Multi-kilowatt Single-mode Ytterbium-doped Large-core Fiber Laser

Jeong, Yoonchan; Boyland, A.J.; Sahu, J.K.; Chung, Seunghwan; Nilsson, Johan; Payne, D.N.

doi:10.3807/josk.2009.13.4.416

Cited by 124 publications

(60 citation statements)

References 21 publications

(36 reference statements)

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“…This astonishingly rapid progress has resulted in a wide range of configurations, spectral ranges, and temporal formats, and they are now leading candidates for many important applications requiring powers progressed from a few watts up to multi-kilowatts [3][4][5] and even more than a megawatt today [6]. The motivation for the intensive research and development in fiber laser technology has been driven by the permanently growing market whose trailblazer is the telecommunication industry [7].…”

Section: Introductionmentioning

confidence: 99%

“…The motivation for the intensive research and development in fiber laser technology has been driven by the permanently growing market whose trailblazer is the telecommunication industry [7]. Although high-power fiber lasers (HPFLs) were originally developed for telecom applications, researchers have also driven numerous different applications in medicine [8], remote sensing [5], material processing [9], etc., due to a number of intrinsic advantages, including simplicity of optical cavity construction, high efficiency, excellent beam quality, and microjoule-level energies at high repetition rates that boost processing speed [10].…”

Section: Introductionmentioning

confidence: 99%

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Theoretical analysis of doping management and its effects on power scaling

Gursel¹,

Elahi²,

Ilday³

et al. 2016

Turk J Elec Eng & Comp Sci

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Thermal load and nonlinear effects are two contrary phenomena that make up important drawbacks in rapid progress of high-power fiber lasers. To minimize the thermal load, which limits the average power, doping concentration should be decreased, which brings about increasing length of the fiber. In contrast, the presence of nonlinear effects and their management demand the use of high-doped, shorter fibers in order to maximize the peak power. Management on doping of gain fiber and obtaining a specific doping profile function along the short gain fiber is a proposed solution for prevention of the exchange between thermal load and nonlinear effects. The study shows two different approaches for keeping the temperature levels down in addition to obtaining power scaling profiles.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical analysis of doping management and its effects on power scaling

Gursel¹,

Elahi²,

Ilday³

et al. 2016

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

show abstract

“…Ytterbium doped fiber lasers (YDFLs) are commonly employed for high power defence applications. More specifically ytterbium doped fibers offer high output powers and tunable over a broad range of wavelengths, from around 975 nm -1100 nm (typically around 1060 nm) 4,5 . This provides a large window for combining several high power fiber lasers through spectral beam combining (SBC).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of 976 nm Multimode Single Emitter Laser Diodes for Efficient Pumping of 100 W+ Yb-doped Fiber Laser

et al. 2016

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Experimental evaluation of spectral and power-current (P-I) characteristics of fiber coupled single emitter multimode laser diodes used for development of efficient pumping assembly is reported. Fiber coupled laser diodes emitting around 976 nm are best suited for pumping Yb-doped fiber lasers because of excellent coupling efficiency and reduced thermal load. We have experimentally investigated emission spectrum of fiber coupled multimode laser diodes at different temperatures and drive currents. It is found that peak emission wavelength shifts towards the longer wavelength with increase in temperature and drive current. P-I characteristics of fiber coupled laser diodes have been obtained and presented for drive current from 0.4 A to 11.5 A. Based on experiment, we have constructed spectrally matched laser diode assembly for efficient pumping of 100 W fiber laser. It requires very precise control of temperature and drive current to maintain the emission spectrum. Total 162 W power is pumped in to the Ybdoped fiber laser cavity through multi-mode pump combiners and we have obtained 110 W fiber laser output power @1070 nm. The achieved optical-to-optical efficiency is 68 per cent.

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“…Regenerative amplifier systems have been demonstrated as preamplifiers for high power laser systems and operation in a wide wavelength region has been reported by applying different gain media including neodymium glass [1][2], Nd:YLF [3], Cr:LiSAF and Ti:sapphire [4][5]. The rareearth doped fiber lasers and amplifiers have developed fast due to their compact size, good stability and outstanding thermo-optical properties [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Regenerative Er-doped Fiber Amplifier System for High-repetition-rate Optical Pulses

Liu¹,

Wu²,

Li³

et al. 2013

Journal of the Optical Society of Korea

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A regenerative Er-doped fiber amplifier system for a high-repetition-rate optical pulse train is investigated for the first time. A signal pulse train with a wavelength tuning range of 18 nm is produced by a passive mode-locked fiber laser based on a nonlinear polarization rotation technique. In order to realize the amplification, an optical delay-line is used to achieve time match between the pulses' interval and the period of pulse running through the regenerative amplifier. The 16 dB gain is obtained for an input pulse train with a launching power of -30.4 dBm, a center wavelength of 1563.4 nm and a repetition rate of 15.3 MHz. The output properties of signal pulses with different center wavelengths are also discussed. The pulse amplification is found to be different from the regenerative amplification system for CW signals.

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Multi-kilowatt Single-mode Ytterbium-doped Large-core Fiber Laser

Cited by 124 publications

References 21 publications

Theoretical analysis of doping management and its effects on power scaling

Theoretical analysis of doping management and its effects on power scaling

Evaluation of 976 nm Multimode Single Emitter Laser Diodes for Efficient Pumping of 100 W+ Yb-doped Fiber Laser

Regenerative Er-doped Fiber Amplifier System for High-repetition-rate Optical Pulses

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