Higher-order mode fiber enables high energy chirped-pulse amplification
Xiang Peng,Kyungbum Kim,Michael Mielke,Timothy Booth,Jeffrey W. Nicholson,John M. Fini,Xiaoping Liu,Anthony DeSantolo,Paul S. Westbrook,Robert S. Windeler,Eric M. Monberg,F. V. Dimarcello,C. Headley,David J. DiGiovanni +13 more
TLDR
A breakthrough in pulse energy from a monolithic fiber chirped pulse amplification system using higher-order mode propagation generating 300 µJ pulses with duration <500 fs (FWHM) and peak power >600 MW at 1.55 µm is shown.Abstract:
Energy scaling of femtosecond fiber lasers has been constrained by nonlinear impairments and optical fiber damage. Reducing the optical irradiance inside the fiber by increasing mode size lowers these effects. Using an erbium-doped higher-order mode fiber with 6000 µm2 effective area and output fundamental mode re-conversion, we show a breakthrough in pulse energy from a monolithic fiber chirped pulse amplification system using higher-order mode propagation generating 300 µJ pulses with duration 600 MW at 1.55 µm. The erbium-doped HOM fiber has both a record large effective mode area and excellent mode stability, even when coiled to reasonable diameter. This demonstration proves efficacy of a new path for high energy monolithic fiber-optic femtosecond laser systems.read more
Citations
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Designing advanced very-large-mode-area fibers for power scaling of fiber-laser systems
Fabian Stutzki,Florian Jansen,Hans-Jürgen Otto,Cesar Jauregui,Jens Limpert,Andreas Tünnermann +5 more
TL;DR: In this paper, the benefits of using higher-order mode delocalization as the working principle of active double-clad VLMA fibers are described, and a new low-symmetry large-pitch fiber is proposed and thoroughly analyzed.
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Raman fiber lasers
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Extreme large mode area in single-mode pixelated Bragg fiber.
Jean-Paul Yehouessi,Olivier Vanvincq,Andy Cassez,Marc Douay,Yves Quiquempois,Géraud Bouwmans,Laurent Bigot +6 more
TL;DR: The design and the fabrication of an all-solid photonic bandgap fiber with core diameter larger than 100 µm, a record effective mode area of about 3700 µm2 at 1035 nm and robust single-mode behavior on propagation length as short as 90 cm are reported.
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Holographically encoded volume phase masks
TL;DR: In this paper, a method to create spectrally addressable phase masks by encoding phase profiles into volume Bragg gratings, allowing these holographic elements to be used as phase masks at any wavelength capable of satisfying the Bragg condition of the hologram, is presented.
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Spatially-resolved Rayleigh scattering for analysis of vector mode propagation in few-mode fibers.
Fredrik K. Fatemi,Guy Beadie +1 more
TL;DR: Direct imaging of Rayleigh scattered light through the side of few-mode optical fibers to measure the local spatial structure of propagating vector fields and gives high-resolution beat length measurements, but also records the local propagation dynamics including those due to perturbations.
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