Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Haroon Asghar"'
Autor:
Zain ul Abedin, Ajaz ul Haq, Rizwan Ahmed, Tahani A. Alrebdi, Ali M. Alshehri, Muhammad Irfan, Haroon Asghar
Publikováno v:
Nanomaterials, Vol 14, Iss 20, p 1682 (2024)
We report passively Q-switched pulse operation through an erbium-doped fiber laser (EDFL) utilizing graphene oxide/titania (GO/TiO2) nanorods as a saturable absorber. The GO/TiO2 nanorods were fabricated using a Sol–gel-assisted hydrothermal method
Externí odkaz:
https://doaj.org/article/ebb2516423e549e09bb7b1e3c895f147
Autor:
Umer Sayyab Khalid, Haroon Asghar, Hafsa Hameed, Muhammad Sohail, Adnan Khalil, Rizwan Ahmed, Zeshan A. Umar, Javed Iqbal, M. Aslam Baig
Publikováno v:
Heliyon, Vol 10, Iss 2, Pp e24478- (2024)
In this paper, the zirconia (ZrO2) nanoparticles-based saturable-absorber (SA) have been incorporated in an erbium-doped fiber laser (EDFL) cavity for achieving a Q-switched pulse operation. The implementation of the zirconia nanoparticles-based powd
Externí odkaz:
https://doaj.org/article/ae5ed6af591b42dc9291eadac32c358b
Publikováno v:
Results in Physics, Vol 52, Iss , Pp 106850- (2023)
Laser-induced breakdown spectroscopy (LIBS) technique was utilized to investigate the green mineral fluorite (CaF2) samples. The LIBS experiment was implemented by using Nd: YAG Laser system and a linear array CCD detector coupled with an Avantes spe
Externí odkaz:
https://doaj.org/article/87d230e0b9bb43e893ac43e57eacf315
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022)
Abstract In this paper, we present the performance and stability of an erbium-doped fiber laser (EDFL) based on ZnO saturable-absorber (SA) prepared using two schemes: solution method (SM) and pulsed laser deposition technique (PLDT). It was observed
Externí odkaz:
https://doaj.org/article/e74070fb7b614b0e82f184f960f29537
Autor:
Haroon Asghar, Umer Sayyab Khalid, Muhammad Sohail, Tahani A. Alrebdi, Zeshan A. Umar, A. M. Alshehri, Rizwan Ahmed, M. Aslam Baig
Publikováno v:
Micromachines, Vol 15, Iss 2, p 267 (2024)
This paper presents the investigations toward the direct use of bentonite clay (Al2H2O6Si) nanoparticles to act like a saturable absorber (SA) for the Q-switched pulse operation of an erbium-doped fiber laser (EDFL). The measured results reveal that
Externí odkaz:
https://doaj.org/article/a48e504f9cf64cde82a42db4d2c7b41f
Publikováno v:
Heliyon, Vol 9, Iss 3, Pp e13957- (2023)
In the present study, the immediate detection of rare-earth elements (REEs) in phosphorite deposits has been reported using laser-induced breakdown spectroscopy (LIBS). Numerous emission lines corresponding to the REEs such as lanthanum (La), cerium
Externí odkaz:
https://doaj.org/article/021281b6ce424168b8b429c0b213362d
Autor:
Amir Fayyaz, Javed Iqbal, Haroon Asghar, Tahani A. Alrebdi, Ali M. Alshehri, Waqas Ahmed, Nasar Ahmed
Publikováno v:
Metals, Vol 13, Iss 7, p 1188 (2023)
In this present work, we demonstrated a spectral characterization of copper–iron (Cu-Fe) alloy using optical emission spectroscopy. The Cu-Fe alloy plasma was generated on the target sample surface by directing the laser pulse of Q-switched Nd: YAG
Externí odkaz:
https://doaj.org/article/fe80f5ab274f4c7eb052d19e71108034
Autor:
Haroon Asghar, John G. McInerney
Publikováno v:
IEEE Photonics Journal, Vol 12, Iss 2, Pp 1-11 (2020)
In the present work, we report a path of RF stabilization versus delay subject to self-mode-locked (SML) two-section quantum-dash (QDash) lasers emitting at ~1.55 μm and operating at ~21 GHz repetition rate using a feedback ratio controlled and opti
Externí odkaz:
https://doaj.org/article/5abd9f1f14bf4bddb1299defcb2e69cd
Publikováno v:
Applied Sciences, Vol 13, Iss 5, p 2780 (2023)
In the present work, the rapid identification of elements and their relative chemical composition in various Peganum harmala seed samples were investigated using a calibration-free laser-induced breakdown spectroscopy technique (CF-LIBS). A pulsed Nd
Externí odkaz:
https://doaj.org/article/110f492a293c4cc1bd369c796488ae62
Publikováno v:
Molecules, Vol 27, Iss 15, p 5048 (2022)
We report a quantitative analysis of various plant-biochar samples (S1, S2 and S3) by utilizing a laser-induced breakdown spectroscopy (LIBS) technique. For LIBS analysis, laser-induced microplasma was generated on the target surface by using a focus
Externí odkaz:
https://doaj.org/article/2183abb7a4f144df9437c9dc2b39605b