Results 41 to 50 of about 258,805 (302)

Re-mineralization capability of two natural nano-plant extracts on early enamel caries using diode laser

Indian Journal of Dental Sciences, 2022
Background: To investigate diode laser application and two natural nano-plant extracts effect on the re-mineralization and surface micro-hardness of early enamel carious lesions.
Lamiaa Mahmoud Moharam, Doaa Mohamed Sadony   +1 more
doaj   +1 more source

Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter, Felix Drechsler, Till M. J. Stadtmüller, Cameliu Himcinschi, Christos G. Aneziris, Jens Kortus   +5 more
wiley   +1 more source

A Comparative Evaluation of the Effect of Photobiomodulation on the Depth of Anaesthesia During Endodontic Treatment of Teeth with Symptomatic Irreversible Pulpitis—A Prospective Clinical Trial

Journal of Pharmacy and Bioallied Sciences
Background: Effective pulpal anesthesia is crucial in endodontic practice, particularly in treating symptomatic irreversible pulpitis. This study explores photobiomodulation therapy (PBMT) as a non-invasive adjunct to traditional anesthesia.
Akshita Balivada, R Vinay Chandra, D Krithika, B Arvind, Mrinalini Jaichander, Priyanka Girish   +5 more
doaj   +1 more source

Histological evaluation of the surgical margins of oral soft tissue incisions using a dual-wavelength diode laser and an Er, Cr:YSGG laser; an ex vivo study [PDF]

Journal of Applied Oral Science
Oral soft tissue lesions require a precise diagnosis by oral biopsy with the ability to recognize these lesions within histopathological levels, so the instrument used for the incisions should be safe and cause little to no harm to the surrounding tissue.
Alaa Jamal Al-ANI, Hanan J TAHER, Ammar Saleh ALALAWI   +2 more
doaj   +1 more source

Demonstration of an All‐Optical AND Gate Mediated by Photochromic Molecules

Advanced Functional Materials, EarlyView.
A logic AND gate that runs on photons is demonstrated. It relies on two spatially separated photochromic molecules that work in tandem. Abstract The realization of a photonic logic AND gate, i.e. a logic AND gate that runs on photons rather than electrons, and where all steps are controlled by light, is demonstrated. In a proof‐of‐principle experiment,
Heyou Zhang, Max Gießübel, Pankaj Dharpure, Andrea Albert, Vira Niestierkina, Paul Mulvaney, Mukundan Thelakkat, Jürgen Köhler   +7 more
wiley   +1 more source

Active laser frequency stabilization using neutral praseodymium (Pr)

, 2009
We present a new possibility for the active frequency stabilization of a laser using transitions in neutral praseodymium. Because of its five outer electrons, this element shows a high density of energy levels leading to an extremely line-rich excitation
A. Friedenauer, A. Friedenauer, A. Ginibre, A. Krzykowski, A.L. Schawlow, A.Yu. Nevsky, B. Furmann, C. Schwedes, C.E. Wieman, F.-L. Hong, G. H. Guthöhrlein, H. Schmitz, J. von Zanthier, J.P. Home, J.T. Höffges, K.D. Böklen, L. Ricci, M.N. Skvortsov, R. Zalubas, R.M. Macfarlane, S. Oppel, S. Picard, T. Kuwamoto, T. Schätz, V. Batteiger, W. Kaenders, W.C. Martin, W.J. Childs   +27 more
core   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

Linewidth Reduction by Feedforward Locking a Laser Diode to a Femtosecond Comb Line

IEEE Photonics Journal, 2016
We propose and demonstrate a novel method to narrow the linewidth of a laser diode at 1550 nm by an electronics-assisted feedforward path and weak locking to a femtosecond comb line simultaneously.
Ziping Zhang, Yitang Dai, Pan Ou, Feifei Yin, Yue Zhou, Jianqiang Li, Kun Xu   +6 more
doaj   +1 more source

Effect of Temperature Tuning on Diode Laser Performance [PDF]

Engineering and Technology Journal, 2009
In this work, an expermental study on wavelength tunning for diode laser adopting temperature behavior varition process is carried out .Temperature effect on the characteristics of a stripe Double Heterostructure CW (GaAlAs) diode laser is shown .
Zainab T. Hussain, Adawiya J. Haider
doaj   +1 more source

Rubidium resonant squeezed light from a diode-pumped optical-parametric oscillator

, 2008
We demonstrate a diode-laser-pumped system for generation of quadrature squeezing and polarization squeezing. Due to their excess phase noise, diode lasers are challenging to use in phase-sensitive quantum optics experiments such as quadrature squeezing.
Caballero, J. M., Mitchell, M. W., Predojević, A., Zhai, Z.   +3 more
core   +1 more source