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International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices

Brightness amplifiers with PRF up to 100 kHz

Maxim V. Trigub, Dmitrii V. Shiyanov, Vasilii V. Vlasov

Published Jun 1, 2014• 13 citations
Publisher

Abstract

In this paper the design of high speed brightness amplifiers on transitions of copper and manganese atoms is discussed. A possibility of obtaining images in active optical systems with a brightness amplifier operating at 100 kHz frequency is demonstrated. The results of comparing the images obtained using brightness amplifiers on copper bromide and manganese bromide vapors are given.

DOI
10.1109/edm.2014.6882534

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In this paper the design of high speed brightness amplifiers on transitions of copper and manganese atoms is discussed. A possibility of obtaining images in active optical systems with a brightness amplifier operating at 100 kHz frequency is demonstrated. The results of comparing the images obtained using brightness amplifiers on copper bromide and manganese bromide vapors are given.
The use of metal atom active media allows to convert optical signals with the transferring of the adjusted contrast. Due to the opportunities of metal vapor active media it makes possible to increase the intensity of the signal in the narrow spectral range. As a result, the signal-to-noise ratio can be dramatically increased. It makes possible to build active optical systems for high speed imaging of processes which are hidden by high intensive radiation. In the systems is available the image active filtration due to induced transition on metal atoms. Active optical systems with metal vapor brightness amplifiers (which is called Laser monitor), have shown the high efficiency for reducing the background radiation effect on the observing processes in the real-time mode. Moreover, the use of different active media makes it possible to change the spectral contest of the input signal with the increasing of the intensity. In the work the result of the research such systems are presented. The method of transformation IR images to VIS images is discussed. The work presents the results of the using of different active optical systems for high speed imaging.
An experimental study was made of the conditions for the appearance of negative images, formed using the green (510.5 nm) and yellow (578.2 nm) lines of the copper atom, in a laser projection microscope and in an oscillator–amplifier system. The energy and spatial characteristics of the negative images were investigated. It was found that quite sharp negative images were obtained when the plane of an intermediate image was located within the active medium. A rise in the intensity of the light beams carrying negative images was discovered on introduction of a diffuse scatterer into the system.
Abstract The paper is devoted to research the single-pass operating mode of active element on copper bromide vapors and time dependence of ratio «signal/ASE». The results show how the single-pass radiation power depends on time delay between ASE pulse and moment when the input signal enters to active element. Light waveforms (ASE, input signal, output signal) are recorded at each time delay. The minimal time delay was 5.2 ns, power radiation in this case was 3.47 W. The radiation power was reducing as the time delay was increased in increments of about 2 ns. The waveforms prove that the active element output signal contains two components: the first – ASE (amplified spontaneous emission), which is formed as result of the active substance atom excitation and their further spontaneous transitions; the second – single-pass radiation amplified by means of inverse population of the active media. The waveforms allow to estimate the useful signal to noise ratio or other words «signal/ASE». The highest gain is provided with the lowest time delay due to the population inversion is maximum in this case.