Abstarct. At high light intensity modulation frequencies, the
photodetector measures the integral energy of the pulsed radiation. In this
case, the photoconductivity kinetics depends mainly on the rate of generation
of charge carriers. Mechanisms of recombination of electrons and holes have
little effect on the photocurrent. The article defines the conditions under
which a photoresistor can be used to reconstruct the time shape of an optical
signal. The shape, frequency and intensity of the pulses vary in an arbitrary
way. The method of reconstructing the shape of an optical signal is applicable
if the intensity varies with frequency ω more than the inverse lifetime of the main charge carriers. That
is, the frequency of the modulated optical pulses is higher than the limit
frequency of the photodetector. The dependence of the light intensity on time
is obtained from the dependence of the current strength on time. Parameters
characteristic of a photodetector fabricated on the basis of Si with In, Ag and
Au recombination centers are used in the calculations. Theoretical studies of
distortions emerging upon the detection of modulated optical signals are
performed. A region of frequencies is obtained for which the method of
obtaining the dependence of the intensity of the exciting pulses on time is
applicable. Increasing the modulation frequency reduces the magnitude of nonlinear,
frequency and phase distortion.
Keywords: impulse excitation, mechanisms of recombination, kinetics of
photoconductivity, linear distortion, nonlinear distortion, phase distortion, pulse
recovery.
References
1. Verba V.S. Aviatsionnye kompleksy radiolokacionnogo
dozora i navedenija. Principy postroenija, problemy razrabotki I osobennosti
funkcionirovanija. [Aviation Complexes of Radiolocation Watch and Guidance.
Design philosophy, problem of development and functional features] Ìoscow,
Radiotekhnika Publ. 2014. 528 p. (In Russian)
2. Antipov V.N., Koltyshev E.E., Yankovskij V.T. et al.
Radiolokacionnye kompleksy istrebitelej. [Multifunctional fighter plane
radar facilities]. Ed. by. V.N. Lepin. Ìoscow, Radiotekhnika Publ. 2014. 296 p. (In
Russian)
3. Yarlykov M.S., Bogachev. A.S., Merkulov V.I., Drogalin
V.V. Radio-ehlektronnye kompleksy navigacii, pricelivaniya i upravleniya
vooruzheni-em letatel'nyh apparatov. T.1. Teoreticheskie osnovy. [Radio-electronic
systems of navigation, guidance and weapons control aircraft. V. 1. Theoretical
foundations] Ed. by M.S. Iarlykov. Moscow, Radiotekhnika Publ. 2012. 504 p. (In
Russian)
4. Belik B.V., Belov S.G., Verba V.S. et al.
Aviacionnye sistemy ra-dioupravleniya. [Aircraft radio control system]. Ed.
by. V.S. Verba, V.I. Merkulov. Moscow, Radiotekhnika Publ. 2014. 376 p. (In Russian)
5. Skolnik M. Radar handbook Third Edition. The
McGraw-Hill Companies Publ. 2008. 1351 p.
6. Iarlykov M.S., Bogachev. A.S., Merkulov V.I., Drogalin
V.V. Radio-ehlektronnye kompleksy navigacii, pricelivaniya i upravleniya
vooruzheni-em. T.2. Primenenie aviacionnyh radioehlektronnyh kompleksov pri
reshe-nii boevyh i navigacionnyh zadach. [Radio-electronic systems of
navigation, sighting and weapons control aircraft. V. 2. Use of aviation
radio-electronic systems in solving combat and navigation tasks] Ed. by
M.S. Iarlykov. Moscow, Radiotekhnika Publ. 2012. 256 p. (In Russian)
7. Merkulov V. I., Harkov V. P., Rogov A. V. Mathematical
models of management information systems in the state space Informatsionno-izmeritelnye
i upravlayushie sistemy - Information-measuring and operating systems, 2006,
¹ 7.Vol. 4, pp. 35–44. (In Russian)
8. Verba V.S., Merkulov V.I., Drogalin V.V. et al. Ocenivanie
dalnosti i skorosti v radiolokacionnyh sistemah. [Estimation of range and
speed by radars. Part 3]. Ed. by. V.S. Verba, V.I. Merkulov. Moscow,
Radiotekhnika Publ. 2010. 472 p. (In Russian)
9. X.
Rong Li, Vesselin P. Jilkov. A Survey of Maneuvering Target Tracking. Part III:
Measurement Models. Proceedings of SPIE Conference on Signal and Data
Processing of Small Targets, San Diego, CA, USA, Juli-August 2001. (4473-41).
10. X.
Rong Li, Vesselin P. Jilkov. Survey of Maneuvering Target Tracking. Part I: Dynamic
Models. IEEE Transaction on Aerospace and Electronic Systems. Vol. 39.
No 4. October 2003. P. 1333-1363.
11. Shatovkin
R.R., Burlakov S.A. Analysis of existing approaches to modeling of movement
maneuverable air target. Materialy IX Vserossijskoj nauchno-tekhnicheskoj konferencii
«Povyshenie ehffektivno-sti sredstv obrabotki informacii na baze matematicheskogo
modelirovaniya» [IX All-Russian scientific
and technical conference "Increase in Efficiency of Means of Information
Processing on the basis of Mathematical Modelling"]. Tambov. 2009.
pp. 112-122. (In Russian)
12. Bochkarev A. M., Yur’ev A. N., Dolgov M. N.,
Shcherbinin A. V. Digital Processing of Radar Information at Target
Tracking. Zarubezhnaja Radioelektronika – Foreign radioelectronics, 1991,
No 3, pp. 3-22. (In Russian)
13. Gricenko N.S., Kirichenko A.A., Kolomejceva T.A. et
al. Estimation of maneuvering object movement parameters Zarubezhnaja
Radioelektronika – Foreign radioelectronics, 1983, No 4, pp. 3-29. (In Russian)
14. Gorshkov S.A., Solonar A.S. Comparison of adaptive
discrete filtration methods for coordinates maneuvering. Informatsionno-izmeritelnye
i upravlayushie sistemy - Information-measuring and operating systems, 2006,
¹ 6.Vol. 4, pp. 14–30. (In Russian)
15. Bar-Shalom Yaakov, Li Xiao-Rong. Multitarget-Multisensor
Tracking: Principles and Techniques. YBS Publ. 1995. 615 p.
16. Farina, F. A. Studer. Radar Data Processing:
Introduction and Tracking v. 1. Research Studies Press Publ. 1985. 348 p.
17. Kazakov I.E. Sistemy upravleniya i dinamika
navedeniya raket [Management systems and the dynamics of the missile
guidance], Moscow, VVIA im. prof. N. E. Zhukovskogo Publ., 1973, 498 p. (In
Russian)