scholarly journals REDUCTION OF THE CONTROL VOLTAGE IN THE AMPLITUDE ELECTROOPTIC MODULATOR AT MULTIPLE-INTERFERENCE IN A RING RESONATOR

Doklady BGUIR ◽  
2020 ◽  
pp. 14-20
Author(s):  
A. I. Kanojka
Keyword(s):  
Optical Radiation ◽  
Ring Resonator ◽  
Single Mode ◽  
Light Energy ◽  
Control Voltage ◽  
Optical Modulators ◽  
Electric Voltage ◽  
Transmitted Radiation ◽  
Radiation Losses ◽  
Working Frequency

In this paper, it’s described a method that allows to implement highly efficient amplitude modulation of radiation at the output of a ring resonator by controlling its artificial light losses, which are derived from it using two Y-shaped couplers. At the same time, the necessary constant level of light energy is provided in the resonator, which, due to the absence of radiation losses when entering it into the ring resonator, allows one to achieve a significantly lower value of the required control electric voltage than existing electro-optical modulators, and, therefore, a smaller amount of consumed electric power and an increase in working frequency range of modulation of optical radiation. The possibility of implementing the method under consideration is ensured by the fact that the input of light energy into the ring resonator can be carried out without loss, in addition, single-mode waveguides are able to maintain the temporal coherence of transmitted radiation, which ensures the implementation of multipath interference. The stabilization of the optical characteristics of a ring resonator, which is very sensitive to changes in various external factors, for example, temperature, pressure, vibrations, can be achieved by electro-optical correction of the length of the optical path of the resonator by introducing a controlled phase element operating on the transverse electro-optical effect into the ring resonator and implementing corresponding optoelectronic feedback circuit.

scholarly journals Silicon integrated multi-mode ring resonator

Nanophotonics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 1265-1272
Author(s):  
Mengyuan Ye ◽  
Chunlei Sun ◽  
Yu Yu ◽  
Yunhong Ding ◽  
Xinliang Zhang
Keyword(s):  
Integrated Circuit ◽  
Ring Resonator ◽  
Rapid Development ◽  
Essential Element ◽  
Single Mode ◽  
Modal Dispersion ◽  
Waveguide Width ◽  
Mode Division Multiplexing ◽  
Evanescent Coupling ◽  
Multi Mode

Abstract Ring resonator is an essential element in silicon integrated circuit, it is widely used as filter, wavelength multiplexer and switch in single-mode operation regime. As the rapid development of mode division multiplexing (MDM) technique, ring resonator that can process multi-mode signals simultaneously and uniformly is highly desired. However, the severe modal dispersion makes identical transmission for different modes very hard. In this paper, by breaking through the limitation of conventional multi-mode manipulation design with evanescent coupling or mode interference, we propose and demonstrate a multi-mode ring resonator (MMRR) inspired by the free space geometric optics. Arbitrary number of supporting modes can be achieved by simply widening the waveguide width. For proof-of-concept demonstration, an MMRR supporting four modes is fabricated with uniform transmittance. Furthermore, architecture of cascaded four MMRRs are also demonstrated experimentally.

scholarly journals Closed-loop ring resonator topology for bandpass filter applications

2020 ◽  
Vol 17 (3) ◽  
pp. 1422
Author(s):  
Norfishah Ab Wahab ◽  
M. N. Md Tan ◽  
M. N. Hushim
Keyword(s):  
Transmission Lines ◽  
Closed Loop ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Single Mode ◽  
Ring Structure ◽  
Transmission Zeros ◽  
Quarter Wavelength ◽  
Coupled Lines ◽  
Loop Ring

<p class="Pa41">This paper presents a single mode pseudo-elliptic bandpass resonator based on closed-loop ring topology. The resonator is built from six quarter wavelength transmission lines to form a square closed-loop ring structure. This structure creates transmission zeros at the lower and upper sidebands so that high selectivity bandpass filter response is achieved. The advantage of this topology is that the design is less complex since no perturbation is needed on the ring lines for creation of transmission zeros. Higher-order filters can be constructed by introducing quarter-wavelength coupled-lines, coupled at both input and output of the closed-loop ring resonator. For proof of concept, the filters are designed at 10 GHz up to 3<sup>rd</sup> order, simulated using full-wave electromagnetic simulator on microstrip substrate, <em>FR-4</em> with characteristics given as <em>Ԑr </em>= 4.70, <em>h </em>= 1.499 mm and <em>tan δ </em>= 0.012.  The filters are simulated and responses are found to be agreeable with the proposed idea.</p>

scholarly journals A HIGH-POWER SOURCE OF OPTICAL RADIATION WITH MICROWAVE EXCITATION

2019 ◽  
Author(s):  
Gennadiy Ivanovich Churyumov ◽  
Oleksandr Grigorovich Denisov ◽  
Tetyana Ivanivna Frolova ◽  
Nannan Wang ◽  
Jinghui Qiu
Keyword(s):  
Energy Efficiency ◽  
High Power ◽  
Optical Radiation ◽  
Microwave Energy ◽  
Light Energy ◽  
Theory And Practice ◽  
Microwave Range ◽  
Energy Transformation ◽  
Transformation Methods ◽  
Microwave Excitation

For more than 50 years, interest to the microwave heating technology has not weakened. In addition to the traditional areas of its application, which described in detail in [1], recently there has been an expansion of technological possibilities for the use of microwave energy associated with the impact of electromagnetic waves of the microwave range on various materials (sintering of metal and ceramic powders) and media, including plasma [2]. One such new direction is the creation of high-power and environmentally friendly sources of optical radiation on the basis of an electrodeless sulfur lamp with microwave excitation [2, 3]. The purpose of this paper is to the further development of the theory and practice of microwave excitation by the electrodeless sulfur lamps, improvement the energy efficiency during energy conversion into the optical radiation and widening the application of new light sources in real practice. The results of the computer modeling of conversion process of the microwave energy into optical radiation energy are presented. The simulation results are compared with experimental data. It is shown that additional use of the solar panels for the reverse conversion of the optical radiation into DC energy with follow-up its using in the circuits of secondary power supply allows improving the energy efficiency of the light source.   References Microwave Power Engineering. Edited by E.C. Okress. V. 1, 2. Academic Press, New York &amp; London. 1968.A.N. Didenko, SVCh-energetika. Teoriya i praktika. – Moscow: Nauka. 2003.- 445 s.G. Churyumov, T. Frolova, “Microwave Energy and Light Energy Transformation: Methods, Schemes and Designs. Microwave Energy and Light Energy Transformation: Methods, Schemes and Designs” // In book “Emerging Microwave Technologies in Industrial, Agricultural, Medical and Food Processing.” Edited by Kok Yeow You, IntechOpen, 2018. pp. 75-91.

scholarly journals Tunable single mode lasing from an on-chip optofluidic ring resonator laser

2011 ◽  
Vol 98 (6) ◽  
pp. 061103 ◽  
Author(s):  
Wonsuk Lee ◽  
Hao Li ◽  
Jonathan D. Suter ◽  
Karthik Reddy ◽  
Yuze Sun ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Single Mode ◽  
On Chip

Investigation of optical radiation losses and heating of passive copper-coated silica fibers

2018 ◽  
Author(s):  
Nikolay Ishmametiev ◽  
Ivan Khramov ◽  
Renat Shaidullin ◽  
Oleg Ryabushkin
Keyword(s):  
Optical Radiation ◽  
Radiation Losses ◽  
Silica Fibers

The Structure Design and Simulation of the Ring Resonator Based on SOI Planar Optical Waveguide for the Micro Biochemical Sensor

2014 ◽  
Vol 609-610 ◽  
pp. 914-920
Author(s):  
Yang Du ◽  
Ying Dong
Keyword(s):  
Electric Field ◽  
Optical Waveguide ◽  
Ring Resonator ◽  
Single Mode ◽  
Structure Design ◽  
Silicon On Insulator ◽  
Transmission Mechanism ◽  
Planar Optical Waveguide ◽  
Ridge Structure ◽  
Biochemical Sensor

A ring resonator based on Silicon-on-Insulator (SOI) planar optical waveguide for micro biochemical sensor application is designed and simulated in this paper. The SOI optical waveguide is made with a ridge structure. According to the optical waveguide mode theory and the performance of the ring resonator, the size of the single mode ridge waveguide and the structure of the ring resonator are obtained. Based on the structure principle and the transmission mechanism of electric field of the ring resonator, the power transfer function and the parametric equation of sensitivity are derived. As a result, the value of Q of the ring resonator can reach 103 magnitudes. At last, the structure and the transmission mechanism of electric field in the ring resonator are simulated in MATLAB software.

scholarly journals Dependence of optical attenuation on radiation wavelength and waveguide geometry in copper-coated optical fibers

2020 ◽  
Vol 238 ◽  
pp. 11013
Author(s):  
Pavel Cherpak ◽  
Renat Shaidullin ◽  
Oleg Ryabushkin
Keyword(s):  
Optical Fibers ◽  
Near Infrared ◽  
Optical Loss ◽  
Single Mode ◽  
Optical Losses ◽  
Radiation Losses ◽  
Optical Attenuation ◽  
Novel Approach ◽  
Laser Sources

We demonstrate a novel approach to the determination of optical loss coefficients in metal-coated fibers in a 0.4-1.9 μm wavelength range. It is based on measuring the change of temperature-dependent electrical resistance of the metal coating caused by laser radiation transmitted through the fiber. A number of single-mode and multimode metallized fibers were investigated using several laser sources operating in visible and near infrared ranges. The spectral dependencies of optical losses of copper-coated fibers were experimentally obtained. The region that corresponds to the minimum optical losses is located near 1 μm wavelength. The increase of radiation losses in 1.5-1.9 μm region is much steeper compared to polymer-coated fibers.

scholarly journals Research of multisensor characteristics based on optical fiber

Doklady BGUIR ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 70-78
Author(s):  
A. O. Zenevich ◽  
S. V. Zhdanovich ◽  
H. V. Vasilevski ◽  
A. A. Lagutik ◽  
T. G. Kovalenko ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Minimum Distance ◽  
Optical Radiation ◽  
Radiation Power ◽  
Optical Loss ◽  
Single Mode ◽  
Optical Reflectometry ◽  
Optimal Values ◽  
The Impact ◽  
To Receive

The research results of multisensors based on optical fiber, the principle of which is to change the conditions of propagation of optical radiation in the optical fiber in the places where macro-bends are formed at the points of impact, are presented in the paper. The formation of macro-bends leads to an additional attenuation of the power of optical radiation propagating through the optical fiber. A single-mode optical fiber was used with the parameters, which are supported by numerous manufacturers and comply with the recommendations of ITU-T G.655. The measurements were carried out for four wavelengths of optical radiation (1310, 1490, 1550, 1625 nm), corresponding to the transparency windows of the optical loss spectrum of the optical fiber. Using optical reflectometry methods, it was determined that the amount of attenuation of optical radiation of each macro-bend formed at the point of action of the multisensor does not depend on the number of simultaneously formed macro-bends and also does not depend on the location of the point of action along the length of the multisensor. The dependences of the attenuation of the optical radiation power introduced by the macro-bends of the optical fiber on the radius, length, or angle of the macro-bends formed at the multisensory impact points are determined experimentally. The obtained dependences also allow one to determine the optimal parameters of the formed macro-bends of the multisensor to obtain the maximum range of attenuation change for each value of the wavelength. The values of the minimum distance between the impact points, the maximum number of impact points and the optimal values of the radius and angle of the optical fiber macro-bend at the impact points are determined. The results obtained provide opportunities to continue the development of multisensors that allow us to receive information about parameters from several impact points, that are located on a single optical fiber, simultaneously.

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