An efficient design method of microwave oscillator circuits for minimum phase noise

1999 ◽  
Vol 47 (7) ◽  
pp. 1122-1125 ◽  
Author(s):  
M. Prigent ◽  
M. Camiade ◽  
J.C. Nallatamby ◽  
J. Guittard ◽  
J. Obregon
Keyword(s):  
Phase Noise ◽  
Design Method ◽  
Microwave Oscillator ◽  
Minimum Phase ◽  
Efficient Design ◽  
Oscillator Circuits

Low phase noise operation of microwave oscillator circuits

2000 ◽  
Vol 47 (2) ◽  
pp. 411-420 ◽  
Author(s):  
J.-C. Nallatamby ◽  
M. Prigent ◽  
E. Vaury ◽  
A. Laloue ◽  
M. Camiade ◽  
...  
Keyword(s):  
Phase Noise ◽  
Microwave Oscillator ◽  
Low Phase Noise ◽  
Oscillator Circuits

scholarly journals Microwave oscillator and frequency comb in a silicon optomechanical cavity with a full phononic bandgap

Nanophotonics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 3535-3544 ◽  
Author(s):  
Laura Mercadé ◽  
Leopoldo L. Martín ◽  
Amadeu Griol ◽  
Daniel Navarro-Urrios ◽  
Alejandro Martínez
Keyword(s):  
Phase Noise ◽  
Frequency Comb ◽  
Microwave Oscillator ◽  
New Paradigm ◽  
Mechanical Motion ◽  
Optical Fields ◽  
Optical Resonance ◽  
Processing Elements ◽  
Low Weight ◽  
Harmonic Mixing

AbstractCavity optomechanics has recently emerged as a new paradigm enabling the manipulation of mechanical motion via optical fields tightly confined in deformable cavities. When driving an optomechanical (OM) crystal cavity with a laser blue-detuned with respect to the optical resonance, the mechanical motion is amplified, ultimately resulting in phonon lasing at MHz and even GHz frequencies. In this work, we show that a silicon OM crystal cavity performs as an OM microwave oscillator when pumped above the threshold for self-sustained OM oscillations. To this end, we use an OM cavity designed to have a breathing-like mechanical mode at 3.897 GHz in a full phononic bandgap. Our measurements show that the first harmonic of the detected signal displays a phase noise of ≈−100 dBc/Hz at 100 kHz. Stronger blue-detuned driving leads eventually to the formation of an OM frequency comb, whose lines are spaced by the mechanical frequency. We also measure the phase noise for higher-order harmonics and show that, unlike in Brillouin oscillators, the noise is increased as corresponding to classical harmonic mixing. Finally, we present real-time measurements of the comb waveform and show that it can be fitted to a theoretical model recently presented. Our results suggest that silicon OM cavities could be relevant processing elements in microwave photonics and optical RF processing, in particular in disciplines requiring low weight, compactness and fiber interconnection.

An efficient design method for multi-material bolted joints used in the railway industry

2011 ◽  
Vol 94 (1) ◽  
pp. 246-252 ◽  
Author(s):  
G. Catalanotti ◽  
P.P. Camanho ◽  
P. Ghys ◽  
A.T. Marques
Keyword(s):  
Design Method ◽  
Bolted Joints ◽  
Efficient Design ◽  
Railway Industry

New Design Method of LC VCO Improving PVT Tolerance of Phase Noise

2015 ◽  
Vol 24 (3) ◽  
pp. 550-551
Author(s):  
Xuan Li ◽  
Junning Chen ◽  
Xiulong Wu
Keyword(s):  
Phase Noise ◽  
Design Method ◽  
Lc Vco

scholarly journals A Study on Configuration of Oscillator Circuits for Improving Phase Noise

2005 ◽  
Vol 125 (8) ◽  
pp. 1173-1178 ◽  
Author(s):  
Yukinori Sakuta ◽  
Yuji Arai ◽  
Yoshifumi Sekine
Keyword(s):  
Phase Noise ◽  
Oscillator Circuits

scholarly journals Efficient Design for Integrated Photonic Waveguides with Agile Dispersion

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6651
Author(s):  
Zhaonian Wang ◽  
Jiangbing Du ◽  
Weihong Shen ◽  
Jiacheng Liu ◽  
Zuyuan He
Keyword(s):  
Integrated Circuit ◽  
Frequency Comb ◽  
Design Method ◽  
Chromatic Dispersion ◽  
Nonlinear Effects ◽  
Superior Performance ◽  
Efficient Design ◽  
Linear Dispersion ◽  
Dispersion Engineering ◽  
Low Dispersion

Chromatic dispersion engineering of photonic waveguide is of great importance for Photonic Integrated Circuit in broad applications, including on-chip CD compensation, supercontinuum generation, Kerr-comb generation, micro resonator and mode-locked laser. Linear propagation behavior and nonlinear effects of the light wave can be manipulated by engineering CD, in order to manipulate the temporal shape and frequency spectrum. Therefore, agile shapes of dispersion profiles, including typically wideband flat dispersion, are highly desired among various applications. In this study, we demonstrate a novel method for agile dispersion engineering of integrated photonic waveguide. Based on a horizontal double-slot structure, we obtained agile dispersion shapes, including broadband low dispersion, constant dispersion and slope-maintained linear dispersion. The proposed inverse design method is objectively-motivated and automation-supported. Dispersion in the range of 0–1.5 ps/(nm·km) for 861-nm bandwidth has been achieved, which shows superior performance for broadband low dispersion. Numerical simulation of the Kerr frequency comb was carried out utilizing the obtained dispersion shapes and a comb spectrum for 1068-nm bandwidth with a 20-dB power variation was generated. Significant potential for integrated photonic design automation can be expected.

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