid.org/0000-0001-8263-8507)
- Xiaotian Zhu (ORCID: https://orcid.org/0000-0002-9306-5131)
- David Moss (ORCID: https://orcid.org/0000-0001-5195-1744)
- James Salamy (ORCID: https://orcid.org/0000-0001-6708-1966)
- Caitlin E. Murray (ORCID: https://orcid.org/0009-0003-9802-0922)
- Yonghang Sun (ORCID: https://orcid.org/0009-0001-7559-7046)
- Brent E. Little
Institutions
- City University of Hong Kong (HK)
- Xilinx (United States) (US)
- Institut National de la Recherche Scientifique (CA)
- Monash University (AU)
- Swinburne University of Technology (AU)
- RMIT University (AU)
Publication Details
- Journal
- Journal of Lightwave Technology
- Published
- 2024-11-08
- DOI
- https://doi.org/10.1109/jlt.2024.3494694
- Citations
- 7
- Primary Topic
- Photonic and Optical Devices
- Type
- article
- Field-Weighted Citation Impact
- 1.46