Coplanar electrode directly modulated lasers with different cavity length

2021 ◽  
Author(s):  
Borui Xu ◽  
Jiazheng Sun ◽  
Shijun Xia ◽  
Sha Zhu ◽  
Yu Liu ◽  
...  
Keyword(s):  
Cavity Length ◽  
Directly Modulated Lasers

Erosion Experiment of Self-Excited Oscillation Pulsed Jet

2014 ◽  
Vol 937 ◽  
pp. 614-619
Author(s):  
Chuan Lin Tang ◽  
Jie Pei ◽  
Dong Hu ◽  
Xiao Ting He
Keyword(s):  
Significant Influence ◽  
Cavity Length ◽  
Experimental Studies ◽  
The Self ◽  
Erosion Depth ◽  
Pulsed Jet ◽  
Excited Oscillation ◽  
Erosion Effect ◽  
Erosion Volume ◽  
Peak Value

In order to improve the erosion effect of jet under submergence condition, experimental studies of erosion generated from the self-excited pulsed jet was carried out by using developed self-excited oscillation nozzle. The erosion volume and depth of pulsed jet were measured and taking mortar block as an erosion part. The results were that the standoff has significant influence on erosion effect. The erosion volume firstly decreases with increases in cavity length and then increases to a peak value. Erosion volume of pulsed jet is significantly higher than that of continuous jet, the erosion depth of two jet has slight difference.

The pattern of mode competition between two frequencies produced by mode split technology by tuning of the cavity length

1992 ◽  
Vol 90 (4-6) ◽  
pp. 279-282 ◽  
Author(s):  
Shulian Zhang ◽  
Kelan Li ◽  
Minxian Wu ◽  
Guofan Jin
Keyword(s):  
Cavity Length ◽  
Mode Competition ◽  
Mode Split

scholarly journals Influence of Thermodynamic Effect on Blade Load in a Cavitating Inducer

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Kengo Kikuta ◽  
Noriyuki Shimiya ◽  
Tomoyuki Hashimoto ◽  
Mitsuru Shimagaki ◽  
Hideaki Nanri ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Liquid Nitrogen ◽  
Cavity Length ◽  
Cold Water ◽  
Pressure Rise ◽  
Cavitation Number ◽  
Design Parameters ◽  
Trailing Edge ◽  
Thermodynamic Effect ◽  
Blade Tip

Distribution of the blade load is one of the design parameters for a cavitating inducer. For experimental investigation of the thermodynamic effect on the blade load, we conducted experiments in both cold water and liquid nitrogen. The thermodynamic effect on cavitation notably appears in this cryogenic fluid although it can be disregarded in cold water. In these experiments, the pressure rise along the blade tip was measured. In water, the pressure increased almost linearly from the leading edge to the trailing edge at higher cavitation number. After that, with a decrease of cavitation number, pressure rise occurred only near the trailing edge. On the other hand, in liquid nitrogen, the pressure distribution was similar to that in water at a higher cavitation number, even if the cavitation number as a cavitation parameter decreased. Because the cavitation growth is suppressed by the thermodynamic effect, the distribution of the blade load does not change even at lower cavitation number. By contrast, the pressure distribution in liquid nitrogen has the same tendency as that in water if the cavity length at the blade tip is taken as a cavitation indication. From these results, it was found that the shift of the blade load to the trailing edge depended on the increase of cavity length, and that the distribution of blade load was indicated only by the cavity length independent of the thermodynamic effect.

scholarly journals Effects of Leading Edge Sweep on Unsteady Cavitation in Inducers : 1st Report, Improvements of Cavity length Due to Forward and Backward Sweep

2001 ◽  
Vol 67 (656) ◽  
pp. 903-910 ◽  
Author(s):  
Yoshinobu TSUJIMOTO ◽  
Yoshiki YOSHIDA ◽  
Allan J ACOSTA ◽  
Seiji AZUMA ◽  
Stephane LAFFITE
Keyword(s):  
Cavity Length ◽  
Leading Edge

scholarly journals Quantum dash based directly modulated lasers for long‐reach access networks

2014 ◽  
Vol 50 (7) ◽  
pp. 534-536 ◽  
Author(s):  
S. Joshi ◽  
N. Chimot ◽  
L.A. Neto ◽  
A. Accard ◽  
J.‐G. Provost ◽  
...  
Keyword(s):  
Access Networks ◽  
Quantum Dash ◽  
Directly Modulated Lasers

CURRENT INDUCED ENTANGLEMENT OF DOUBLE QUANTUM DOT EXCITONS

2003 ◽  
Vol 02 (06) ◽  
pp. 527-534
Author(s):  
YUEH-NAN CHEN ◽  
DER-SAN CHUU
Keyword(s):  
Quantum Dot ◽  
Cavity Length ◽  
Oscillatory Behavior ◽  
Entangled State ◽  
Double Quantum ◽  
Single Photons ◽  
Purcell Effect ◽  
Double Quantum Dot ◽  
Photon Trapping

We propose to measure Purcell effect by observing the current through a semeiconductor quantum dot embedded inside a microcavity. The stationary current is shown to be altered if one varies the cavity length. For the double-dot system, we find that the stationary current shows oscillatory behavior as one varies the inter-dot distance. Furthermore, the current is suppressed if the dot distance is small compared to the wavelength of the emitted photon. This photon trapping phenomenon generates the entangled state and may be used to control the emission of single photons at predetermined times.

Base-Vented Hydrofoils of Finite Span Under a Free Surface: An Experimental Investigation

1984 ◽  
Vol 28 (02) ◽  
pp. 90-106
Author(s):  
Jacques Verron ◽  
Jean-Marie Michel
Keyword(s):  
Experimental Investigation ◽  
Free Surface ◽  
Flow Rate ◽  
Cavity Length ◽  
Three Dimensional ◽  
Leading Edge ◽  
Pulsation Frequency ◽  
Cavity Pressure ◽  
Air Flow Rate ◽  
Cavity Configuration

Experimental results are given concerning the behavior of the flow around three-dimensional base-vented hydrofoils with wetted upper side. The influence of planform is given particular consideration so that the sections of the foils are simple wedges with rounded noses. Results concern cavity configuration, the relation between the air flow rate and cavity pressure, leading-edge cavitation, cavity length, pulsation frequency, and force coefficients.

Characterization of the dynamics of an FDML laser during closed-loop cavity length control

2021 ◽  
Author(s):  
Simon Lotz ◽  
Christin Grill ◽  
Madita Göb ◽  
Wolfgang Draxinger ◽  
Jan Philip Kolb ◽  
...  
Keyword(s):  
Closed Loop ◽  
Cavity Length

Design and Simulation of an Electrically Pumped SPASER

2021 ◽  
Author(s):  
Ali Fattah ◽  
Abdolber Mallah Livani ◽  
Eliye Norouzi
Keyword(s):  
Surface Plasmons ◽  
Power Efficiency ◽  
Population Inversion ◽  
Cavity Length ◽  
Optical Gain ◽  
Photonic Devices ◽  
Forward Voltage ◽  
Pn Junction ◽  
Inversion Condition ◽  
Resonance Cavity

Abstract In this investigation, a novel SPASER is designed and simulated which uses a forward biased pn junction to induce population inversion condition. Simulations are performed by means of SILVACO software. In the proposed structure, the active region is considered as a direct bandgap material (InGaAs) and a larger bandgap material (InP) is used for p and n regions to form heterojunctions. This pn junction is in contact with gold and surface plasmons propagate along their interface. Free space wavelength of the oscillations of surface plasmons is 1550nm that is used in photonic devices, frequently. To form the resonance cavity of the SPASER, two high reflective mirrors are placed at the ends of the plasmonic waveguide. Applied forward voltage and absorption coefficient of the SPASER are 1.2V and − 0.33cm− 1, respectively. Thus, the optical gain for a 50 microns cavity length is 1cm− 1. Moreover, the power consumption of the proposed device at these conditions is 1.2mW. The output plasmonic power is 0.6mW which yields 50% power efficiency.

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