Fiber lasers based on beam quality converters for diode lasers

2013 ◽  
Author(s):  
Charley Bachert ◽  
Georg Rehmann ◽  
Axel Luft ◽  
Anne Krause ◽  
Merlin Gerber ◽  
...  
Keyword(s):  
Fiber Lasers ◽  
Beam Quality ◽  
Diode Lasers

Experimental Investigation of Limits to Slow Axis Beam Quality in High Power Broad Area Diode Lasers

2014 ◽  
Author(s):  
M. Winterfeldt ◽  
P. Crump ◽  
H. Wenzel ◽  
G. Erbert ◽  
G. Trankle
Keyword(s):  
Experimental Investigation ◽  
High Power ◽  
Beam Quality ◽  
Diode Lasers ◽  
Broad Area ◽  
Slow Axis

Four-wave mixing effect on high-power continuous-wave all-fiber lasers

2018 ◽  
Vol 32 (23) ◽  
pp. 1850275
Author(s):  
Jinkun Zheng ◽  
Wei Zhao ◽  
Baoyin Zhao ◽  
Zhe Li ◽  
Gang Li ◽  
...  
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
Continuous Wave ◽  
Beam Quality ◽  
Matching Condition ◽  
Four Wave Mixing ◽  
Theoretical Description ◽  
Phase Matching ◽  
Wave Mixing ◽  
Mixing Effect

A four-wave mixing effect on high-power continuous-wave fiber lasers has been demonstrated theoretically and experimentally. Detailed theoretical description of phase matching is presented and we found that the phase matching condition is satisfied at the frequency shift of 5.16 THz. While the intensity in fiber core region is more than about 394 MW/cm2, the four-wave mixing products of 1100 nm and 1060 nm were also observed in high-power all-fiber laser. The comparison shows that the experiment result is in good agreement with the simulation result. In addition, the beam quality deterioration for the laser is caused by the four-wave mixing effect and the mode instability. The [Formula: see text] factor measured at maximal intensity of 478 MW/cm2 is 2.80.

scholarly journals Mitigation of stimulated Raman scattering in kilowatt-level diode-pumped fiber amplifiers with chirped and tilted fiber Bragg gratings

2019 ◽  
Vol 7 ◽  
Author(s):  
Meng Wang ◽  
Le Liu ◽  
Zefeng Wang ◽  
Xiaoming Xi ◽  
Xiaojun Xu
Keyword(s):  
Raman Scattering ◽  
Fiber Lasers ◽  
Stimulated Raman Scattering ◽  
Beam Quality ◽  
Average Power ◽  
Fiber Amplifiers ◽  
Maximum Output ◽  
Power Scaling ◽  
Diode Pumped ◽  
Stimulated Raman

The average power of diode-pumped fiber lasers has been developed deeply into the kW regime in the past years. However, stimulated Raman scattering (SRS) is still a major factor limiting the further power scaling. Here, we have demonstrated the mitigation of SRS in kilowatt-level diode-pumped fiber amplifiers using a chirped and tilted fiber Bragg grating (CTFBG) for the first time. The CTFBG is designed and inscribed in large-mode-area (LMA) fibers, matching with the operating wavelength of the fiber amplifier. With the CTFBG inserted between the seed laser and the amplifier stage, an SRS suppression ratio of ${\sim}10~\text{dB}$ is achieved in spectrum at the maximum output laser power of 2.35 kW, and there is no reduction in laser slope efficiency and degradation in beam quality. This work proves the feasibility and practicability of CTFBGs for SRS suppression in high-power fiber lasers, which is very useful for the further power scaling.

Experimental investigation of factors limiting slow axis beam quality in 9xx nm high power broad area diode lasers

2014 ◽  
Vol 116 (6) ◽  
pp. 063103 ◽  
Author(s):  
M. Winterfeldt ◽  
P. Crump ◽  
H. Wenzel ◽  
G. Erbert ◽  
G. Tränkle
Keyword(s):  
Experimental Investigation ◽  
High Power ◽  
Beam Quality ◽  
Diode Lasers ◽  
Broad Area ◽  
Slow Axis

scholarly journals 808 nm tapered diode lasers optimised for high output power and nearly diffraction-limited beam quality in pulse mode operation

2007 ◽  
Author(s):  
Ole B. Jensen ◽  
Andreas Klehr ◽  
Frank Dittmar ◽  
Bernd Sumpf ◽  
Götz Erbert ◽  
...  
Keyword(s):  
Output Power ◽  
Beam Quality ◽  
Diode Lasers ◽  
Pulse Mode ◽  
High Output Power ◽  
Mode Operation ◽  
High Output

Beam quality of multimode fiber lasers using coiling technique

Optik ◽  
2013 ◽  
Vol 124 (1) ◽  
pp. 82-84 ◽  
Author(s):  
Zhen Li ◽  
Jun Zhou ◽  
Bing He ◽  
Qihong Lou ◽  
Dong Xue
Keyword(s):  
Fiber Lasers ◽  
Beam Quality ◽  
Multimode Fiber

(AlGaIn)(AsSb) quantum well diode lasers with improved beam quality

2005 ◽  
Author(s):  
Joachim Wagner ◽  
Eva Geerlings ◽  
Gudrun Kaufel ◽  
Marc T. Keleman ◽  
Christian Manz ◽  
...  
Keyword(s):  
Quantum Well ◽  
Beam Quality ◽  
Diode Lasers

Astigmatism and beam quality of high-brightness tapered diode lasers

2004 ◽  
Author(s):  
Marc T. Kelemen ◽  
Juergen Weber ◽  
Senta Kallenbach ◽  
Christian Pfahler ◽  
Michael Mikulla ◽  
...  
Keyword(s):  
Beam Quality ◽  
Diode Lasers ◽  
High Brightness
Sign in / Sign up

Export Citation Format

Share Document