Tunable dual-comb spectroscopy in a single asynchronous vector soliton fiber laser
Year: 2026
Authors: Jing XH., Zhang CX., Zha XY., Lyu H., Li BH., Zhang CY., Zhang CH., Fu B.
Autors Affiliation: Beihang Univ, Sch Instrumentat & Optoelect Engn, Key Lab Precis Optomechatron Technol, Minist Educ, Beijing 100191, Peoples R China; Beihang Univ, Hangzhou Int Innovat Inst, Hangzhou 311115, Peoples R China; CNR, INO Ist Nazl Ott, Via Carrara 1, I-50019 Sesto Fiorentino, Italy; LENS European Lab Nonlinear Spect, Via Carrara 1, I-50019 Sesto Fiorentino, FI, Italy.
Abstract: Dual-comb spectroscopy is an advanced method for high-resolution and rapid measurement. Tunable dual combs are beneficial for diverse spectroscopy applications. For single-cavity dual combs, wide tunability is difficult to accomplish due to their completely identical physical paths. In this work, we investigate tunable dual-comb spectroscopy in a single asynchronous vector soliton fiber laser, overcoming the tuning difficulty by carefully designing the multiplexing mechanism. The tuning range is from 198 to 3940 Hz of repetition frequency difference and 8.7 MHz of carrier-envelope-offset frequency difference, where we report the widest repetition-frequency-difference tuning among such kinds of dual combs. When tuning the carrier-envelope-offset frequency difference to move the down-conversion RF spectrum away from half of the repetition frequency, characteristics of asynchronous solitons had noticeable changes, causing a decrease in the repetition-frequency-difference jitter and improvement in the measurement accuracy. Our work provides strong evidence and a promising way to trace the origin of dual-comb measurement errors in a single asynchronous soliton fiber laser. (c) 2026 Chinese Laser Press
Journal/Review: PHOTONICS RESEARCH
Volume: 14 (6) Pages from: 2513 to: 2522
More Information: Funding. National Natural Science Foundation of China (52527901) ; Natural Science Foundation of Beijing Municipality (1252023) ; Fundamental Research Funds for the Central Universities (2025087124805) ; College Students’ Innovative Entrepreneurial Training Plan Program.DOI: 10.1364/PRJ.589100
