Farhadian, A H Mousavifard, S S Mollaei, M
Published in
Laser Physics
As a reliable method, Laser induced breakdown spectroscopy (LIBS) is widely applied to elemental analysis in different fields. In this research, LIBS was used to analyze pharmaceutical tablets. For this purpose, spectra from eight samples of three pharmaceutical classes were acquired; and after peaks recognition, they were investigated by principal...
Ud Din, Syed Zaheer Yang, Zixin Li, Shanming Hang, Yin Yang, Qi Li, Chun Ren, Xianghe Zu, Yuqian
Published in
Laser Physics
An iron-cobalt co-doped ZnSe polycrystalline (Co,Fe:ZnSe) was prepared by the thermal diffusion method, and its nonlinear optical response was characterized for the first time. Using the as-prepared Co,Fe:ZnSe as a saturable absorber (SA), the blue laser diode pumped Q-switched Pr:YLF laser at 607 nm (orange), and 639 nm (red) was successfully real...
Jiang, Qiuhao Li, Peng Tong, Zhengrong Zhang, Weihua Wang, Xue Yan, Gangxiao
Published in
Laser Physics
A multi-wavelength erbium-doped fiber laser using tungsten disulfide (WS2) as a nonlinear saturable absorber is proposed. The laser structure consists of a Lyot filter and a WS2 film in a ring cavity. The WS2 film attached to the end of the fiber jumper can suppress the mode competition phenomenon caused by erbium-doped fiber due to its good nonlin...
Dwivedi, Vishal Chauhan, Prerna Maurya, Gulab Singh Roldán, Alicia Marín Veis, Pavel Pathak, Ashok Kumar
Published in
Laser Physics
The growth of the pharmaceutical industry to keep pace with the well-being of humans worldwide has posed many challenges related to quality control. This paper reports on the potential application of a modern optical spectroscopic technique popularly known as laser-induced breakdown spectroscopy (LIBS) to address some quality aspects such as the sa...
Tabatabaei Jafari, N Batebi, S Sarikhani, S Eyni Chenar, R
Published in
Laser Physics
A 1030 nm ytterbium doped fiber laser (YDFL), made by using a 20/400 μm YDF, was studied both theoretically and experimentally in this article. From the theoretical point of view, it is found that the optimum length for the active fiber with higher than 30 dB suppression of amplified spontaneous emission (ASE) effect is about 7.3 m. However, an out...
Koley, Chhanda Nirala, Anil Kumar
Published in
Laser Physics
Biospeckle activity in leaves arise due to the contribution of several phenomena like water content, respiration, transpiration etc. Our present research work deals with the biospeckle activity of a plant leaf using the laser biospeckle technique and wavelet transform just after removal from the plant, to isolate physiological activities like respi...
Radiul, Seikh Mustafa Chowdhury, Jugal Goswami, Angana Hazarika, Simanta
Published in
Laser Physics
The aggregation behaviour of rhodamine B (RhB) dye has been studied with the change in the concentration of the RhB in water, ethanol and propanol using absorption and laser induced fluorescence spectroscopy. The dimer and monomer fluorescence emissions were observed simultaneously in all the solvents. The monomer to dimer fluorescence intensity ra...
Babaiy Tooski, Majid Maleki, Abbas Eslami Majd, Abdolah Ebadian, Hassan
Published in
Laser Physics
Continuous-wave and pulsed operation of a Ho:YLF laser was demonstrated. A Tm:fiber laser with 70 W output power was used for the pump source. In this experimental setup, the end-pumped gain medium with 0.5% and 1% Ho concentration in the optical resonators were used. In the continuous-wave regime, 14.2 and 12.8 W linearly polarized power with a co...
Zhao, Lijuan Liang, Ruoyu Xu, Zhiniu
Published in
Laser Physics
In order to reduce the loss in orbital angular momentum (OAM) long-distance communication systems, an OAM erbium-ytterbium co-doped fiber amplifier (OAM-EYDFA) based on photonic crystal fiber (PCF) is proposed and investigated for the first time in this work. We set up a three-dimensional electromagnetic field model of the PCF in Comsol and solved ...
Contreras-Bulnes, R Rodríguez-Vilchis, L E Teutle-Coyotecatl, B Velazquez-Enriquez, U Zamudio-Ortega, C M
Published in
Laser Physics
Erbium-doped yttrium aluminium garnet (Er:YAG) lasers and fluoride have been used as preventive treatments to combat permanent tooth decay; however, little is known about deciduous teeth, which are more prone to caries. The purpose of this study was to assess acid resistance, roughness, and microhardness induced by an Er:YAG laser, fluoride applica...
