Spectral and temporal dynamics of ultrashort pulses in a holmium-doped fibre amplifier

We have optimised a hybrid mode-locked holmium-doped fibre laser and a holmium-doped fibre amplifier for obtaining stable pulses as short as possible. Temporal and spectral characteristics of pulsed light have been measured as functions of pump power. Lasing has been achieved in the wavelength range...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2019-12, Vol.49 (12), p.1108-1111
Main Authors: Filatova, S.A., Kamynin, V.A., Zhluktova, I.V., Trikshev, A.I., Arutyunyan, N.R., Rybin, M.G., Obraztsova, E.D., Batov, D.T., Voropaev, V.S., Tsvetkov, V.B.
Format: Article
Language:English
Subjects:
AMPLIFIERS
Autocorrelation functions
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Doped fibers
DOPED MATERIALS
EMISSION SPECTRA
Fiber lasers
FIBERS
HOLMIUM
holmium-doped fibre amplifier
holmium-doped fibre laser
hybrid mode-locking
LASERS
mode-locking
nonlinear polarisation rotation
Pulse duration
PULSES
PUMPING
single-walled carbon nanotubes
spectral transformation
ultrashort pulses
WAVELENGTHS
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Summary:We have optimised a hybrid mode-locked holmium-doped fibre laser and a holmium-doped fibre amplifier for obtaining stable pulses as short as possible. Temporal and spectral characteristics of pulsed light have been measured as functions of pump power. Lasing has been achieved in the wavelength range 2066 - 2068 nm, with a full width at half maximum of the emission spectrum from 3 to 4 nm. The pulse duration does not exceed 1 ps and the pulse energy ranges from 0.2 to 0.5 nJ. To raise the pulse energy, holmium-doped fibre amplifiers based on two types of active fibre have been used. We have demonstrated a decrease in the width of the central part of the pulse autocorrelation function and considerable broadening of the spectrum of the pulses. The maximum average power at the amplifier output exceeds 200 mW.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL17162