Results 1 to 10 of about 1,160,559 (367)

Switching management in couplers with biharmonic longitudinal modulation of refractive index [PDF]

Optics Letters 34, 3544 (2009), 2009
We address light propagation in couplers with longitudinal biharmonic modulation of refractive index in neighboring channels. While simplest single-frequency out-of-phase modulation allows suppression of coupling for strictly defined set of resonant frequencies, the addition of modulation on multiple frequency dramatically modifies the structure of ...
Ablowitz, Della Valle, Dreisow, Eisenberg, Garanovich, Grossmann, Iyer, Kartashov, Kartashov, Kartashov, Kartashov, Lederer, Longhi, Longhi, Longhi, Luo, Rosberg, Staliunas, Staliunas, Szameit, Szameit, Szameit, Szameit, Victor A. Vysloukh, Yaroslav V. Kartashov   +24 more
arxiv   +3 more sources

Detection of frequency modulation at large modulation frequencies [PDF]

The Journal of the Acoustical Society of America, 1978
Several studies have been made of the minimum frequency excursions Δf required for detection of frequency modulation, with modulation frequency fm. [E. Zwicker, Acustica, 2, 125–133 (1952) R. H. Kay and D. R. Matthews, J. Physiol. 225, 657–677 (1972)]. The graph of minimum Δf vs fm has a pronounced peak at large values of fm.
William M. Hartmann
openaire   +4 more sources

Experimental Results of Underwater Acoustic Communication with Nonlinear Frequency Modulation Waveform [PDF]

Sensors, 2021
In this paper, we propose underwater acoustic (UWA) communications using a generalized sinusoidal frequency modulation (GSFM) waveform, which has a distinct ambiguity function (AF) and correlation function characteristic.
Jeongha An, Hyungin Ra, Changhyun Youn, Kiman Kim   +3 more
doaj   +2 more sources

Effect of plasma resonances on dynamic characteristics of double graphene-layer optical modulator [PDF]

, 2012
We analyze the dynamic operation of an optical modulator based on double graphene-layer(GL) structure utilizing the variation of the GL absorption due to the electrically controlled Pauli blocking effect. The developed device model yields the dependences of the modulation depth on the control voltage and the modulation frequency.
Leiman, V. G., Mitin, V., Otsuji, T., Ryzhii, M., Ryzhii, V., Shur, M. S., Yurchenko, S. O.   +6 more
arxiv   +3 more sources

Acousto-optic frequency modulator [PDF]

Siddharth Tallur and Sunil A. Bhave, "Acousto-optic frequency modulator" 2012 Solid State Sensor, Actuator and Microsystems Workshop (Hilton Head 2012), Hilton Head Island, South Carolina, June 3-7, 2012, pp. 92-93, 2012
Frequency modulation of a continuous wave laser source enables generation of photons at multiple frequencies from a single pump laser. Such multiple closely spaced laser lines are important for high data rate QAM in dense-WDM networks. In this paper we present a monolithic silicon acousto-optic frequency modulator (AOFM) operating at 1.09GHz.
Sunil A. Bhave, Siddharth Tallur
arxiv   +4 more sources

Cell modeling using frequency modulation. [PDF]

PLoS ONE
Computational models of the cell can be used to study the impact of drugs and assess pathological risks. Typically, these models are computationally demanding or challenging to implement in dedicated hardware for real-time emulation.
Jerry Jacob, Nitish Patel, Sucheta Sehgal   +2 more
doaj   +2 more sources

Frequency locking of modulated waves [PDF]

L. Recke, A. Samoilenko, A. Teplinsky, V. Tkachenko, and S. Yanchuk. Frequency locking of modulated waves. Discrete and continuous Dynamical Systems 31, 847-875 (2011), 2010
We consider the behavior of a modulated wave solution to an $\mathbb{S}^1$-equivariant autonomous system of differential equations under an external forcing of modulated wave type. The modulation frequency of the forcing is assumed to be close to the modulation frequency of the modulated wave solution, while the wave frequency of the forcing is ...
A. M. Samoilenko, A. M. Samoilenko, Alexey Teplinsky, Anatoly Samoilenko, B. P. Demidovich, B. Sartorius, C. Chicone, D. Chillingworth, D. Peterhof, J. Sieber, K. R. Schneider, L. Recke, L. Recke, Lutz Recke, M. Lichtner, M. Nizette, M. Radziunas, N. N. Bogoliubov, S. Wieczorek, Serhiy Yanchuk, U. Bandelow, U. Feiste, Viktor Tkachenko, Y. F. Yi, Y. F. Yi   +24 more
arxiv   +3 more sources

Frequency-Modulation Masking

The Journal of the Acoustical Society of America, 1969
Remote masking has been attributed to a mechanical nonlinearity in the cochlea that results in the detection of the random envelope of a band of noise. If this speculation is correct, remote masking should not appear when the masker is a band that results from frequency modulation.
Norma T. Hopkinson
openaire   +3 more sources

Autodyne Sensor Signals with Amplitude-Frequency Modulation of Radiation [PDF]

Sensors, 2020
A mathematical model of an autodyne oscillator with a combined amplitude-frequency modulation, which is under the influence of its own radiation reflected from the target, is developed.
Vladislav Noskov, Rinat Galeev, Evgeniy Bogatyrev, Kirill Ignatkov, Kirill Shaidurov   +4 more
doaj   +2 more sources

Observation of the Rotational Doppler Effect With Structured Beams in Atomic Vapor

Frontiers in Physics, 2022
A vector beam with the spatial variation polarization has attracted keen interest and is progressively applied in quantum information, quantum communication, precision measurement, and so on.
Shuwei Qiu, Jinwen Wang, Xin Yang, Mingtao Cao, Shougang Zhang, Hong Gao, Fuli Li   +6 more
doaj   +1 more source