1-kW Output Laser

Sekiguchi, Hiroshi; Ito, Katsuhisa; Tanaka, Akiyoshi; Yamaura, Hitoshi; Kan, Hirofumi; Ueda, Ken–ichi

doi:10.2184/lsj.31.525

Cited by 10 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The benefits include ease of fabrication and assembly, good environmental stability and reliability, well controlled overlap between optical power and active media, high design flexibility, superior spatial mode quality, and the availability of efficient glass hosts as well as active ions [2][3][4][5]. The continuing symbiotic advancement of optical fibers (where a smaller doped core is surrounded by a larger mode-confining cladding) and highly efficient pump sources, such as high brightness, fiber coupled laser diodes [6] and high power Raman fiber lasers [7], continues to trigger both research and commercialization of high power fiber lasers [8][9][10][11][12]. Meanwhile, monolithic fiber-optic femtosecond fiber laser systems now offer pulse energy up to 100 microjoules (µJ) using the CPA scheme with large mode area (LMA) erbium-doped (Er-doped) fiber amplifiers with A eff up to 1060 µm 2 [13,14].…”

Section: Introductionmentioning

confidence: 99%

High efficiency, monolithic fiber chirped pulse amplification system for high energy femtosecond pulse generation

Peng¹,

Kim²,

Mielke³

et al. 2013

Opt. Express

View full text Add to dashboard Cite

A novel monolithic fiber-optic chirped pulse amplification (CPA) system for high energy, femtosecond pulse generation is proposed and experimentally demonstrated. By employing a high gain amplifier comprising merely 20 cm of high efficiency media (HEM) gain fiber, an optimal balance of output pulse energy, optical efficiency, and B-integral is achieved. The HEM amplifier is fabricated from erbium-doped phosphate glass fiber and yields gain of 1.443 dB/cm with slope efficiency >45%. We experimentally demonstrate near diffraction-limited beam quality and near transform-limited femtosecond pulse quality at 1.55 µm wavelength. With pulse energy >100 µJ and pulse duration of 636 fs (FWHM), the peak power is estimated to be ~160 MW. NAVAIR Public Release Distribution Statement A-"Approved for Public release; distribution is unlimited".

show abstract

Section: Introductionmentioning

confidence: 99%

High efficiency, monolithic fiber chirped pulse amplification system for high energy femtosecond pulse generation

Peng¹,

Kim²,

Mielke³

et al. 2013

Opt. Express

View full text Add to dashboard Cite

show abstract

“…Mainly the efficient optical pumping with diodes is meanwhile well established [1][2][3]. Other laser materials, like crystals doped with erbium or ytterbium [4], polycrystalline materials [5] and new geometries of active media like thin discs, slabs or fibres [6][7][8][9][10] are presenting impressive results; these techniques try to avoid thermally induced distortions. Another method is targeted on the compensation for these distortions are phase conjugating mirrors based on stimulated Brillouin scattering (SBS), which are used in oscillators or oscillator amplifier systems respectively [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Generation of tailored pulse trains for efficient material processing by a high power MOPA system with birefringence compensation

Riesbeck¹

2007

Laser Phys. Lett.

View full text Add to dashboard Cite

A flash lamp pumped, acousto-optical Q-switched Nd:YAG master oscillator power amplifier (MOPA) system with an average output power of almost 150 W and a beam quality of M 2 < 2.5 is developed. The system operates with a 100 Hz repetition rate for the flash lamps. In each pumping pulse a pulse train of 5 to 40 Q-switched laser pulses is generated. The pulse length is from 25 to 150 ns. A high beam quality of the amplified beam is realized by an elaborate amplifier design and a careful alignment of the beam diameter to the amplifier rods. Additionally, the thermally induced birefringence of the amplifiers is compensated by a 90• rotator and an optical image-relay system between two identical amplifier rods, so that a linear polarized laser beam could be achieved with depolarization losses below 2%.Drilling of a steel plate with tailored pulse trains delivered from the Nd:YAG MOPA system

show abstract

“…The greatest research/commercial effort in fiber laser technology has been in the area of CW lasers where powers in excess of 500 W have been demonstrated. [1][2][3] In the telecom world, chains of 30+ fiber amplifiers are used in series in undersea cable applications where they must operate continuously without failure for >20 years. Optical-to-optical conversion efficiencies of >60% are regularly obtained in fiber lasers and amplifiers when combined with efficient pump diodes and coupling can yield wall plug efficiencies of >10%.…”

Section: Introductionmentioning

confidence: 99%

Unique high-power fiber laser technologies

et al. 2005

View full text Add to dashboard Cite

Continuous wave (CW) fiber laser systems with output powers in excess of 500 W with good beam quality have now been demonstrated, as have high energy, short pulse, fiber laser systems with output energies in excess of 1 mJ. Fiber laser systems are attractive for many applications because they offer the promise of high efficiency, compact, robust systems. We have investigated fiber lasers for a number of applications requiring high average power and/or pulse energy with good beam quality at a variety of wavelengths. This has led to the development of a number of custom and unique fiber lasers. These include a short pulse, large bandwidth Yb fiber laser for use as a front end for petawatt class laser systems and a narrow bandwidth 0.938 m output Nd fiber laser in the > 10 W power range.

show abstract

1-kW Output Laser

Cited by 10 publications

References 6 publications

High efficiency, monolithic fiber chirped pulse amplification system for high energy femtosecond pulse generation

High efficiency, monolithic fiber chirped pulse amplification system for high energy femtosecond pulse generation

Generation of tailored pulse trains for efficient material processing by a high power MOPA system with birefringence compensation

Unique high-power fiber laser technologies

Contact Info

Product

Resources

About