Single‐mode selection using coherent imaging within a slab waveguide CO2laser

1992 ◽  
Vol 60 (20) ◽  
pp. 2469-2471 ◽  
Author(s):  
K. M. Abramski ◽  
H. J. Baker ◽  
A. D. Colley ◽  
D. R. Hall
Keyword(s):  
Mode Selection ◽  
Single Mode ◽  
Slab Waveguide ◽  
Coherent Imaging

Coupling of Upper Hybrid Surface Plasmon Modes in Magnetoplasma Waveguide Structure

2021 ◽  
Vol 14 (2) ◽  
pp. 155-160
Keyword(s):  
High Frequency ◽  
Cyclotron Frequency ◽  
Plasma Frequency ◽  
Single Mode ◽  
Homogeneous System ◽  
Slab Waveguide ◽  
Surface Modes ◽  
Plasma Slab ◽  
Warm Plasma ◽  
Hybrid Waves

Abstract: We investigate the spectra of high-frequency electrostatic surface electron plasmon oscillations propagating normal to a dc-magnetic field. These oscillations are supported by two identical magnetoplasma slabs separated by a vacuum slab. Propagation characteristics of surface magnetoplasma oscillations and their coupling are studied by simultaneously solving the homogeneous system of equations obtained by matching the electrostatic fields at the interfaces together with the warm plasma dielectric function of upper hybrid waves. We demonstrate the existence of two propagating magnetoplasma electrostatic surface modes (backward and forward modes). The backward mode emerges at frequency ω=ω_uh=√(ω_pe^2+ω_ce^2 ), where ω_pe and ω_ce are the electron plasma frequency and the electron cyclotron frequency, respectivily, and the forward propagating mode emerges at a lower frequency ω=ω_uh-ω_pe. The forward and backward surface modes become coupled and form a single mode at upper hybrid resonance quasi-static value ω=ω_uh/√2. Keywords: Upper hybrid modes, Plasma slab waveguide, Coupled plasmon surface modes.

Matching of a Bent Step-Index Single-Mode Fiber by a Modal Equivalent Slab Waveguide Structure

1994 ◽  
Vol 186 (1) ◽  
pp. 315-330 ◽  
Author(s):  
W. Haubenreisser ◽  
W. Ecke ◽  
S. Schröter ◽  
G. Schwotzer ◽  
R. Willsch
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Waveguide Structure ◽  
Slab Waveguide ◽  
Step Index

The Faraday threshold in small cylinders and the sidewall non-ideality

2013 ◽  
Vol 729 ◽  
pp. 496-523 ◽  
Author(s):  
W. Batson ◽  
F. Zoueshtiagh ◽  
R. Narayanan
Keyword(s):  
Contact Line ◽  
Mode Selection ◽  
Single Mode ◽  
Linear Stability Theory ◽  
Viscous Effects ◽  
Low Frequencies ◽  
Dimension 2 ◽  
First Time ◽  
Wetting Fluid ◽  
Selection Of

AbstractIn this work we investigate, by way of experiments and theory, the Faraday instability threshold in cylinders at low frequencies. This implies large wavelengths where effects from mode discretization cannot be ignored. Careful selection of the working fluids has resulted in an immiscible interface whose apparent contact line with the sidewall can glide over a tiny film of the more wetting fluid, without detachment of its actual contact line. This unique behaviour has allowed for a system whose primary dissipation is defined by the bulk viscous effects, and in doing so, for the first time, close connection is seen with the viscous linear stability theory for which a stress-free condition is assumed at the sidewalls. As predicted, mode selection and co-dimension 2 points are observed in the experiment for a frequency range including subharmonic, harmonic, and superharmonic modes. While agreement with the predictions are generally excellent, there are deviations from the theory for certain modes and these are explained in the context of harmonic meniscus waves. A review of previous work on single-mode excitation in cylinders is given, along with comparison to the viscous model and analysis based upon the conclusions of the current experiments.

Pure Single Mode Output of Six-Core Fiber Laser Based on Single-Mode Fiber Mode Selection

2011 ◽  
Vol 38 (8) ◽  
pp. 0802002
Author(s):  
张晓磊 Zhang Xiaolei ◽  
彭刚定 Peng Gangding ◽  
张行愚 Zhang Xingyu ◽  
王青圃 Wang Qingpu ◽  
常军 Chang Jun
Keyword(s):  
Fiber Laser ◽  
Mode Selection ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Mode ◽  
Core Fiber

scholarly journals Mode selection in square resonator microlasers for widely tunable single mode lasing

2015 ◽  
Vol 23 (21) ◽  
pp. 27739 ◽  
Author(s):  
Ming-Ying Tang ◽  
Shao-Shuai Sui ◽  
Yue-De Yang ◽  
Jin-Long Xiao ◽  
Yun Du ◽  
...  
Keyword(s):  
Mode Selection ◽  
Single Mode
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