Generation of cylindrical vector beams in a mode-locked fiber laser using a mode-selective coupler

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2018,（1）
• 页码范围: 11-15
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201816.010602

摘要

We experimentally obtain cylindrical vector beams (CVBs) in a passively mode-locked fiber laser based on non-linear polarization rotation.A mode-selective coupler composed of both a single-mode fiber (SMF) and a two-mode fiber (TMF) is incorporated into the cavity to act as a mode converter from LP0 1 mode to LP 11 mode with broad spectral bandwidth.CVBs in different mode-locked states including single-pulse,multi-pulse,and bound pulse are obtained,for the first time to our best knowledge.The ultrafast CVBs with different operation states have potential applications in many fields such as laser beam machining,nanoparticle manipulation,and so on.