Mode-Locking with Ultra-Low Intra-Cavity Pulse Intensity Using Enhanced Kerr Nonlinearity

Mallachi Elia Meller; Shai Yefet; Avi Pe'er

doi:10.1109/jqe.2017.2670544

Mode-Locking with Ultra-Low Intra-Cavity Pulse Intensity Using Enhanced Kerr Nonlinearity

Mallachi Elia Meller, Shai Yefet, Avi Pe'er

Department of Physics

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Kerr lens mode locking strongly depends upon intensity. Low pulse intensity weakens the nonlinear Kerr lens, and eventually mode locking is not supported. We demonstrate efficient mode-locking in a Ti:Sapphire laser oscillator with record-low intra-cavity pulse intensity (18 GW/cm²) and intra-cavity average power (340 mW). Using an additional nonlinear window in the cavity, the Kerr nonlinearity can be enhanced by an order of magnitude compared to the standard Ti:Sapphire cavity, allowing mode locking with an output coupler reflectivity as low as R = 55% and record-low intra-cavity pulse intensity. Our results provide an important new possibility to control mode-locking in cavities with very low intra-cavity pulse intensity, such as semiconductor laser oscillators and high-repetition rate mode-locked lasers.

Original language	English
Article number	7857685
Journal	IEEE Journal of Quantum Electronics
Volume	53
Issue number	2
DOIs	https://doi.org/10.1109/jqe.2017.2670544
State	Published - Apr 2017

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Funding

This work was supported by the Israel Science Foundation under Grant 807/09, 46/14.

Funders	Funder number
Israel Science Foundation	807/09, 46/14

Keywords

Titanium-sapphire lasers
laser mode locking
ultrafast nonlinear optics

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10.1109/jqe.2017.2670544

Cite this

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abstract = "Kerr lens mode locking strongly depends upon intensity. Low pulse intensity weakens the nonlinear Kerr lens, and eventually mode locking is not supported. We demonstrate efficient mode-locking in a Ti:Sapphire laser oscillator with record-low intra-cavity pulse intensity (18 GW/cm2) and intra-cavity average power (340 mW). Using an additional nonlinear window in the cavity, the Kerr nonlinearity can be enhanced by an order of magnitude compared to the standard Ti:Sapphire cavity, allowing mode locking with an output coupler reflectivity as low as R = 55% and record-low intra-cavity pulse intensity. Our results provide an important new possibility to control mode-locking in cavities with very low intra-cavity pulse intensity, such as semiconductor laser oscillators and high-repetition rate mode-locked lasers.",

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Mode-Locking with Ultra-Low Intra-Cavity Pulse Intensity Using Enhanced Kerr Nonlinearity

Abstract

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Keywords

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