Average power limit of fiber-laser systems with nearly diffraction-limited beam quality

2016 ◽  
Author(s):  
Hans-Jürgen Otto ◽  
Cesar Jauregui ◽  
Jens Limpert ◽  
Andreas Tünnermann
Keyword(s):  
Fiber Laser ◽  
Beam Quality ◽  
Average Power ◽  
Laser Systems ◽  
Power Limit

522 W average power, spectrally beam-combined fiber laser with near-diffraction-limited beam quality

2007 ◽  
Vol 32 (4) ◽  
pp. 349 ◽  
Author(s):  
Thomas H. Loftus ◽  
Anping Liu ◽  
Paul R. Hoffman ◽  
Alison M. Thomas ◽  
Marc Norsen ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Beam Quality ◽  
Average Power

scholarly journals Monolithic high-average-power linearly polarized nanosecond pulsed fiber laser with near-diffraction-limited beam quality

2018 ◽  
Vol 6 ◽  
Author(s):  
Long Huang ◽  
Pengfei Ma ◽  
Daren Meng ◽  
Lei Li ◽  
Rumao Tao ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Output Power ◽  
Linear Polarization ◽  
Beam Quality ◽  
Average Power ◽  
Narrow Linewidth ◽  
High Average Power ◽  
Maximal Output Power ◽  
Maximal Output ◽  
Pulsed Fiber Laser

An all-fiberized high-average-power narrow linewidth ns pulsed laser with linear polarization is demonstrated. The laser system utilizes a typical master oscillator power amplifier (MOPA) configuration. The stimulated Brillouin scattering (SBS) is effectively suppressed due to the short fiber length and large mode area in the main amplifier, combined with the narrow pulse duration smaller than the phonon lifetime of SBS effect. A maximal output power of 466 W is obtained with a narrow linewidth of ${\sim}$203.6 MHz, and the corresponding slope efficiency is ${\sim}$80.3%. The pulse duration is condensed to be ${\sim}$4 ns after the amplification, corresponding to the peak power of 8.8 kW and the pulse energy of $46.6~\unicode[STIX]{x03BC}\text{J}$. Near-diffraction-limited beam quality with an $M^{2}$ factor of 1.32 is obtained at the output power of 442 W and the mode instability (MI) is observed at the maximal output power. To the best of our knowledge, this is the highest average output power of the all-fiberized narrow linewidth ns pulsed fiber laser with linear polarization and high beam quality, which is a promising source for the nonlinear frequency conversion, laser lidar, and so on.

High-power ultrafast fiber lasers for materials processing

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tino Eidam ◽  
Sven Breitkopf ◽  
Oliver Herrfurth ◽  
Fabian Stutzki ◽  
Marco Kienel ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Beam Quality ◽  
Fiber Amplifiers ◽  
Materials Processing ◽  
Chirped Pulse ◽  
Arbitrary Power ◽  
Laser Systems ◽  
Chirped Pulse Amplification ◽  
Mode Area ◽  
Pulse Energies

Abstract State-of-the-art fiber-laser systems can deliver femtosecond pulses at average powers beyond the kilowatt level and multi-mJ pulse energies by employing advanced large-mode-area fiber designs, chirped-pulse amplification, and the coherent combination of parallel fiber amplifiers. By using sophisticated coherent phase control, one or even several output ports can be modulated at virtually arbitrary power levels and switching speeds. In addition, an all-fiber setup for GHz-burst generation is described allowing to access an even wider range of laser parameters. The combination of all these approaches together with the robustness, efficiency, and excellent beam quality inherent to fiber-laser technology has the potential to strongly improve existing materials-processing applications.

High Harmonic Generation of Fiber Laser Systems with more than 100 μW Average Power per Harmonic

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
Steffen Hädrich ◽  
Jan Rothhardt ◽  
Arno Klenke ◽  
Manuel Krebs ◽  
Armin Hoffmann ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Harmonic Generation ◽  
Average Power ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Laser Systems

scholarly journals Diode-pumped high-average power femtosecond fiber laser systems

1996 ◽  
Author(s):  
M. E. Fermann ◽  
A. Galvanauskas ◽  
D. Harter ◽  
J. D. Minelly ◽  
J. E. Caplen ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Average Power ◽  
High Average Power ◽  
Laser Systems ◽  
Diode Pumped ◽  
Femtosecond Fiber Laser

scholarly journals An Eye-Safe, SBS-Free Coherent Fiber Laser LIDAR Transmitter with Millijoule Energy and High Average Power

Photonics ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 15
Author(s):  
Mehmetcan Akbulut ◽  
Leonid Kotov ◽  
Kort Wiersma ◽  
Jie Zong ◽  
Maohe Li ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Repetition Rate ◽  
Peak Power ◽  
Figure Of Merit ◽  
Current System ◽  
Glass Fibers ◽  
Average Power ◽  
High Gain ◽  
Short Length ◽  
High Average Power

We report on an eye-safe, transform-limited, millijoule energy, and high average power fiber laser. The high gain and short length of the NP phosphate-glass fibers enable the SBS-free operation with kW level peak power. The output energy is up to 1.3 mJ, and the average power is up to 23 W at an 18 kHz repetition rate with 600 ns pulses (peak power > 2.1 kW). The PER is ≈16 dB and the M2 of the beam is 1.33 × 1.18. The coherent LIDAR Figure Of Merit (FOM) is 174 mJ*sqrt(Hz), which to our knowledge is the highest reported for a fiber laser. We also report 0.75 mJ energy and >3.7 kW peak power with down to 200 ns pulses and up to 1.21 mJ energy with a 3–5 kHz repetition rate operation of the current system.

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