Effective Kerr lens mode locking in Er3+:ZBLAN fiber laser with phase mismatched periodically poled lithium niobate

L.N. Zhao; X.H. Cao; L.Y. Tong; S.W. Huang; Y.J. Cai

Results in Physics (Jan 2024)

Effective Kerr lens mode locking in Er3+:ZBLAN fiber laser with phase mismatched periodically poled lithium niobate

L.N. Zhao,
X.H. Cao,
L.Y. Tong,
S.W. Huang,
Y.J. Cai

Affiliations

L.N. Zhao: College of Physics and Electronics, Center of Light Manipulations and Applications, Shandong Provincial Key Laboratory of Optics and Photonic Device, Shandong Normal University, Jinan 250358, China; Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan 250358, China; Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East China Normal University and Shandong Normal University, East China Normal University, Shanghai 200241, China; Department of Electrical, Computer, and Energy Engineering, University of Colorado Boulder, Boulder, CO 80309, USA; Corresponding author.
X.H. Cao: College of Physics and Electronics, Center of Light Manipulations and Applications, Shandong Provincial Key Laboratory of Optics and Photonic Device, Shandong Normal University, Jinan 250358, China; Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan 250358, China
L.Y. Tong: College of Physics and Electronics, Center of Light Manipulations and Applications, Shandong Provincial Key Laboratory of Optics and Photonic Device, Shandong Normal University, Jinan 250358, China; Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan 250358, China
S.W. Huang: Department of Electrical, Computer, and Energy Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
Y.J. Cai: College of Physics and Electronics, Center of Light Manipulations and Applications, Shandong Provincial Key Laboratory of Optics and Photonic Device, Shandong Normal University, Jinan 250358, China; Collaborative Innovation Center of Light Manipulation and Applications, Shandong Normal University, Jinan 250358, China; Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East China Normal University and Shandong Normal University, East China Normal University, Shanghai 200241, China

Journal volume & issue: Vol. 56
p. 107235

Abstract

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We theoretically introduce an effective Kerr lens mode locking concept to a polarization maintaining (PM) Er3+:ZBLAN fiber laser and generate a stable femtosecond pulse train at 2.76 µm. Phase-mismatched periodically poled lithium niobate (PPLN) is utilized to implement cascaded second order nonlinearities (CSN) for the effective Kerr lens mode locking. Furthermore, the CSN in the PPLN can be tuned to balance the huge fiber anomalous dispersion for femtosecond soliton formation in the mid-infrared regime. High coupling efficiency of light into fiber, shorter effective focal length of PPLN and larger effective nonlinear refractive index are essential for enhancing intracavity peak power and shortening pulse duration. The pulse could be compressed down to 311 fs with output pulse energy of 1.36 nJ and peak power of 3.6 kW. This mode locking method provides deep insight into direct generation of femtosecond fiber laser in mid-infrared regime.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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