Chang Wei-Cheng, Lin Ja-Hon, Liao Ting-Yu, Yang Chin-Yi
Opt Express. 2018 Nov 26;26(24):31808-31816. doi: 10.1364/OE.26.031808.
A noise-like pulse (NLP) with broadband emission spectrum and superior beam quality from a dispersion managed mode-locked Yb-doped fiber laser has been demonstrated based on stimulated Raman scattering. After insertion of a 150 m long single mode fiber into the laser cavity, the second order stoke wave from 1.3 MHz repetition rate of NLP can be excited. With a 320 mW pump power, the highest pulse energy of NLP was about 35.1 nJ and the emission spectrum was extended from 1000 to 1160 nm. Through a multi-mode fiber laser, the broad bandwidth NLP can produce relatively low speckle noise imaging with contrast below 0.04. The generated NLPs can be used as a superior light source for the biomedical diagnosis and laser projection in the near future.
基于受激拉曼散射，已证明一种具有宽带发射光谱和优异光束质量的类噪声脉冲（NLP）可从色散管理锁模掺镱光纤激光器产生。在激光腔内插入一段150米长的单模光纤后，可激发NLP 1.3MHz重复频率的二阶斯托克斯波。在320毫瓦泵浦功率下，NLP的最高脉冲能量约为35.1纳焦，发射光谱从1000纳米扩展到1160纳米。通过多模光纤激光器，宽带NLP可产生对比度低于0.04的相对低散斑噪声成像。在不久的将来，所产生的NLP可作为生物医学诊断和激光投影的优质光源。
