Study of the Process of Mixing, Temperature, and Small Signal Gain in the Active Medium of Supersonic COIL With Advanced Nozzle Bank and DC Discharge Method of O2(1 Delta) Production in a Vortex Tube

2001 ◽  
Author(s):  
Valeri Nikolaev
Keyword(s):  
Active Medium ◽  
Vortex Tube ◽  
Small Signal Gain ◽  
Small Signal ◽  
Signal Gain ◽  
Dc Discharge ◽  
Discharge Method

Small-signal gain and kinetic processes on highly excited vibrational levels in active medium of pulsed first-overtone CO laser

2002 ◽  
Author(s):  
Andrei A. Ionin ◽  
Andrei A. Kotkov ◽  
Yurii M. Klimachev ◽  
Leonid V. Seleznev ◽  
Dmitrii V. Sinitsyn ◽  
...  
Keyword(s):  
Active Medium ◽  
Small Signal Gain ◽  
Small Signal ◽  
Co Laser ◽  
Signal Gain ◽  
Vibrational Levels ◽  
Kinetic Processes

Quenching of the forward Stokes by phase matching

1986 ◽  
Vol 64 (6) ◽  
pp. 743-745
Author(s):  
R. Marchand ◽  
R. Fedosejevs ◽  
I. V. Tomov
Keyword(s):  
Laser Pulse ◽  
Active Medium ◽  
Raman Laser ◽  
Pump Intensity ◽  
Parameter Range ◽  
Phase Matching ◽  
Small Signal Gain ◽  
Small Signal ◽  
Signal Gain ◽  
Pulse Compressor

Quenching of the forward Stokes by phase matching in a Raman-active medium is revisited. A parameter range is identified where the small signal gain of the forward Stokes is a decreasing function of the pump intensity. The relevance of this effect to the reduction of the troublesome second Stokes in a Raman laser-pulse compressor is also discussed.

Influence of small oxygen additions on the small-signal-gain dynamics in the active medium of a pulsed electron-beam-controlled discharge CO laser

2008 ◽  
Vol 38 (9) ◽  
pp. 833-839 ◽  
Author(s):  
A A Ionin ◽  
Yu M Klimachev ◽  
A Yu Kozlov ◽  
A A Kotkov ◽  
A K Kurnosov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Active Medium ◽  
Small Signal Gain ◽  
Small Signal ◽  
Co Laser ◽  
Signal Gain ◽  
Pulsed Electron Beam

Optimization of InP DHBT stacked-transistors for millimeter-wave power amplifiers

2018 ◽  
Vol 10 (9) ◽  
pp. 999-1010 ◽  
Author(s):  
Michele Squartecchia ◽  
Tom K. Johansen ◽  
Jean-Yves Dupuy ◽  
Virginio Midili ◽  
Virginie Nodjiadjim ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Output Power ◽  
Heterojunction Bipolar Transistors ◽  
Power Amplifiers ◽  
Small Signal Gain ◽  
Small Signal ◽  
Large Signal ◽  
Signal Gain ◽  
Power Added Efficiency ◽  
Saturated Output Power

AbstractIn this paper, we report the analysis, design, and implementation of stacked transistors for power amplifiers realized on InP Double Heterojunction Bipolar Transistors (DHBTs) technology. A theoretical analysis based on the interstage matching between all the single transistors has been developed starting from the small-signal equivalent circuit. The analysis has been extended by including large-signal effects and layout-related limitations. An evaluation of the maximum number of transistors for positive incremental power and gain is also carried out. To validate the analysis, E-band three- and four-stacked InP DHBT matched power cells have been realized for the first time as monolithic microwave integrated circuits (MMICs). For the three-stacked transistor, a small-signal gain of 8.3 dB, a saturated output power of 15 dBm, and a peak power added efficiency (PAE) of 5.2% have been obtained at 81 GHz. At the same frequency, the four-stacked transistor achieves a small-signal gain of 11.5 dB, a saturated output power of 14.9 dBm and a peak PAE of 3.8%. A four-way combined three-stacked MMIC power amplifier has been implemented as well. It exhibits a linear gain of 8.1 dB, a saturated output power higher than 18 dBm, and a PAE higher than 3% at 84 GHz.

Toward a zero small‐signal gain laser power amplifier

1974 ◽  
Vol 25 (10) ◽  
pp. 602-605 ◽  
Author(s):  
G. T. Schappert ◽  
E. E. Stark
Keyword(s):  
Power Amplifier ◽  
Laser Power ◽  
Small Signal Gain ◽  
Small Signal ◽  
Signal Gain
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