Characteristics of 1.9 um laser emission from hydrogen filled hollow core fiber by stimulated Raman scattering

Bo Gu; Yubin Chen; Zefeng Wang

doi:10.1117/12.2246080

3 November 2016 Characteristics of 1.9 μm laser emission from hydrogen-filled hollow-core fiber by stimulated Raman scattering

Bo Gu, Yubin Chen, Zefeng Wang

Author Affiliations +

Proceedings Volume 10029, Quantum and Nonlinear Optics IV; 1002919 (2016) https://doi.org/10.1117/12.2246080
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

We report here the detailed characteristics of 1.9 μm laser emission from hydrogen-filled hollow-core fiber by stimulated Raman scattering. A 6.5 m hydrogen-filled Ice-cream negative curvature hollow-core fiber is pumped with a high peak power, narrow linewidth, liner polarized subnanosecond pulsed 1064 nm microchip laser, generating pulsed 1908.5 nm vibrational Stokes wave. The linewidth of the pump laser and the vibrational Stokes wave is about 1 GHz and 2 GHz respectively. And the maximum Raman conversion quantum efficiency is about 48%. We also studied the pulse shapes of the pump laser and the vibrational Stokes wave. The polarization dependence of the vibrational and the rotational stimulated Raman scattering is also investigated. In addition, the beam profile of vibrational Stokes wave shows good quality, which may be taken advantage of in many applications.

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Bo Gu, Yubin Chen, and Zefeng Wang "Characteristics of 1.9 μm laser emission from hydrogen-filled hollow-core fiber by stimulated Raman scattering", Proc. SPIE 10029, Quantum and Nonlinear Optics IV, 1002919 (3 November 2016); https://doi.org/10.1117/12.2246080

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KEYWORDS

Fiber lasers

Polarization

Pulsed laser operation

Raman scattering

Laser scattering

Raman spectroscopy

Hydrogen

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