Gain-switched ytterbium-doped rod-type fiber laser

Petkovšek, Rok; Agrež, Vid; Sangla, Damien; Saby, Julien; Picard, Reynald Boula; Salin, F.

doi:10.1088/1612-2011/11/10/105808

Cited by 7 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another approach is a direct modulation of highpower diode lasers, which enables relatively simple setups, but has a downfall of low beam quality compared to single mode or few mode laser systems. However, the high modulation bandwidth of these high-power diode lasers can be exploited if they are used as pump for gain switched lasers [8][9][10][11][12]. With gain switching technique a good control over pulse-generation dynamics can be achieved and therefore enabling pulse-on-demand operation with nearly single-mode beam quality.…”

Section: Introductionmentioning

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…Subsequent work 7 sought to simplify the structure of the laser cavity by employing a specially designed semiconductor saturable absorber mirror (SESAM) as a passive modulator to directly realize the passively Q-switched induced gain-switched dual-waveband pulsed fiber laser. Compared with Q-switching, any intracavity modulator is unnecessary for gain-switching which is characterized usually by rectangular modulation function of pump 28 – 30 or pulsed pump 31 – 33 . Gain-switching makes the laser architecture simpler and avoids extra loss induced by active/passive modulators.…”

Section: Introductionmentioning

confidence: 99%

Power controllable gain switched fiber laser at ~ 3 μm and ~ 2.1 μm

Shi

Lai

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Based on a hybrid pumping method consisting of a 1150 nm continuous-wave pump source and a 1950 nm pulsed pump source, we demonstrate a power controllable gain-switched fiber laser in dual wavebands at ~ 3 μm and ~ 2.1 μm. Different pumping schemes for pumping a Ho3+-doped ZBLAN fiber are studied. Using only the 1950 nm pulsed pump source, ~ 2.1 μm gain-switched pulses with single and double pulses are obtained separately at different pump powers. This phenomenon indicates that the 1950 nm pulsed pump source acts as a modulator to trigger different states of the ~ 2.1 μm pulses. Moreover, by fixing the 1150 nm pump power at 3.259 W and adjusting the 1950 nm pump power, the output power of the ~ 2.1 μm gain-switched pulsed laser is flexibly controlled while the ~ 3 μm laser power is almost unchanged, inducing the maximum output powers of 167.96 mW and 260.27 mW at 2910.16 nm and 2061.65 nm, respectively. These results suggest that the comparatively low power of the ~ 2.1 μm gain-switched pulsed laser in dual-waveband laser can be efficiently overcome by reasonably controlling the 1950 nm pump power.

show abstract

“…The gain-switching technique uses modulation of the pump power (provided by the highpower diode lasers) to select only the first spike of the relaxation oscillations that form a single laser pulse [11]. With precise gain control pulses as short as 28 ns [12] were generated from a ytterbium-doped fibre laser and the achievable (but not limited to) peak power was over 4 kW [13]. Even shorter laser pulses [14] were generated by a more complicated core-pumping scheme in a thulium-doped fibre.…”

Section: Introductionmentioning

confidence: 99%

Pulses on Demand in Fibre and Hybrid Lasers

Petkovšek

Agrež

Petelin

et al. 2019

SV-JME

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Gain-switched ytterbium-doped rod-type fiber laser

Cited by 7 publications

References 20 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

Power controllable gain switched fiber laser at ~ 3 μm and ~ 2.1 μm

Pulses on Demand in Fibre and Hybrid Lasers

Contact Info

Product

Resources

About