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

Matthias Eibl, Sebastian Karpf, Hubertus Hakert, Torben Blömker, Jan Philip Kolb, Christian Jirauschek, Robert Huber*

*Corresponding author for this work
3 Citations (Scopus)

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.

Original languageEnglish
JournalOptics Letters
Volume42
Issue number21
Pages (from-to)4406-4409
Number of pages4
ISSN0146-9592
DOIs
Publication statusPublished - 01.11.2017

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