Cladding-pumped Raman fiber laser with 0.78% quantum defect enabled by phosphorus-doped fiber. (10th January 2022)

• Record Type: Journal Article
• Authors: Ma, Xiaoya; Xu, Jiangming; Ye, Jun; Zhang, Yang; Huang, Liangjin; Yao, Tianfu; Leng, Jinyong; Pan, Zhiyong; Zhou, Pu
• Is Part Of: High power laser science and engineering. Volume 10(2022)
• Publication Date: 2022-01-10
• Subjects: cladding pumping -- low quantum defect -- phosphorus-doped fiber -- Raman fiber laser; High power lasers -- Periodicals; 621.366
• DOI: 10.1017/hpl.2021.60
• Languages: English
• ISSNs: 2095-4719

Abstract

Abstract: The quantum defect (QD) is an important issue that demands prompt attention in high-power fiber lasers. A large QD may aggravate the thermal load in the laser, which would impact the frequency, amplitude noise and mode stability, and threaten the security of the high-power laser system. Here, we propose and demonstrate a cladding-pumped Raman fiber laser (RFL) with QD of less than 1%. Using the Raman gain of the boson peak in a phosphorus-doped fiber to enable the cladding pump, the QD is reduced to as low as 0.78% with a 23.7 W output power. To our knowledge, this is the lowest QD ever reported in a cladding-pumped RFL. Furthermore, the output power can be scaled to 47.7 W with a QD of 1.29%. This work not only offers a preliminary platform for the realization of high-power low-QD fiber lasers, but also proves the great potential of low-QD fiber lasers in power scaling.