An self-oscillating parametric optical transducer based on a quantum double-barrier heterostructure is proposed, the basic element of which is a tunnel-resonant diode, and it acts as a primary optical transducer and as an selfoscillating, which greatly simplifies the design of the optical transducer. Based on the consideration of physical processes in the tunnel-resonant diode, a mathematical model of the optical transducer was developed, on the basis of which the parametric dependence of the conversion and sensitivity functions was obtained. It is shown that the main contribution to the change of transformation functions and sensitivity is introduced by a change in optical power. This causes a change in the negative differential resistance of the oscillating system of the self-oscillating of the transducer, which, in turn, changes the output frequency of the device. At the same time, the internal capacitance and inductance also depend on the action of the optical power, but these changes do not affect the output frequency, since the external capacitance and inductance are four orders of magnitude greater than the internal capacitance and inductance of the tunnel-resonant diode. The sensitivity of the optical transducer varies from 15.27 kHz/μW/cm2 to 16.37 kHz/μW/cm2 in the measuring power range from 0 to 100 μW/cm2.
KEYWORDS: Telecommunications, Navigation systems, Laser systems engineering, Laser development, Signal processing, Optical filters, Atmospheric optics, Optical communications, Digital signal processing, Computing systems
The article introduces an approach to solving the problem of small beam divergence in data transmission using lasers. A combined model for calculating and classifying laser beam spots is developed, the developed scheme is modeled and the solution speed is analyzed. , the developed method showed good efficiency and can be used for calculating the coordinates of laser beam spots and their further classification. It can be useful in such systems as laser beam profiling systems, fiber optic communication systems, laser navigation and tracking systems in military affairs, and atmospheric optical communication lines.
KEYWORDS: Visualization, 3D modeling, Skin, Image acquisition, Performance modeling, 3D image processing, Data modeling, Light sources and illumination, Light sources, Process modeling
New modifications of the Cook-Torrance and Ward models are proposed, which differ from the known uses when calculating only one function and smaller degrees of polynomials, which makes it possible to improve the performance of three-dimensional image formation taking into account the offset properties of surfaces.
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