Spectrally tunable phase-biased NALM mode-locked Yb:fiber laser with nJ-level pulse energy

Author:

Ebrahimzadeh SaeidORCID,Adnan Sakib,Li Yishen,Pecile Vito FORCID,Fellinger Jakob,Salman Sarper,Heyl Christoph M,Hartl Ingmar,Heckl Oliver H,Porat Gil

Abstract

Abstract Applications of mode-locked fiber lasers benefit from robust and self-starting mode-locking, spectral tuning, high pulse energy and high average power. All-polarization-maintaining (PM) fiber lasers mode-locked with a phase-biased nonlinear amplifying loop mirror (NALM) have been shown to be very robust and reliably self-starting, and provide either spectral tuning or high pulse energy, but not both. We report on a simple method for concurrent spectral tuning and nanojoule-level pulse energy scaling of an all-PM phase-biased NALM mode-locked Yb:fiber laser, which we demonstrate over a 54 nm tuning range, reaching up to 1.67 nJ pulse energy and 126 mW average power. Unlike other laser configurations, our results show that net normal dispersion is not necessary or optimal for scaling the pulse energy of this type of mode-locked fiber laser.

Funder

Austrian Science Fund, FWF

Christian Doppler Research Association

The Government of Canada’s New Frontiers in Research

Natural Sciences and Engineering Research Council of Canada

The National Foundation for Research, Technology and Development

NSERC Alliance-Alberta Innovates Advance

Canada Foundation for Innovation John R. Evans Leaders Fund

Quantum Major Innovation Fund Project

the Government of Alberta’s Small Equipment Grant

The Austrian Federal Ministry of Labour and Economy

Quantum City

Publisher

IOP Publishing

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