Lasers, Fiber Optics, and Communications

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

[+] Author Affiliations
Bo Gu, Yubin Chen, Zefeng Wang

National University of Defense Technology, College of Optoelectronic Science and Engineering, No. 109, Deya Road, Kai Fu District, Changsha 410073, China

Opt. Eng. 55(12), 126114 (Dec 29, 2016). doi:10.1117/1.OE.55.12.126114
History: Received September 2, 2016; Accepted December 7, 2016
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Abstract.  We report here the characteristics of 1.9-μm laser emission from a gas-filled hollow-core fiber by stimulated Raman scattering (SRS). A 6.5-m hydrogen-filled ice-cream negative curvature hollow-core fiber is pumped with a high peak-power, narrow linewidth, linearly polarized subnanosecond pulsed 1064-nm microchip laser, generating a pulsed vibrational Stokes wave at 1908.5 nm. The maximum quantum efficiency of about 48% is obtained, which is mainly limited by the mode mismatch between the pump laser beam and the Stokes wave in the hollow-core fiber. The linewidths of the pump laser and the first-order vibrational Stokes wave are measured to be about 1 and 2 GHz, respectively, by a scanning Fabry–Perot interferometer. The pressure selection phenomenon of the vibrational anti-Stokes waves is also investigated. The pulse duration of the vibrational Stokes wave is recorded to be narrower than that of the pump laser. The polarization properties of the hollow-core fiber and the polarization dependence of the vibrational and the rotational SRS are also studied. The beam profile of the vibrational Stokes wave shows good quality.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Bo Gu ; Yubin Chen and Zefeng Wang
"Characteristics of 1.9-μm laser emission from hydrogen-filled hollow-core fiber by vibrational stimulated Raman scattering", Opt. Eng. 55(12), 126114 (Dec 29, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.126114


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