scholarly journals Selection of lasing direction in single mode semiconductor square ring cavities

2016 ◽  
Vol 119 (5) ◽  
pp. 053101 ◽  
Author(s):  
Jin-Woong Lee ◽  
Kyoung-Youm Kim ◽  
Hee-Jong Moon ◽  
Kyung-Sook Hyun
Keyword(s):  
Single Mode ◽  
Selection Of

scholarly journals INVESTIGATING THE EFFECT OF TAPER LENGTH ON SENSITIVITY OF THE TAPERED-FIBER BASED TEMPERATURE SENSOR

2016 ◽  
Vol 78 (3) ◽  
Author(s):  
Baktiar Musa ◽  
Yasmin Mustapha Kamil ◽  
Muhammad Hafiz Abu Bakar ◽  
Ahmad Shukri Mohd Noor ◽  
Alyani Ismail ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Optimum Parameter ◽  
Low Cost ◽  
High Sensitivity ◽  
Single Mode ◽  
Careful Selection ◽  
Tapered Fiber ◽  
Tapered Optical Fiber ◽  
Good Repeatability ◽  
Selection Of

A temperature sensor using single-mode tapered fiber is presented. To better understand the behaviour of a tapered optical fiber, transmission experiments with different taper profiles, specifically waist length were performed. The effects of taper profiles on the sensitivity of the sensor were also investigated. It is demonstrated that careful selection of the taper profile can increase the sensitivity of the sensor. In our experiment, a good temperature sensing result was achieved using the optimum parameter. The best sensitivity achieved was 45.5 pm/°C that measured the range of temperature from 30°C to 120°C. The fabricated sensors are easy to fabricate and relatively low cost. Our results indicate that the tapered fiber based temperature sensor has high sensitivity and good repeatability.  

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.

Selection of single-mode radiation from a short-pulse free-electron laser

1993 ◽  
Vol 70 (21) ◽  
pp. 3255-3258 ◽  
Author(s):  
D. Oepts ◽  
A. F. G. van der Meer ◽  
R. J. Bakker ◽  
P. W. van Amersfoort
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Short Pulse ◽  
Single Mode ◽  
Selection Of

scholarly journals Повышение мощности и улучшение направленности излучения широкоапертурных гетеролазеров при оптимизации размеров брэгговской решетки

2021 ◽  
Vol 55 (8) ◽  
pp. 659
Author(s):  
Н.С. Гинзбург ◽  
А.С. Сергеев ◽  
Е.Р. Кочаровская ◽  
А.М. Малкин ◽  
В.Ю. Заславский
Keyword(s):  
Physical Interpretation ◽  
Radiation Power ◽  
Single Mode ◽  
Output Radiation ◽  
Oscillation Regime ◽  
Bragg Structure ◽  
Bragg Structures ◽  
Mode Oscillation ◽  
Selection Of ◽  
Output Radiation Power

We investigate the dynamics of heterolasers with finite-length planar Bragg structures. Based on the analysis of the dispersion equation describing the eigenwaves propagation in a Bragg structure, we present a physical interpretation of selection of modes with frequencies higher than the stopband. We demonstrate the improvement of stability by using the Bragg structures with transverse dimensions lower than the width of the active area of DFB heterolasers. As a result, the single-mode oscillation regime is sustained over a wider range of pump levels, and, correspondingly, of the output radiation power.

scholarly journals Locking and wavelength selection of an ultra-collimated single-mode diode laser bar by a volume holographic grating

2013 ◽  
Vol 21 (4) ◽  
pp. 4512 ◽  
Author(s):  
Natalia Trela ◽  
Howard J. Baker ◽  
Denis R. Hall
Keyword(s):  
Diode Laser ◽  
Single Mode ◽  
Holographic Grating ◽  
Wavelength Selection ◽  
Selection Of

scholarly journals Pengujian sensor fotodetektor sebagai alat ukur kadar gula pada larutan gula

2020 ◽  
Vol 4 (1) ◽  
pp. 39-45
Author(s):  
Alex Taufiqurrohman Zain
Keyword(s):  
Optical Fiber ◽  
Light Source ◽  
Personal Computer ◽  
Sugar Content ◽  
High Sensitivity ◽  
Single Mode ◽  
Rapid Response ◽  
Single Mode Optical Fiber ◽  
Measurement Results ◽  
Selection Of

Photodiode is a type of photodetector. P-I-N (PIN) link photodiode was chosen in this study. This selection is based on high sensitivity and rapid response to any changes in light. BPW 34 type photodiode is used as a photodetector and RGB bright LED as its light source. The selection of RGB bright LEDs is based on its ability to automatically change the beam spectrum based on bit changes. As a medium for propagating light, a single mode optical fiber is used. In addition to designing hardware, this research also designs applications through Arduino IDE 1.0.4 and LabVIEW 2013 so that hardware can be controlled and displayed on a PC. As a microcontroller, the Arduino UNO module was used in this study. The results of this study indicate that the rays on the RGB bright LED can be controlled through the bit system on a PC (Personal Computer), and can bring up the measurement results of sugar content through a PC.

Selection of the parameters of a single-mode waveguide to ensure minimal dispersion in the region of 1.55μ

1980 ◽  
Vol 10 (12) ◽  
pp. 1558-1559
Author(s):  
A S Belanov ◽  
M M Bubnov ◽  
A B Grudinin ◽  
Evgenii M Dianov
Keyword(s):  
Single Mode ◽  
Single Mode Waveguide ◽  
Selection Of

scholarly journals Recent Advances in Supercontinuum Generation in Specialty Fiber

2021 ◽  
Author(s):  
Thibaut Sylvestre
Keyword(s):  
Optical Fibers ◽  
Single Mode ◽  
Molecular Fingerprint ◽  
High Brightness ◽  
Normal Dispersion ◽  
Recent Advances ◽  
Silica Fibers ◽  
Significant Research ◽  
Selection Of ◽  
Uv Range

The physics and applications of fiber-based supercontinuum (SC) sources have been a subject of intense interest over the last decade, with a significant impact on both basic science and industry. New uses for SC sources are also constantly emerging due to their unique properties that combine high brightness, multi-octave frequency bandwidth, fiber delivery, and single-mode output. The last few years have seen significant research efforts focused on extending the wavelength coverage of SC sources towards the 2 to 20 μm molecular fingerprint mid-infrared (MIR) region and in the ultraviolet (UV) down to 100 nm, while also improving stability, noise, and coherence, output power and polarization properties. Here we review a selection of recent advances in SC generation in a range of specialty optical fibers including fluoride, chalcogenide, telluride, and silicon-core fibers for the MIR; UV-grade silica fibers, liquid-filled and gas-filled hollow-core fibers for the UV range; and all-normal dispersion fibers for ultra-low nose coherent SC generation.

scholarly journals Actuating frequency selection of single mode Lamb waves using single piezoelectric transducer

2011 ◽  
Vol 60 (11) ◽  
pp. 114301
Author(s):  
Zhang Hai-Yan ◽  
Cao Ya-Ping ◽  
Yu Jian-Bo ◽  
Chen Xian-Hua
Keyword(s):  
Piezoelectric Transducer ◽  
Lamb Waves ◽  
Single Mode ◽  
Frequency Selection ◽  
Selection Of
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