scholarly journals In vitro fragmentation performance of a novel, pulsed Thulium solid-state laser compared to a Thulium fibre laser and standard Ho:YAG laser

2021 ◽  
Author(s):  
Lea Kraft ◽  
Ralf Petzold ◽  
Rodrigo Suarez-Ibarrola ◽  
Arkadiusz Miernik
Keyword(s):  
Solid State ◽  
Total Energy ◽  
Pulse Duration ◽  
Single Pulse ◽  
Solid State Laser ◽  
Fibre Laser ◽  
State Laser ◽  
Fragmentation Efficiency ◽  
Laser Devices

Abstract The aim of this work was to compare the fragmentation efficiency of a novel, pulsed Thulium solid-state laser (p-Tm:YAG) to that of a chopped Thulium fibre laser (TFL) and a pulsed Holmium solid-state laser (Ho:YAG). During the fragmentation process, we used a silicone mould to fixate the hemispherical stone models under water in a jar filled with room-temperature water. Each laser device registered the total energy applied to the stone model to determine fragmentation efficiency. Our study examined laser settings with single pulse energies ranging from 0.6 to 6 J and pulse frequencies ranging from 5 to 15 Hz. Similar laser settings were applied to explicitly compare the fragmentation efficiency of all three devices. We experimented with additional laser settings to see which of the three devices would perform best. The fragmentation performance of the three laser devices differed statistically significantly (p < 0.05). The average total energy required to fragment the stone model was 345.96 J for Ho:YAG, 372.43 J for p-Tm:YAG and 483.90 J for TFL. To fragment the stone models, both Ho:YAG and p-Tm:YAG needed similar total energy (p = 0.97). TFL’s fragmentation efficiency is significantly lower than that of Ho:YAG and p-Tm:YAG. Furthermore, we found the novel p-Tm:YAG’s fragmentation efficiency to closely resemble that of Ho:YAG. The fragmentation efficiency is thought to be influenced by the pulse duration. TFL’s shortest possible pulse duration was considerably longer than that of Ho:YAG and p-Tm:YAG, resulting in Ho:YAG and p-Tm:YAG exhibiting better fragmenting efficiency.

scholarly journals Experimental ex-vivo performance study comparing a novel, pulsed thulium solid-state laser, chopped thulium fibre laser, low and high-power holmium:YAG laser for endoscopic enucleation of the prostate

2021 ◽  
Author(s):  
Mehmet Yilmaz ◽  
Julia Esser ◽  
Lea Kraft ◽  
Ralf Petzold ◽  
August Sigle ◽  
...  
Keyword(s):  
Solid State ◽  
High Power ◽  
Ex Vivo ◽  
Solid State Laser ◽  
Fibre Laser ◽  
Average Score ◽  
Future Research ◽  
Ho:Yag Laser ◽  
State Laser ◽  
Laser Devices

Abstract Purpose The aim of this study was to compare the enucleation performances of four different types of laser devices in an ex-vivo experiment: a novel, pulsed Tm:YAG solid-state laser evaluation model (p-Tm:YAG), chopped thulium fibre laser (TFL), low-power Ho:YAG laser (LP-Ho:YAG), and a high-power Ho:YAG laser (HP-Ho:YAG). Methods Our primary aim was to endoscopically separate the fascial layers of a porcine belly using laser fibres within a time period of 60 s. The size of a “tissue pocket” was assessed numerically. The enucleation characteristics reflecting the surgeon’s experience were evaluated via the NASA Task Load Index (TLX) questionnaire and a questionnaire based on Likert scale. Results HP-Ho:YAG achieved with the available laser settings the largest overall “tissue pocket” (31.5 cm2) followed by p-Tm:YAG (15 cm2), TFL (12 cm2), and LP-Ho:YAG (6 cm2). The coagulation performances of p-Tm:YAG and TFL were rated the best. In the performance evaluation by the Likert questionnaire, HP-Ho:YAG (average score of 4.06) was rated highest, followed by p-Tm:YAG (3.94), TFL (3.38), and LP-Ho:YAG (3.25). The evaluation of the NASA-TLX performance questionnaire revealed average scores for HP-Ho:YAG, LP-Ho:YAG, TFL and p-Tm:YAG of 4.38, 4.09, 3.92 and 3.90, respectively. Conclusion We are the first to compare different laser devices and settings in an ex-vivo study. We found that the surgeons were most satisfied with the HP-Ho:YAG laser device, followed by the p-Tm:YAG. These findings could be highly relevant for future research and for the practical utilisation of laser systems in endourology.

Single-pulse solid-state laser with semiconductor pumping and kilohertz pulse-repetition rate of the lasing

2009 ◽  
Vol 76 (4) ◽  
pp. 208
Author(s):  
V. A. Berenberg ◽  
S. V. Doroganov ◽  
A. A. Mirzaeva ◽  
V. A. Rusov ◽  
G. E. Novikov ◽  
...  
Keyword(s):  
Solid State ◽  
Repetition Rate ◽  
Pulse Repetition Rate ◽  
Single Pulse ◽  
Solid State Laser ◽  
Pulse Repetition ◽  
State Laser

High-Peak Power Single-Cavity Dual-Comb Solid-State Laser with 100-fs Pulse Duration

2021 ◽  
Author(s):  
Justinas Pupeikis ◽  
Benjamin Willenberg ◽  
Carolin Bauer ◽  
Christopher R. Phillips ◽  
Ursula Keller
Keyword(s):  
Solid State ◽  
Pulse Duration ◽  
Peak Power ◽  
Solid State Laser ◽  
High Peak ◽  
High Peak Power ◽  
State Laser ◽  
Single Cavity

scholarly journals Solid-state laser devices based on an optically-confined oligothiophene-S,S-dioxide

2004 ◽  
Vol 1 (3) ◽  
pp. 458-461 ◽  
Author(s):  
Dario Pisignano ◽  
Luana Persano ◽  
Paolo Visconti ◽  
Giuseppe Gigli ◽  
Roberto Cingolani ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Laser ◽  
State Laser ◽  
Laser Devices

High-Peak Power Polarization-Multiplexed Yb:CaF2 Dual-Comb Solid-State Laser with 100-fs Pulse Duration

2021 ◽  
Author(s):  
Justinas Pupeikis ◽  
Benjamin Willenberg ◽  
Carolin Bauer ◽  
Christopher R. Phillips ◽  
Ursula Keller
Keyword(s):  
Solid State ◽  
Pulse Duration ◽  
Peak Power ◽  
Solid State Laser ◽  
High Peak ◽  
High Peak Power ◽  
State Laser

scholarly journals Development of a Solid-state Laser for Metal Marking Equipment

2017 ◽  
Vol 33 (2) ◽  
Author(s):  
Giang Manh Khoi ◽  
Do Xuan Tien ◽  
Trinh Dinh Chien
Keyword(s):  
Laser Radiation ◽  
Solid State ◽  
Technological Progress ◽  
Industrial Applications ◽  
Solid State Laser ◽  
Beam Profile ◽  
Laser Technology ◽  
State Laser ◽  
Laser Devices ◽  
Focused Beam

Abstract:  Laser radiation has many unique properties, such as highly focused, beam profile and selectable monochromatic wavelength, that suitable for many application in industry, biology technology as well as environmental processing. National Center for Laser Technology have developed the laser devices with application-oriented in the Industry is one of the key directions of us. With the active support of National Center for Technological Progress, we have successfully studied and mastered the technology to manufacture the laser equipments for industrial applications. In this report, we will introduce the technologies in the industrial laser equipments and the customers are trusting.

scholarly journals Extreme events and single-pulse spatial patterns observed in a self-pulsing all-solid-state laser

2018 ◽  
Vol 97 (3) ◽  
Author(s):  
Carlos Bonazzola ◽  
Alejandro Hnilo ◽  
Marcelo Kovalsky ◽  
Jorge Tredicce
Keyword(s):  
Solid State ◽  
Spatial Patterns ◽  
Extreme Events ◽  
Single Pulse ◽  
Solid State Laser ◽  
State Laser
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