期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 55, 期 14, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac4365
关键词
quantum-dot; mode-locked laser; optical frequency combs
资金
- Royal Academy of Engineering
- China Scholarship Council
- EPSRC [EP/P006973/1] Funding Source: UKRI
In this work, a passive two-section InAs/InGaAs quantum-dot (QD) MLL-based OFC with a fundamental repetition rate of around 100 GHz operating at O-band wavelength range is presented. The device is specially designed to generate nearly Fourier-transform-limited pulses in the entire test range by only pumping the gain section while with the absorber unbiased. The experimental results demonstrate the feasibility of InAs QD MLLs as a simple structure, easy operation, and low power consumption OFC sources for high-speed fibre-optic communications.
Semiconductor mode-locked lasers (MLLs) with extremely high repetition rates are promising optical frequency comb (OFC) sources for their usage as compact, high-efficiency, and low-cost light sources in high-speed dense wavelength-division multiplexing transmissions. The fully exploited conventional C- and L- bands require the research on O-band to fulfil the transmission capacity of the current photonic networks. In this work, we present a passive two-section InAs/InGaAs quantum-dot (QD) MLL-based OFC with a fundamental repetition rate of similar to 100 GHz operating at O-band wavelength range. The specially designed device favours the generation of nearly Fourier-transform-limited pulses in the entire test range by only pumping the gain section while with the absorber unbiased. The typical integrated relative intensity noise of the whole spectrum and a single tone are -152 and -137 dB Hz(-1) in the range of 100 MHz-10 GHz, respectively. Back-to-back data transmissions for seven selected tones have been realised by employing a 64 Gbaud four-level pulse amplitude modulation format. The demonstrated performance shows the feasibility of the InAs QD MLLs as a simple structure, easy operation, and low power consumption OFC sources for high-speed fibre-optic communications.
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