武汉工程大学学报2025，Vol.47Issue(2)：210-217,8.DOI:10.19843/j.cnki.CN42-1779/TQ.202403032
商用光纤产生高能低噪声平坦可见光超连续谱的设计
High-energy low-noise flat visible supercontinuum spectrum generation in commercial optical fibers
摘要
Abstract
Visible supercontinuum spectrum(SC)is an important component of atomic optical frequency standards,and is directly used for measurement,conversion,and transmission of various optical frequencies.To meet the application requirements of optical frequency standards with stability at the 10-18 level,we proposed an effective design for high-energy,low-noise,flat visible SC generation using commercial optical fibers based on numerical iterative simulation algorithms.Selecting a polarization-maintaining photonic crystal fiber(NL-PM-1050-NEG)at 780 nm wavelength,200 fs pulse width,300 kW peak power,and 15 cm pump length,the gain saturation from stimulated Raman scattering and four-wave mixing coupling suppresses noise amplification,successfully inhibiting incoherent broadening.The resulted visible SC spans 456-1 526 nm,with a 7 dB flatness,an approximately 60 nJ spectral energy,and average coherence factor and relative intensity noise of 1 and 0.11%,respectively.This visible SC has high phase coherence,low intensity noise,and notable spectral flatness,covers a spectral range of three octaves,and has a spectral energy several times higher.Using a photonic crystal fiber commercially reduces costs and development time compared to custom-made fibers.关键词
可见光超连续谱/商用光纤/高能量/低噪声/平坦度Key words
visible supercontinuum spectrum/commercial optical fibers/high-energy/low-noise/flatness分类
电子信息工程引用本文复制引用
杨超凡,邹凡,金锐博,刘阔,刘泽川,吴浩煜..商用光纤产生高能低噪声平坦可见光超连续谱的设计[J].武汉工程大学学报,2025,47(2):210-217,8.基金项目
国家自然科学基金(11904112,92365106,12074299) （11904112,92365106,12074299）
武汉工程大学科学研究基金(K202255) （K202255）
湖北省自然科学基金(2022CFA039) （2022CFA039）
