Ultrafast all-optical wavelength conversion in silicon waveguides using femtosecond pump-probe pulses

Experimental results on ultrafast all-optical wavelength conversion in silicon-on-insulator waveguides are presented. Red and blue shifts of 10nm have been observed in femtosecond pump-probe experiments. Alloptical switching and the importance of waveguide dispersion are discussed

Современное состояние и перспективы развития ООПТ Томской области

В работе дана характеристика сети особо охраняемых природных территорий Томской области, ее роли в поддержании эколого-хозяйственного баланса области. Определены этапы формирования сети ООПТ. Дан анализ географического разнообразия сети ООПТ и представленности ее в административных районах области. Определена роль сети ООПТ в сохранении редких и исчезающих видов растений и животных. Разработана и реализована методика комплексной оценки эффективности сети ООПТ. Предложены пути ее развития и оптимизации.In work the characteristic of the network of specially protected natural territories of the Tomsk region, its role in maintaining ecological and economic balance of the region. The stages of forming a network of protected areas. The analysis of the geographic diversity of the PA network and its representation in the administrative districts of the region. Defined the role of the network of protected areas in the conservation of rare and endangered species of plants and animals. Developed and implemented a methodology of comprehensive evaluation of the effectiveness of the PA network. The proposed ways of its development and optimization

Исследование датчиков рН и удельной электрической проводимости фирмы WTW в системе автоматизированного контроля качества очистки сточных вод

We demonstrate the suitability of microcavities based on circular grating resonators (CGRs) as fast switches. This type of optical resonator is characterized by a high quality factor and very small mode volume. The waveguide-coupled CGRs are fabricated with silicon-on-insulator technology compatible with standard complementary metal-oxide semiconductor (CMOS) processing. The linear optical properties of the CGRs are investigated by transmission spectroscopy. From 3D finite-difference time-domain simulations of isolated CGRs, we identify the measured resonances. We probe the spatial distribution and the parasitic losses of a resonant optical mode with scanning near-field optical microscopy. We observe fast all-optical switching within a few picoseconds by optically generating free charge carriers within the cavity. (C) 2009 Optical Society of Americ

Проектирование системы электроснабжения электротехнического завода

В процессе исследования произведен расчет нагрузок трансформаторного и базы в целом с применением различных методов, выбор метода расчета производился на основе исходных данных, а также осуществлен выбор оборудования и его проверка при различных режимах работы. В результате исследования была спроектирована конкретная модель электроснабжения базы по обслуживанию нефтегазодобывающего месторождения, представлена ее экономическая целесообразность и безопасность для окружающей среды.In the process of studying the calculation of the load and base as a whole with the use of various methods, the choice of the calculation method on the basis of the initial data, and also the selection of equipment and its verification under various operating modes was carried out. As a result of the research, a specific model of power supply for the oil and gas industry maintenance base, its economic feasibility and safety for the environment was designed

Silicon-organic hybrid electro-optical devices

Organic materials combined with strongly guiding silicon waveguides open the route to highly efficient electro-optical devices. Modulators based on the so-called silicon-organic hybrid (SOH) platform have only recently shown frequency responses up to 100 GHz, high-speed operation beyond 112 Gbit/s with fJ/bit power consumption. In this paper, we review the SOH platform and discuss important devices such as Mach-Zehnder and IQ-modulators based on the linear electro-optic effect. We further show liquid-crystal phase-shifters with a voltage-length product as low as V pi L = 0.06 V.mm and sub-mu W power consumption as required for slow optical switching or tuning optical filters and devices

Технологические решения для строительства эксплуатационной наклонно-направленной скважины глубиной 3673 метров на Арчинском нефтегазоконденсатном месторождении (Томская область)

Цель работы – технологические решения для строительства наклонно-направленной скважины глубиной 3673 метров на Арчинском нефтегазоконденсатном месторождении. В процессе исследования в специальной части теоретически рассмотрели возможность качественного вскрытия продуктивных пластов на депрессии. В результате исследования Разработаны мероприятия по организации строительства, охране труда и окружающей среды. Степень внедрения: на аналитическом уровне.Purpose – technological solutions for the construction of directional well with a depth of 3673 meters Archinskoye oil and gas condensate field. In the process of research in special parts theoretically considered the possibility of qualitative opening of productive layers on depression. The study Developed measures for the organization of construction, occupational safety and the environment. Level of implementation: at the analytical level

Silicon-Organic Hybrid (SOH) and Plasmonic-Organic Hybrid (POH) integration

Silicon-organic hybrid (SOH) and plasmonic-organic hybrid (POH) integration combines organic clectro-optic materials with silicon photonic and plasmonic waveguides, The concept enables fast and power-efficient modulators that support advanced modulation formats such as QPSK and 16QAM

Silicon-Organic Hybrid (SOH) and Plasmonic-Organic Hybrid (POH) integration

Silicon photonics offers tremendous potential for inexpensive high-yield photonic-electronic integration. Besides conventional dielectric waveguides, plasmonic structures can also be efficiently realized on the silicon photonic platform, reducing device footprint by more than an order of magnitude. However, nei-ther silicon nor metals exhibit appreciable second-order optical nonlinearities, thereby making efficient electro-optic modulators challenging to realize. These deficiencies can be overcome by the concepts of silicon-organic hybrid (SOH) and plasmonic-organic hybrid integration, which combine SOI waveguides and plasmonic nanostructures with organic electro-optic cladding materials