Results 31 to 40 of about 1,181,091 (144)

Astrophotonic Spectrographs

Applied Sciences, 2019
Astrophotonics is the application of photonic technologies to channel, manipulate, and disperse light from one or more telescopes to achieve scientific objectives in astronomy in an efficient and cost-effective way.
Pradip Gatkine, Sylvain Veilleux, Mario Dagenais   +2 more
doaj   +1 more source

Single-mode VCSELs

SPIE Proceedings, 2002
We compare various approaches aiming at large-area high-power single-mode oxidized VCSELs. Stable and reproducible single-mode emission with SMSR (side-mode suppression ratio) greater than 30dB and output powers well above 5mW are reported for the long monolithic cavity and self-aligned shallow surface etching approaches, both of which are suitable for
Heiko J. Unold, Sawat W. Z. Mahmoud, Roland Jaeger, Matthias Golling, Max Kicherer, Felix Mederer, Michael C. Riedl, T. Knoedl, Michael Miller, Rainer Michalzik, Karl J. Ebeling   +10 more
openaire   +2 more sources

Single-mode wave decay

Physics of Plasmas
The usual approach on electrostatic wave decay process for a weak beam-plasma system considers two different wave modes interplaying, the Langmuir and ion-sound mode. In the present paper, a single-mode approach is shown to be feasible for conditions where the respective dispersion relations undergo topological changes.
Guilherme T. Irumé, Joel Pavan, Rudi Gaelzer   +2 more
openaire   +2 more sources

Fabrication and Performance Analysis of Single-Mode Polymer Waveguides and Devices

IEEE Photonics Journal
Low-cost lithography and wet development process are optimized for fabricating single-mode polymer waveguides and de-vices with small gap structures on FR4 substrate.
Han Wu, Ruizhi Jia, Fuling Wang, Liuge Du, Xiao Xu, Jia Zhao   +5 more
doaj   +1 more source

Statistical Model for Polarization Mode Dispersion in Single Mode Fibers

مجلة بغداد للعلوم, 2010
As the bit rate of fiber optic transmission systems is increased to more than , the system will suffer from an important random phenomena, which is called polarization mode dispersion. This phenomenon contributes effectively to: increasing pulse width,
Baghdad Science Journal
doaj   +1 more source

Steel Beam Compressive Strain Sensor Using Single-Mode-Multimode-Single-Mode Fiber Structure

IEEE Photonics Journal, 2016
A steel beam compressive strain sensor using single-mode-multimode-single-mode (SMS) fiber structure is demonstrated. Parallel measurements are made using an electrical resistance (ER) strain gauge along with the SMS to sense the compressive strain on ...
S. E. F. Masnan, A. Z. Zulkifli, N. M. Azmi, S. M. Akib, H. A. Razak, H. Arof, S. W. Harun   +6 more
doaj   +1 more source

Continuous-Wave Room-Temperature External Cavity Quantum Cascade Lasers Operating at λ~8.5 μm

Photonics
External cavity quantum cascade lasers (EC-QCLs) utilizing the Littrow configuration and operating at an approximate wavelength of 8.5 μm have been successfully demonstrated in continuous wave operations at room temperature.
Zixian Wang, Yuzhe Lin, Yuan Ma, Chenyang Wan, Fengxin Dong, Xuyan Zhou, Jinchuan Zhang, Fengqi Liu, Wanhua Zheng   +8 more
doaj   +1 more source

Thermodynamics of a single mesoscopic phononic mode

Physical Review Research, 2023
In recent decades, the laws of thermodynamics have been pushed down to smaller and smaller scales, within the theoretical field of stochastic thermodynamics and state-of-the-art experiments performed on microfabricated mesoscopic systems.
Ilya Golokolenov, Arpit Ranadive, Luca Planat, Martina Esposito, Nicolas Roch, Xin Zhou, Andrew Fefferman, Eddy Collin   +7 more
doaj   +1 more source

Single-mode fiber ultrasonic sensor [PDF]

IEEE Journal of Quantum Electronics, 1982
An acoustooptic ultrasonic sensor using a single-mode fiber is discussed. The sensor is based on acoustically induced modal birefringence which alters the polarization state of the optical beam.
R.P. De Paula, L. Flax, J.H. Cole, J.A. Bucaro   +3 more
openaire   +1 more source

The Effect of Multi-Oxide Layers on the Photoelectrical Performance of Double-Cavity Vertical-Cavity Surface-Emitting Lasers

Photonics
A double-cavity vertical-cavity surface-emitting laser (VCSEL) can effectively suppress high-order transverse modes and achieve a high side-mode suppression ratio (SMSR).
Zhu Shi, Xiaodong Chen, Yulian Cao, Zhigang Jia   +3 more
doaj   +1 more source