Ultra-fast laser micro processing by multiple laser spots

Bruening, Stephan; Du, Keming; Jarczynski, Manfred; Jenke, G.; Gillner, Arnold

doi:10.1016/j.procir.2018.08.084

Cited by 19 publications

(13 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All the above-mentioned achievements were accomplished with solar laser schemes based on single-laser/single-beam concept. However, the single-spot technology can demand days and even weeks for processing materials [ 27 ]. Research has produced a trend towards the deployment of multiple laser beams, each optimized to perform a facet of the overall process [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Four-Rod Pumping Approach for the Most Stable Solar Laser Emission

et al. 2022

View full text Add to dashboard Cite

We report a significant numerical improvement in multi-rod laser efficiency, with an enhanced solar tracking error compensation capacity for a heliostat-parabolic system. The solar laser head was composed of a fused silica conical lens and a single conical pump cavity ensuring multiple passes through four 4.55 mm diameter, 15 mm length Nd:YAG rods. 0.76° tracking error width at 10% laser power loss, and total multimode laser power variation of 0.05% at ±0.1° solar tracking error and 0.30% at ±0.2° solar tracking error were numerically calculated, being 1.27, 74.80 and 21.63 times, respectively, more than the experimental record in solar tracking error compensation capacity attained with a dual-rod side-pumping horizontal prototype pumped by the same heliostat-parabolic system. Additionally, the end-side-pumping configuration of the four-rod solar laser-enabled 43.7 W total multimode solar laser power, leading to 24.7 W/m2 collection efficiency and 2.6% solar-to-laser power conversion efficiency, being 1.75 and 1.44 times, respectively, more than that experimentally obtained from the dual-rod side-pumping prototype. The significant improvement in solar tracking error compensation capacity with a highly efficient end-side-pumping configuration is meaningful because it reduces the cost of high-precision trackers for solar laser applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Highly Efficient Four-Rod Pumping Approach for the Most Stable Solar Laser Emission

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Single-laser/single-beam concept. It is most commonly used in many laser applications, but can be out of any economic value with the current single spot technology due to the enormous processing time of days and even weeks (Bruening et al, 2018). 2.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous solar laser emissions from three Nd:YAG rods within a single pump cavity

et al. 2020

View full text Add to dashboard Cite

“…Most recently, the multibeam concept has also proven to be better in other research applications, such as laserdriven particle acceleration. 42 The two following multibeam concepts could be distinguished: 43 (1) multilaser/multibeam concept. It is based on macroscopic lateral arrangement of many lasers.…”

Section: Introductionmentioning

confidence: 99%

Seven-rod pumping concept for simultaneous emission of seven TEM00-mode solar laser beams

et al. 2020

View full text Add to dashboard Cite

In present-day single-rod/single-beam solar laser systems, the thermal lens effect is a serious issue that limits its ability for a scale-up to higher powers and improved beam quality. Aiming at resolving this shortcoming, the concept of a seven-rod/seven-beam solar pumping scheme is proposed. This scheme was composed of a first-stage heliostat-parabolic mirror system and a single large laser head. The large laser head consisted of seven fused silica compound parabolic concentrators, which transmitted and focused the concentrated solar radiation to each single-laser rod of small diameter, within a conical cavity, which enabled multiple passages of the pump rays. Consequently, each laser rod was pumped by only one-seventh of the total concentrated solar power, ensuring a significant reduction of the thermal induced effects in the laser rods. 13.3 W∕m 2 TEM 00 -mode solar laser collection efficiency was numerically achieved, representing an enhancement of 1.68 times over the experimental record from a single-rod prototype. 1.80 times improvement in solar-to-TEM 00 -mode laser power conversion efficiency was also registered in relation to the previous experimental record.

show abstract

Ultra-fast laser micro processing by multiple laser spots

Cited by 19 publications

References 5 publications

Highly Efficient Four-Rod Pumping Approach for the Most Stable Solar Laser Emission

Highly Efficient Four-Rod Pumping Approach for the Most Stable Solar Laser Emission

Simultaneous solar laser emissions from three Nd:YAG rods within a single pump cavity

Seven-rod pumping concept for simultaneous emission of seven TEM00-mode solar laser beams

Contact Info

Product

Resources

About