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Proceedings Paper

Sub-150 fs all-fiber polarization maintaining tunable laser in the mid-infrared
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Paper Abstract

Nowadays, the request for femtosecond lasers operating between 1.7 μm and 2 μm is continuously growing for many applications. Mode-locked Holmium- or Thulium-doped fiber lasers based on Saturable Absorber Mirror (SAM) are typically the first approach to generate pulses in this spectral range but this technique suffers from a lack of tunability. Indeed, the operating wavelength is fixed by the SAM and the gain fiber. Another way to reach the 2 μm-spectral range consists to exploit the nonlinear phenomena appearing in optical fibers and in particular the Soliton-Self Frequency Shift (SSFS) effect from an Erbium-fiber laser. Several systems based on this phenomenon allowed the generation of ultrashort pulses at different wavelengths and in different type of fibers (step-index, PCF, …). In this paper, we report on the design of a compact and robust all-Polarization-Maintaining (PM) fiber system entirely based on commercial PM components. This system allows to generate a single femtosecond pulse continuously tunable from 1700 nm to 2050 nm. We also demonstrate that the sub-150 fs pulses are transform-limited over all the spectral range and thanks to an optimized rate conversion close to 50 %, the pulse energy and the peak power can reach the nJclass and the kW-class respectively, which represents a gain of a factor 2 compared to the previous works.

Paper Details

Date Published: 21 February 2020
PDF: 6 pages
Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112601M (21 February 2020); doi: 10.1117/12.2543740
Show Author Affiliations
P. Morin, ALPhANOV (France)
S. Boivinet, ALPhANOV (France)
J.-P. Yehouessi, ALPhANOV (France)
T. Berberian, Lab. Charles Fabry, Institut d'Optique Graduate School, Univ. Paris-Saclay, CNRS (France)
Amplitude Laser Group (France)
F. Druon, Lab. Charles Fabry, Institut d'Optique Graduate School, Univ. Charles Fabry, CNRS (France)
S. Vidal, ALPhANOV (France)
G. Machinet, ALPhANOV (France)
F. Guichard, Lab. Charles Fabry (France)
Y. Zaouter, Amplitude Laser Group (France)
J. Boullet, ALPhANOV (France)

Published in SPIE Proceedings Vol. 11260:
Fiber Lasers XVII: Technology and Systems
Liang Dong, Editor(s)

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