Saturation and power in a high-gain gas laser
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Abstract:
Experimental verification has been obtained for a theory governing the output power of high-gain laser oscillators and a procedure is described for determining the saturation power of high-gain gas lasers. The experiments were conducted using a 3.51-μ xenon laser.Keywords:
Saturation (graph theory)
Self-pulsation
Gain
Gas laser
Power gain
Gain
Rate equation
Self-pulsation
Power gain
Net gain
SIGNAL (programming language)
Dynamics
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Gain
Self-pulsation
Saturation (graph theory)
Gain-switching
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Experimental verification has been obtained for a theory governing the output power of high-gain laser oscillators and a procedure is described for determining the saturation power of high-gain gas lasers. The experiments were conducted using a 3.51-μ xenon laser.
Saturation (graph theory)
Self-pulsation
Gain
Gas laser
Power gain
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Citations (15)
The paper presents investigation results on amplification and generation in supersonic flow of laser medium, flowing along laser axis, namely: 1. Opportunity to suppress laser amplifier self-oscillation and to increase maximum permissible gain is demonstrated. 2. It is shown that in supersonic flow medium splitting of gain line takes place and for that reason oscillation is double frequency in a flat resonator laser and single-frequency in each direction in a ring laser. 3. The efficiency of flowing medium laser as a master oscillator for high power lasers with phase conjugation mirror is demonstrated.
Self-pulsation
Gain
Oscillation (cell signaling)
Gas laser
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Based on the laser rate equations in a typical four-level system, we research the temperature-dependent gain characteristics of a solid-state heat-capacity laser (SSHCL) involving the small-signal gain coefficient and the gain distribution's uniformity. The influences of doping concentration of active ions and initial operating temperature on the small-signal gain coefficient are discussed for Nd-doped glass heat-capacity laser. Furthermore, the gain distributions of a slab laser gain medium operating in SSHCL mode are discussed.
Gain
Self-pulsation
Rate equation
Solar gain
SIGNAL (programming language)
Solid-state laser
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Because mode locking of a synchronously pumped dye laser is operated by modulating the gain, if we want to understand clearly the characteristics of the laser system, we must start from the gain medium and study the relationship of the gain medium and the operating characteristics of the laser system in optimum output conditions. As far as we know, a satisfactory discussion about this important problem for the synchronously pumped dye laser has not been given. Nor has the operating range for the gain at optimum output been obtained. This is because the circumstances of the laser system at threshold have not been studied in detail; thus the output criteria for the synchronously pumped dye laser cannot be given. The importance of this work has been realized, 1–3 and some special values for determined parameters have been calculated by computer, but the expression for the gain range cannot be given. Only some special values can be evaluated.
Gain
Self-pulsation
Gain-switching
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This paper presents experimental and theoretical studies of the small signal gain and the radiant power for one configuration of CO2 gasdynamic lasers to define the optimum-gas temperature, pressure and gas compositions for the gain and the laser power. The laser was operated with two gas mixtures (CO2-N2-He and CO2-N2-H2O) at temperatures of 800-2200 deg K, pressures of 2-16 atm, and a wide range of gas compositions. For this laser optimum gas temperatures were roughly 1500-1600 deg K for gain and more than 2200 deg K for power. It was found that the gasdynamic laser would not oscillate for He or H2O concentrations of less than 10% and 1%, respectively. The various kinetic processes for establishing gain and the various laser cavity parameters that determine laser power were examined. The theories were assessed for their ability to predict gain and power. In most cases, the gain theory gave excellent quantitative results whereas the power theory gave only qualitative results. Laser power of nearly 2 kw was obtained.
Gain
Power gain
Gas laser
Self-pulsation
Gas pressure
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The transverse modes of a laser resonator containing a medium with a strong radial gain profile differ greatly from the modes of a similar resonator containing a low gain medium. Focusing and defocusing effects result from the gain profile and from the associated dispersion profile. The dispersion focusing causes an asymmetry in the power output as the laser is tuned across the gain line. The theory has been verified using a high gain 3.51-micro xenon laser.
Gain
High-gain antenna
Self-pulsation
Power gain
Amplified spontaneous emission
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In order to observe and research on the output of laser with various gain distribution,different architectures of laser diode were applied.The MATLAB soft was used to simulate the gain distribution in the laser medium and the output of laser.Combining with some experiments,the influence of different laser output under different gain distribution can be analyzed,and the laser quality can be improved with relevant design.
Gain
Laser diode
Self-pulsation
Gain-switching
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Gain guiding in an old concept used in gas lasers1,2 and semi-conductors lasers. The idea is to used the gain gradient that is established when a laser medium is pumped by another laser, to concentrate the energy on the resonator axis. This guiding effect can be used in conjunction with an unstable resonator to fill the gain region. Since there is no hard aperture the energy can be extracted efficiently, while preserving good beam quality. This type of resonator is very similar to unstable resonators using a VRM, with the difference being that the gain medium becomes a gaussian aperture which can be adjusted in size by changing the pump beam diameter. Recently, S alin and Squier3 have introduced the idea that the gain guiding effect, induced in a solid-state medium pumped by a laser beam, can be used to produce high quality beams of arbitrary large diameter from unstable resonators.
Gain
Aperture (computer memory)
Self-pulsation
Power gain
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