Prof. Dr. Andrei Tsarev
Rzhanov Institute of Semiconductor Physics SB RAS
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Academic Career Length
48Years (1979-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 January 2005 in Optics Express
Journal Article
VPVittorio M. N. Passaro
Vittorio M. N. Passaro
FMFrancesca Magno
Francesca Magno
Andrei TsarevThe paper presents an analysis of thermo-optic phase shifters in silicon-on-insulator (SOI) waveguide structures. It gives recommendations to provide high tuning characteristics at minimum power requirements. Then, this analysis is applied to the description of a novel type of reconfigurable optical add/drop multiplexer (ROADM) utilizing multi-reflector (MR) beam expanders and thermo-optic tuning in SOI structures. It is intended for use in high dense wavelength-division-multiplexing (HDWDM) flexible fiber-optic networks having multi-hundreds wavelength channels and advanced ITU grids (12.5 GHz, 25 GHz, 50 GHz).
1 July 2011 in Optics Express
Journal Article
Andrei TsarevMultiple optical elements utilize crossing of channel optical waveguides. This paper introduces efficient silicon wire waveguide crossing by means of vertical coupling of tapered Si wire with upper polymer wide strip waveguide through a silica buffer. Numerical simulations by 3D FDTD prove that optimal structure of 70 µm length can provide 98% efficiency for through pass and 99.9% efficiency for cross pass, as well as negligible back reflection (−50 dB) and cross talk (−70 dB). Proposed waveguide crossing on thin silicon-on-insulator CMOS compatible structures could find multiple applications in Photonics.
1 January 2008 in Optics Express
Journal Article
Andrei TsarevFLFrancesco De Leonardis
Francesco De Leonardis
Vittorio PassaroThis work presents an analysis and simulation of novel heterogeneous silicon-on-insulator (SOI) waveguide structures for reconfigurable optical add/drop multiplexers (ROADMs) with thermo-optic tuning and multi-reflector beam expanders. New structure design includes p + side-doping of SOI ridge waveguide with 220 nm×16 µm silicon core. It provides quasi mono-mode behavior due to strongly mode-dependent optical losses by free charge absorption. These silicon heterogeneous waveguides are used to investigate ROADMs including nano-structured 2D-gratings for fiber coupling and polarization diversity, nano-grooves or p + doping reflector strips for multi-reflector beam expanders and local heaters for wideband thermo-optic tuning.
1 September 1982 in Optics Communications
Journal Article
EKE.A. Kolosovsky
E.A. Kolosovsky
DPD.V. Petrov
D.V. Petrov
Andrei TsarevIYI.B. Yakovkin
I.B. Yakovkin
3 April 2012 in Journal of Lightwave Technology
Journal Article
Vittorio PassaroAndrei TsarevFLFrancesco De Leonardis
Francesco De LeonardisIn this paper, the wavelength interrogation of optical sensors by novel thermo-optic tunable filters with multiple partially reflected slanted mirrors in silicon-on-insulator (SOI) technology is presented. The tunable filter is used both for tunable band selection of broadband light source interrogating the optical sensors, as well as for precise detection of interrogation optical wavelength. New interrogator design is numerically studied by 2-D finite-difference time-domain and finite-element method for a compact structure. The investigation demonstrates the performance of an interrogator on SOI, 1 cm long, having about 1 pm wavelength resolution and 1 ms scanning over 40 nm range at 1550 nm, with an operation power of about 16 mW.
31 December 1981 in Soviet Journal of Quantum Electronics
Journal Article
A description is given of a method for reconstructing the refractive index profile of diffused waveguides on the basis of inversion of the WKB formula. It is shown that this method can be used to reconstruct equally accurately both parabolic and exponential profiles. Additional data (the mode spectrum determined at several wavelengths and the effects of different coatings on a waveguide) make it possible to find the profiles of few-mode waveguides. Determination of the effective refractive indices of the TE and TM modes for two directions of propagation in the plane of an anisotropic waveguide gives the necessary data for the reconstruction of the profile of all the components of the permittivity tensor.
About Me
Andrei Tsarev (M’77) was born in Kuybyshev, Russia, in April 1955. He received a Diploma degree in Physics (M.S.) from Novosibirsk State University, Novosibirsk, Russia, in 1977, as well as a Degree of Candidate of Sciences (Ph.D.) and a Doctor of Sciences degree from the A. V. Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences (ISP SB RAS), Novosibirsk, Russia, in 1983 and 2008, respectively. Since 1977, he has been with the ISP SB RAS, where he is currently a Chief Scientist and the Head of the NanoPhotonics and Integrated Optics Group. He has investigated the propagation of optical waves and interactions with surface acoustic waves in semiconductors and inhomogeneous and anisotropic waveguide structures. In recent years, he has conducted intensive investigations on sensors, silicon photonics, and microwave photonics. He has published over 100 scientific papers (Scopus ID: 7004023802), as well as three U.S. and three Russian patents.