Pulse-to-pulse wavelength switching of a nanosecond fiber laser by four-wave mixing seeded stimulated Raman amplification

Optics Letters
Matthias EiblRobert Huber

Abstract

We report on a multi-color fiber laser based on four-wave mixing (FWM) and stimulated Raman scattering (SRS), delivering rapidly wavelength switchable narrowband output at 1064, 1122, and 1186 nm. High-power pulses from a nanosecond pulsed fiber master oscillator power amplifier at 1064 nm are combined with 1122 nm of seed light for Raman amplification at the first Stokes order in a standard single-mode fiber. With increasing power, we observe a narrowband spectral component at 1186 nm, without any additional seed or resonator at this wavelength. We analyze this occurrence of a narrowband second Stokes order both experimentally and theoretically and suggest it is a result of FWM seeding of the SRS amplification in the fiber. We demonstrate that the wavelength shifting can be controlled electronically within microseconds for very rapid and even pulse-to-pulse wavelength changes. This wavelength conversion method can extend the spectral coverage of single-wavelength fiber lasers for biomedical imaging.

References

Apr 16, 2007·Optics Express·Jean-Philippe FèveDahv A V Kliner
Jan 7, 2010·Optics Express·Yan FengDomenico Bonaccini Calia
Jan 15, 2014·Nature Photonics·C Xu, F W Wise
Jun 13, 2014·Optics Express·Hanwei ZhangXiaojun Xu
Apr 18, 2015·Nature Communications·Sebastian KarpfRobert Huber
Jul 26, 2016·Biomedical Optics Express·Sebastian KarpfRobert Huber
Jul 19, 2017·Biomedical Optics Express·Matthias EiblRobert Huber

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Citations

May 9, 2019·Biomedical Optics Express·Matthias EiblSebastian Karpf
Jul 7, 2020·Optics Letters·Sebastian Karpf, Bahram Jalali

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