Results 91 to 100 of about 62,046 (293)

Laser Linewidth Measurement Using an FPGA-Based Delay Self-Homodyne System

Photonics
Narrow-linewidth lasers play a crucial role in nonlinear optics, atomic physics, optical metrology, and high-speed coherent optical communications.
Fanqi Bu, Zhongan Zhao, Longfei Li, Cunwei Zhang, Tie Li, Yaoyao Qi, Jie Ding, Bingzheng Yan, Chen Zhao, Yulei Wang, Zhiwei Lu, Yu Ding, Zhenxu Bai   +12 more
doaj   +1 more source

ON THE LINEWIDTH OF LASERS

Acta Physica Sinica, 1964
In this paper, the "short-time" part of the linewidth of a laser beam has been considered with the fundamental equations which describe the behaviours of lasers. This linewidth is described usually by △vs=(8πhv(△v′)2)/P, (1) here △v′ is the half-width of the electromagnetic mode of cavity, v the beam frequency, and P the output power.
null FANG LI-ZHI, null LUO YI-ZU
openaire   +1 more source

Responsive Visible‐Wavelength Metasurfaces from Porous Silicon Based on Fano Guided‐Mode Resonance

Advanced Optical Materials, EarlyView.
The article introduces mesoporous silicon metasurfaces (pSi‐MS) supporting Fano guided‐mode resonances in the visible regime. By combining top‐down lithographic patterning of 2D gratings with bottom‐up electrochemical porosification, the approach realizes a new class of responsive metasurfaces, enabling highly sensitive and portable platforms for small
Tomoshree Dash, Saddam Gafsi, Estevao Marques Dos Santos, Ivan Kravchenko, Judson D. Ryckman   +4 more
wiley   +1 more source

Laser Linewidth Analysis and Filtering/Fitting Algorithms for Improved TDLAS-Based Optical Gas Sensor. [PDF]

Sensors (Basel), 2023
Tong C, Sima C, Chen M, Zhang X, Li T, Ai Y, Lu P.   +6 more
europepmc   +1 more source

Laser cooling of trapped ytterbium ions with an ultraviolet diode laser

, 2005
We demonstrate an ultraviolet diode laser system for cooling of trapped ytterbium ions. The laser power and linewidth are comparable to previous systems based on resonant frequency doubling, but the system is simpler, more robust, and less expensive.
Bell, D. Kielpinski, Diddams, F. X. Kärtner, Gill, Gill, Helmcke, Hildebrandt, Hornekaer, Hosaka, J. A. Cox, Kielpinski, M. Cetina, Pinnington, Raizen, Ricci, Stenger, Sugiyama, Tino, Wineland, Yu   +20 more
core   +1 more source

Temperature‐Dependent Optical and Polaritonic Properties of Excitons in hBN‐Encapsulated Monolayer TMDs

Advanced Optical Materials, EarlyView.
A comparative study of the optical and polaritonic properties of excitons in hBN‐encapsulated monolayer TMDs close to the homogeneous linewidth is presented. Reflection spectroscopy with transmission‐line modeling enables extraction of the complex permittivities and demonstrate their ability to host surface‐exciton‐polaritons.
Matan Meshulam, Anabel Atash Kahlon, Yonatan Gershuni, Thomas Poirier, James H. Edgar, Seth Ariel Tongay, Itai Epstein   +6 more
wiley   +1 more source

Versatile Control of Spectral Emissivity in Mid‐Infrared Metasurfaces via Silicon Microstructuring

Advanced Optical Materials, EarlyView.
A family of metasurfaces is obtained very simply, solely through the structuration of a single‐crystal silicon surface, without any other material involved. Based on the infrared plasmonic behavior of highly doped silicon, further control of surface topography by micro‐ and nano‐structuration is found to enable an avenue of options toward tailoring its
Kirollos Ernest Matta, Elyes Nefzaoui, Ahmed A. Elsayed, Armande Hervé, Martine Gnambodoe‐CapoChichi, Frédéric Marty, Mazen Erfan, Yasser M. Sabry, Abdelkrim Khelif, Tarik Bourouina   +9 more
wiley   +1 more source

Quasi‐Bound States in the Continuum on the Bloch‐Surface‐Wave Platform for Sensing With Simultaneous High Q‐Factor and High Sensitivity

Advanced Optical Materials, EarlyView.
Quasi‐bound states in the continuum on the Bloch surface wave platform are demonstrated, exhibiting high Q‐factors due to strongly suppressed radiative losses and high sensitivity arising from the large evanescent field inherent to the surface wave. The resonance shows clear shifts after each surface molecular functionalization step, highlighting its ...
Bo‐Wei Lin, Mu‐Hsin Chen, Yang‐Chun Lee, Tang Dang, Di Xing, Hiroaki Matsui, Jean‐Jacques Delaunay   +6 more
wiley   +1 more source

Frequency-tunable Optoelectronic Oscillator With Synchronized Dual-Wavelength Narrow-Linewidth Laser Output

IEEE Access, 2018
Synchronized dual-wavelength narrow-linewidth lasers and a wideband frequency-tunable optoelectronic oscillator are simultaneously realized using mutual-injection-locked distributed feedback (DFB) lasers.
Guangcan Chen, Dan Lu, Song Liang, Lu Guo, Wu Zhao, Yongguang Huang, Lingjuan Zhao   +6 more
doaj   +1 more source

Phase dynamics in a binary-collisions atom laser scheme

, 1997
Various aspects of the phase dynamics of an atom laser scheme based on binary collisions are investigated. Analytical estimates of the influence of elastic atom-atom collisions on the laser linewidth are given, and linewidths achievable in a recently ...
A. Guzman, C. C. Bradley, C. W. Gardiner, C. W. Gardiner, C. W. Gardiner, C. W. Gardiner, D. F. Walls, D. Jaksch, G. M. Moy, H. M. Wiseman, H. M. Wiseman, H. Wiseman, J. I. Cirac, J. J. Hope, J. Javanainen, J. Javanainen, K. B. Davis, K. Mølmer, K. Mølmer, M. G. Moore, M. G. Moore, M. H. Anderson, M. Holland, M. Naraschewski, M. Naraschewski, M. Olshanii, M. R. Andrews, M.-O. Mewes, O. Zobay, P. Meystre, P. Meystre, R. Dum, R. J. Ballagh, R. J. C. Spreeuw, T. Wong, U. Janicke, Y. Castin   +36 more
core   +1 more source