AVESTA: Features of the Assembly Technology of Femtosecond Lasers DOI: 10.22184/1993-7296.FRos.2020.14.4.300.305
Single-Frequency Ring Semiconductor Lasers With a Fiber Cavity & Their Application DOI: 10.22184/1993-7296.FRos.2020.14.4.308.318
The results of studies of tunable single-frequency ring semiconductor lasers at a wavelength of 1550 and 1650 nm with a fiber cavity are presented. The principles of designing ring semiconductor lasers with a fiber cavity with conservation of polarization and without conservation of polarization are stated. The single-frequency operation and tuning of the wavelength of a semiconductor ring laser is substantiated. The main characteristics of semiconductor ring lasers and their applications are discussed.
Mobile Navigation Complexes on Domestic Superior LEDs for Development of the Arctic DOI: 10.22184/1993-7296.FRos.2020.14.4.338.343
The article discusses the possibility of creating lighting mobile navigation systems that provide long-range drive of aircraft along the glide path. System base – monochrome LEDs of LLC SPCOD “OPTEL”. A new parameter was proposed for navigation issues – the distribution of illumination in a plane perpendicular to the optical axis of the LED. The parameter affects the overall dimensions and tactical and technical characteristics of the designed products.
Passive Rangefinders: from Optical Systems to Optoelectronic Ones DOI: 10.22184/1993-7296.FRos.2020.14.4.344.358
Passive optical rangefinders provide stealth, but do not provide high accuracy range measurements in comparison with laser ones. New optical solutions based on a combination of digital methods and original optical solutions are proposed. The combination provides a variety of options for small-sized passive sights-rangefinders with high accuracy of measuring the distance to the target with secretive measurements.
Achromatized Lenses of Thermal Imagers DOI: 10.22184/1993-7296.FRos.2020.14.4.360.367
A description is given of the design of achromatized lenses operating in the infrared region of the spectrum (8–12 μm). When designing thermal imaging lenses, it is necessary to take into account the fact that the pixel size of modern microbolometers is 10–12 μm, and the pixel density has reached 1280 × 1024 format. These parameters determine higher requirements for image quality, resolution and field of view of the developed lens. In this case, the lens should be fast, thermally stabilized and have focus. The following lenses are considered: 4-lens with a focus of 50 mm, 3-lens with a focus of 150 mm and 7-lens with a variable focus of 30–150 mm.
Infrared Focal Plane Array Detectors: «Post Pandemic» Development Trends. Part II DOI: 10.22184/1993-7296.FRos.2020.14.4.320.330
The first part of the review (see Photonics Russia.2020; 14(3): 234–244) deals with infrared detectors of thermal imaging technology. The devices are in demand in systems and complexes of civil and medical thermography, security and fire surveillance, personal night vision and security systems. The second part of the review deals with cooled APDs for the spectral range of 3–5 microns, 8–12 microns, uncooled APDs. A comparison of thermal detectors of various types by different world manufacturers is presented. An expert forecast of changes in market growth dynamics and trends of its post-pandemic development is given.
Domestic Microcryogenics: Microcryogenic Systems for Photo Detectors DOI: 10.22184/1993-7296.FRos.2020.14.4.332.337
A standard series of Stirling microcryogenic systems has been created for photoreceiving modules operating in the IR spectral ranges of 3–5 microns and 7–14 microns. The series includes four types of Stirling reverse cycle systems of integral and differential execution. The results of tests with a cooling capacity of 400, 500, 750 mW (77K, +60 °C) are presented. In the design and manufacture of systems, technological solutions were used that increase the efficiency and service life in the temperature range of cryostatting 70–150K.
Super Absorbing Properties of Nickel-Phosphorus Alloy DOI: 10.22184/1993-7296.FRos.2020.14.4.368.374
The paper presents the research of the properties of light-absorbing coatings based on nickel-phosphorus alloy. The spectral characteristics of reflection of the coatings were analyzed at different stages of their manufacture. The reason of the super-absorption of the NiP alloy is established and the possibility of its use as a material suppressing the scattered light inside the optical path of optoelectronic devices is described, for example, in blends of stellar sensors of a spacecraft orientation system, is described.