Low-threshold 1.9 µm Raman generation in microstructured hydrogen-filled hollow-core revolver fibre with nested capillaries. (19th December 2016)

• Record Type: Journal Article
• Authors: Gladyshev, A V; Kolyadin, A N; Kosolapov, A F; Yatsenko, Yu P; Pryamikov, A D; Biriukov, A S; Bufetov, I A; Dianov, E M
• Is Part Of: Laser physics. Volume 27:Number 2(2017:Feb.)
• Publication Date: 2016-12-19
• Subjects: hollow-core fibre -- fiber laser -- Raman conversion; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1555-6611/aa4f88
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: Efficient Raman laser based on the revolver hollow-core fibre (HCF) with a cladding formed by one layer of double nested capillaries was realized for the first time. Using hydrogen gas as a nonlinear medium we demonstrated single-pass single-stage 1064 nm–1907 nm Raman conversion with quantum efficiency as high as 40%. Improved mode confinement in the hollow core and low optical losses of the fibre enabled us to achieve Raman threshold as low as 270 W of peak power, which is 4–7 times improvement compared to previously reported results on 1.9 µ m Raman generation in other types of HCFs. Further progress in revolver fibre technology could be a promising way to develop low-threshold, efficient, compact gas fibre lasers for various applications in the mid-infrared spectral range.