2019: Top Ten Trends In Light Technologies Light technologies are at the heart of today’s world, enabling the most sophisticated processes and procedures. See – ten significant trends in the application of light technologies, each of which is the result of many small, incremental advances and all offer abundant opportunity.
Treatment Of Details Of Metal-Optics On Ultraprecision Machine «Sphere100-F4» The article presents the main design features of an ultra-precision machine for machining metal-optical parts, as well as its technical and technological characteristics. The process and main features of the processing of optical details such as "Shell" are described. The results of the test detail processing are presented.
Identification And Adjustment Of Geometric And Dynamic Errors In the areas of production, where we are talking about micro and nano-meter values, which include laser cutting, scribing, lithography, holography, 3D printing, additive technologies, etc., it is extremely important to ensure the stability and repeatability of geometric and dynamic errors in process time. In particular, the main parameters characterizing the quality of mechanical positioners are: precision, two-way repeatability, tracking error, and decay time. To obtain high-quality motion control and accurate product geometry, it is necessary to provide high-frequency selective current vector control, and to perform a selective calibration of static errors of the positioner. This article analyses one of the ways to reduce errors and improve the quality parameters of the positioner.
Using Advances Of The Optical Parametric Oscillators In Molecular Physics And Quantum Nanophotonics Optical parametric oscillators offer a competitive alternative to conventional lasers for molecular physics and quantum nanophotonics (done on the article J. Sperling and K. Hens, HЬBNER PHOTONICS).
Modular Switched Mode Power Supply For Diode-Pumped Lasers The results of the research of the market of diode-pumped lasers revealed a sharp difference in the demand for power supply products of diode arrays between Russian and foreign customers. Taking into account these features based on the modularity principle, a compact pulsed power supply for mobile laser devices was developed. The power supply meets the requirements for lasers: increased power (over 5 kW), accuracy of current stabilization, small front and cut-off pump pulses (no more than 15–20 µs), reduced weight and size characteristics, and a wide range of operating temperatures. A new modular switched mode power supply for diode-pumped lasers greatly simplifies laser manufacturers to solve the problems of powering laser diodes and tuning drivers when assembling mobile laser systems.
Integral Microcryogenic Stirling Systems As A Part Of Cryostatting Photoreceiving Modules Based On Long Ir Region Matrix The most important component of the cooled photoreceiving modules is the micro cryogenic cryostat system, which largely determines the technical and operational characteristics of the product. JSC "ODB "ASTORN" has developed and put into production the designs of microcryogenic cryostatting systems. This development is an integral part of the ASTRON’s development program, where the photoreceiving modules of the 7–14 µm band with the size of 384 Ч 288 and 640 Ч 480 elements are developed and put into production.
Information Capacity Of Facet Optoelectronic Systems Modern microminiature digital photo and video cameras are built according to the principles typical for the facet eye of insects. The desire to increase the number and size of the pixels used by the photomatrix obviously has technological limitations that determine the information capacity of the system. At the same time, there are theoretical limitations of information capacity. First of all, these are diffraction limitations that determine the limit of spatial resolution for micro-optical systems. In addition, these are energy limitations related to the signal-to-noise ratio during exposure. In the article these factors limiting the information capacity of the system are considered and formulas are obtained that allow to determine the rational combination of parameters of the facet optoelectronic system and calculate its information capacity taking into account the noted limitations. The parameters of known foreign developments are close to those calculated by the above formulas.
See The Invisible: Visualization Of Physical Fields In Semiconductor Materials This article deals with the results of theoretical and experimental studies of the possibilities of visualizing the effects of external thermal, electromagnetic and acoustic fields on a semiconductor material by radiation from the spectral range of the material’s fundamental absorption edge.
Fiber Reception Units: Receiving And Processing Methods Of The Various Types Signals When operating fiber-optic communication lines with signals of a certain shape, matching of the receiving and transmitting modules is required over the dynamic range of optical signals, operating wavelength, fiber types and optical connectors. In order to satisfy such diverse requirements for fiber optic lines for operation under climatic, mechanical and electromagnetic effects, sets of functionally complete modules have been developed. Optical receiving modules for various applications are presented, including – for control systems and startup devices that commute significant power.
Amplitude Fiber-Optic Vibration Sensor Fiber-optic vibration sensors have a number of indisputable advantages over electrical sensors when working close to existing power generators or in high explosion-proof conditions. The principle of operation of the amplitude fiber optic vibration sensor is based on the violation of the law of total internal reflection. The article deals with the concept of a vibration sensor, describing the results of experimental studies of the prototype.
0.97 And 1.94 Mkm Wavelength Laser Radiation Effect On The Oral Mucous Membrane Regeneration In The Experiment The article presents data on the peculiarities of the processes of regeneration of wounds of the oral mucous membrane of laboratory animals after exposure to laser radiation with a wavelength of 1.94 µm and 0.97 µm at various radiation powers. It is known that oral mucous membrane exposed to laser radiation is prone to coagulation necrosis and the subsequent inflammatory reaction of the tissue with destruction of the epithelium, mucous membrane and partially muscular tissue. It has been established that tissue regeneration and wound defect healing slows down with increasing power.
Optical Properties And Applications Of Germanium In Photonics Two windows of atmospheric transparency in the infrared (IR) region of 3–5 µm and 8–14 µm almost overlap with the region of maximum transmission of germanium (Ge). Ge is transparent in the 1.8–23 µm range (although a number of phonon absorption bands are present in the 11–23 µm region), there is also a transparency window in the terahertz (THz) spectral range (~ 100–300 µm). Due to its physicochemical properties, crystalline germanium is one of the backbone materials of IR photonics and its use amounts to 25–30% of the total consumption pattern of this material. The article provides an overview of the using of the material in photonics in depending on the thermoelastic stresses arising during crystal growth, impurity heterogeneity, and structural defects.