Optimization of a supercontinuum source based on tapered ordinary fibers

Černe, Luka; Novak, Jure; Agrež, Vid; Petkovšek, Rok

doi:10.1088/1555-6611/aaf640

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…The combined pulse train is then amplified in two fiber amplification stages and one solid-state amplification stage. The solid-state amplification stage is needed to reduce the undesired nonlinear effects that occur due to high pulse intensities in the fiber amplifiers due to small core diameters of optical fibers [39]. The beam size in the solid-state amplifier is much larger compared to the fiber core size, which allows for additional pulse amplification with negligible nonlinear effects [40].…”

Section: Shg-based Separationmentioning

confidence: 99%

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Petelin

Černe

Mur

et al. 2021

Advanced Optical Technologies

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In this manuscript we present a true pulse-on-demand laser design concept using two different approaches. First, we present a fiber master oscillator power amplifier (MOPA) based quasi-continuous wave (CW) laser, working at high modulation bandwidths, for generation of nanosecond pulses. Second, we present a hybrid chirped pulse amplification (CPA)-based laser, combining a chirped-pulse fiber amplifier and an additional solid-state amplifier, for generation of femtosecond pulses. The pulse-on-demand operation is achieved without an external optical modulator/shutter at high-average powers and flexible repetition rates up to 40 MHz, using two variants of the approach for near-constant gain in the amplifier chain. The idler and marker seed sources are combined in the amplifier stages and separated at the out using either wavelength-based separation or second harmonic generation (SHG)-generation-based separation. The nanosecond laser source is further applied to high throughput processing of thin film materials. The laser is combined with a resonant scanner, using the intrinsic pulse-on-demand operation to compensate the scanner’s sinusoidal movement. We applied the setup to processing of indium tin oxide (ITO) and metallic films on flexible substrates.

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Section: Shg-based Separationmentioning

confidence: 99%

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Petelin

Černe

Mur

et al. 2021

Advanced Optical Technologies

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“…The laser pulses generated at arbitrary repetition rates with a duration of several 10 s of nanoseconds and peak power in the kilowatt range are suitable for applications such as direct colour marking, micromachining, laser-transfer printing, selective photocoagulation, etc. In contrast, such pulses are too long to achieve cold ablation [19], where bursts of picosecond pulses [20] and [21] are used to efficiently ablate the material, supercontinuum generation [22] or applications for which high-speed, high-resolution micromachining is required.…”

Section: Introductionmentioning

confidence: 99%

Pulses on Demand in Fibre and Hybrid Lasers

Petkovšek

Agrež

Petelin

et al. 2019

SV-JME

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This paper presents an investigation of pulse-on-demand operation in fibre and hybrid lasers. Two methods for efficient gain control that enable the generation of laser pulses at arbitrary times with controlled pulse parameters are presented. The method of direct modulation of the pump power in the high-power laser oscillator is shown to generate pulses with a duration in the nanosecond range, with repetition rates varying during operation from a single shot to over 1 MHz. An advanced method using a combination of marker and idler seeding a fibre amplifier chain is investigated. Such a system can easily achieve repetition rates of several tens of MHz. The lasers’ performances were successfully tested in a real environment on an industrial platform for laser transfer printing. Similar concepts were used for a laser source with ultrashort laser pulses (femtosecond range) on demand by using a mode-locked seed as a source and a solid-state amplifier to achieve high pulse energy and peak power.

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Optimization of a supercontinuum source based on tapered ordinary fibers

Abstract: The article relates to SPS Operation entitled Building blocks, tools and systems for future factories-GOSTOP.

Cited by 2 publications

References 34 publications

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Pulse-on-demand laser operation from nanosecond to femtosecond pulses and its application for high-speed processing

Pulses on Demand in Fibre and Hybrid Lasers

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