Multiwavelength passively mode-locked fiber laser with ultra-broad bandwidth

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• 作者：Xing Li^a ; ^b ; ^{lixing1@nbu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jianping Chen^c ; Shixun Dai^a ; ^b
• 关键词：Multiwavelength lasers ; Passively mode-locked ; Er-doped fiber lasers ; Birefringence filter
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：127
• 期：20
• 页码：10036-10041
• 全文大小：1513 K

文摘

We demonstrate a stable multiwavelength passively mode-locked erbium-doped fiber laser with ultra-narrow wavelength spacing and ultra-broad bandwidth. It is realized by exploiting an intracavity birefringence-induced comb filter and inhomogeneous loss mechanism based on nonlinear polarization rotation. Stable 808-line wavelength lasing with wavelength spacing of 0.07 nm and 3-dB bandwidth of 55.75 nm is achieved at room temperature. If 5-dB bandwidth of 86.15 nm is considered, the number of the lasing lines reaches 1248. In addition, the lasing wavelength lines and spacing could be flexibly tuned by modifying polarization-dependent cavity loss via properly rotating the waveplates.