Repetition rate-tunable high power fiber femtosecond laser system

2012 ◽  
Author(s):  
Yunseok Kim ◽  
Seungman Kim ◽  
Seunghwoi Han ◽  
Sanguk Park ◽  
Jiyong Park ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
High Power ◽  
Repetition Rate ◽  
Laser System

scholarly journals Study on the high-power, high-repetition-rate and multi-wavelength femtosecond laser system

2010 ◽  
Vol 59 (6) ◽  
pp. 3979
Author(s):  
Liu Hua-Gang ◽  
Hu Ming-Lie ◽  
Liu Bo-Wen ◽  
Song You-Jian ◽  
Chai Lu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
High Power ◽  
Repetition Rate ◽  
Laser System ◽  
High Repetition Rate ◽  
High Repetition ◽  
Multi Wavelength

scholarly journals Femtosecond Laser Machining At Submicron And Nano Scale

2021 ◽  
Author(s):  
Alireza Dalili
Keyword(s):  
Femtosecond Laser ◽  
Pulse Energy ◽  
Repetition Rate ◽  
Pulse Width ◽  
Laser System ◽  
High Repetition Rate ◽  
Silicon Wafers ◽  
Good Precision ◽  
High Repetition ◽  
Nano Scale

The arrival of the femtosecond laser with a MHz repetition rate has provided the industry with a new tool to conduct submicron and nano scale machining. Several advantages such as high quality machining finish, good precision and high throughput can be obtained when using femtosecond laser to conduct nanomachining over lithography techniques currently in use. High repetition rate systems are preferred over low repetition rate femtosecond laser systems that have been studied by others due to their increased stability, speed, quality and discovery of new phenomena such as ripples and grains. This thesis proposes a high repetition rate fiber femtosecond laser system for meeting the above-mentioned conditions. The influence of the laser repetition rate and pulse energy on the size and quality of nano features fabricated on silicon wafers was investigated. Higher repetition rates led to smaller cutlines with uniform width. A 110 nm crater with a small heat affected zone of 0.79 µm was obtained at 13 MHz repetition rate and 2.042 J/cm² energy fluence. In terms of nanomachining below the ablation threshold (surface patterning), the influence of pulse width, repetition rate and pulse energy on the spacing of ripples, as well as diameter of grains created on silicon wafers, was examined. For the pulse width, repetition rate and pulse energy range used, the ripple spacing and grain diameter increased with laser pulse duration while other parameters did not play a significant role. These results show the capability of the proposed system in meeting the industry requirements.

scholarly journals High-energy hybrid femtosecond laser system demonstrating 2 × 10 PW capability

2020 ◽  
Vol 8 ◽  
Author(s):  
François Lureau ◽  
Guillaume Matras ◽  
Olivier Chalus ◽  
Christophe Derycke ◽  
Thomas Morbieu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Repetition Rate ◽  
Nuclear Physics ◽  
Laser System ◽  
Output Pulse ◽  
High Energy ◽  
Barium Borate ◽  
Femtosecond Pulses ◽  
Chirped Pulse ◽  
Pulse Amplifier

Abstract We report on a two-arm hybrid high-power laser system (HPLS) able to deliver 2 × 10 PW femtosecond pulses, developed at the Bucharest-Magurele Extreme Light Infrastructure Nuclear Physics (ELI-NP) Facility. A hybrid front-end (FE) based on a Ti:sapphire chirped pulse amplifier and a picosecond optical parametric chirped pulse amplifier based on beta barium borate (BBO) crystals, with a cross-polarized wave (XPW) filter in between, has been developed. It delivers 10 mJ laser pulses, at 10 Hz repetition rate, with more than 70 nm spectral bandwidth and high-intensity contrast, in the range of 1013:1. The high-energy Ti:sapphire amplifier stages of both arms were seeded from this common FE. The final high-energy amplifier, equipped with a 200 mm diameter Ti:sapphire crystal, has been pumped by six 100 J nanosecond frequency doubled Nd:glass lasers, at 1 pulse/min repetition rate. More than 300 J output pulse energy has been obtained by pumping with only 80% of the whole 600 J available pump energy. The compressor has a transmission efficiency of 74% and an output pulse duration of 22.7 fs was measured, thus demonstrating that the dual-arm HPLS has the capacity to generate 10 PW peak power femtosecond pulses. The reported results represent the cornerstone of the ELI-NP 2 × 10 PW femtosecond laser facility, devoted to fundamental and applied nuclear physics research.

Development of hybrid (solid/gas state) ultra-high power femtosecond laser system on the basis of XeF(C-A) amplifier

2011 ◽  
Vol 19 (2) ◽  
pp. 252-259 ◽  
Author(s):  
LOSEV V LOSEV V ◽  
ALEKSEEV S ALEKSEEV S ◽  
IVANOV N IVANOV N ◽  
KOVALCHUK B KOVALCHUK B ◽  
MIKHEEV L MIKHEEV L ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
High Power ◽  
Laser System ◽  
High Power Femtosecond Laser

Ultrafast Laser Machine Based on All-Fiber Femtosecond Laser System

2013 ◽  
Vol 652-654 ◽  
pp. 2374-2377 ◽  
Author(s):  
Dong Juan Li ◽  
Guang Hua Cheng ◽  
Zhi Yang ◽  
Yi Shan Wang
Keyword(s):  
Femtosecond Laser ◽  
Repetition Rate ◽  
Laser System ◽  
Average Power ◽  
Laser Source ◽  
Laser Machine ◽  
Fiber System ◽  
Sic Ceramics ◽  
Fiber Mode ◽  
Siemens 840D

A femtosecond laser machine consisting of femtosecond fiber laser, trepanning head, linear motor stages system and Siemens 840D system has been integrated for industry application. The femtosecond laser source is all fiber system which contains a fiber mode-lock laser at 1053 nm with a repetition rate of 3.9 MHz, a double-cladding gain fiber amplifiers and a PCF amplifier. An acoustical modulator has employed to tune repetition rate from 3.9 MHz to 100 KHz. An in-line fiber chirped grating is used to stretch the pulse duration to 700 ps. After the PCF amplifier pulse is compressed to sub-ps with 50% efficiency based two grating compressor. The system outputs an average power of 15 W at 100 KHz and 800 fs. Using four wedges trepanning head, cylinder hole is drilled in 1mm thickness SiC ceramics in 30 s.

Multiterawatt femtosecond laser system with kilohertz pulse repetition rate

2014 ◽  
Vol 44 (5) ◽  
pp. 452-457 ◽  
Author(s):  
V V Petrov ◽  
E V Pestryakov ◽  
A V Laptev ◽  
V A Petrov ◽  
G V Kuptsov ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Repetition Rate ◽  
Pulse Repetition Rate ◽  
Laser System ◽  
Pulse Repetition
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