scholarly journals Fiber-based biphoton source with ultrabroad frequency tunability

2021 ◽  
Author(s):  
Santiago Lopez-Huidobro ◽  
Nicolas Joly ◽  
Markus Lippl ◽  
Maria Chekhova
Keyword(s):  
Frequency Tunability

Generation of Millimeter Waves with Fine Frequency Tunability Using Mach-Zehnder-Modulator-Based Flat Comb Generator

2013 ◽  
Vol E96.C (2) ◽  
pp. 192-196 ◽  
Author(s):  
Isao MOROHASHI ◽  
Yoshihisa IRIMAJIRI ◽  
Takahide SAKAMOTO ◽  
Tetsuya KAWANISHI ◽  
Motoaki YASUI ◽  
...  
Keyword(s):  
Millimeter Waves ◽  
Frequency Tunability ◽  
Mach Zehnder Modulator

TUNABLE COHERENT RADIATION FROM TERAHERTZ TO MICROWAVE BY MIXING TWO INFRARED FREQUENCIES IN A 47-MM-LONG GaSe CRYSTAL

2006 ◽  
Vol 16 (02) ◽  
pp. 589-595 ◽  
Author(s):  
WEI SHI ◽  
YUJIE J. DING
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Peak Power ◽  
Power Conversion ◽  
Coherent Radiation ◽  
Monochromatic Radiation ◽  
Frequency Tunability ◽  
Photon Conversion ◽  
Tunable Coherent Radiation ◽  
Infrared Frequencies

By mixing two infrared radiations near 1 μm in a 47-mm-long GaSe crystal, we efficiently generated a monochromatic radiation which has frequency tunability from 4.51 THz down to 53 GHz. The highest peak power produced by us is 389 W at 203 μm (1.48 THz), which corresponds to the photon conversion efficiency of 19% (the power conversion efficiency of 0.098%).

scholarly journals A Novel Dual-Band Conformal Surface Plasmons Waveguide With Tunable Frequency Response In Large-scale

2021 ◽  
Author(s):  
Yijiao Fang ◽  
Jiangwei Zhong
Keyword(s):  
Surface Plasmons ◽  
Fundamental Mode ◽  
Large Scale ◽  
Dual Band ◽  
Single Frequency ◽  
Dual Frequency ◽  
Microwave Frequencies ◽  
Frequency Tunability ◽  
Tunable Frequency ◽  
Almost All

Abstract A novel dual-band conformal surface plasmons (CSPs) waveguide is designed and well studied in this paper. In earlier researches, we have recognized that electromagnetic field of CSPs waveguide are always confined to a sub-wavelength area and have a strong potential to be applied in devices designing. However, almost all of the earlier CSP structures is mainly focus on the fundamental mode characteristics with only single resonance frequency. Here we propose a innovative dual inverted-L structure with excellent performance not only on the fundamental mode but also on a new upper mode. This structure operates in microwave frequencies regime and shows outstanding frequency tunability characteristic. Being different from frequency characteristics in the earlier CSP waveguides which always used to be designed single-frequency device, dual-frequency tunability can be obtained via the dual L-type bending branch of the periodical CSP structure. In present paper, we also realize a tunable dual-frequency filter by changing the scaling factor of inverted-L stubs.

Mosfet-C Transimpedance Filters with Center Frequency Tunability Feature

2022 ◽  
Author(s):  
Bilgin Metin ◽  
Yasin Basaran ◽  
Norbert Herencsar ◽  
Mohammad Faseehuddin ◽  
Oguzhan Cicekoglu
Keyword(s):  
Center Frequency ◽  
Frequency Tunability

Double Channel Phase-coded Microwave Signal System with Frequency Tunability

2019 ◽  
Vol 48 (10) ◽  
pp. 1006001
Author(s):  
韩一石 HAN Yi-shi ◽  
谢胜超 XIE Sheng-chao ◽  
付晨远 FU Chen-yuan ◽  
赵蓓丝 ZHAO Bei-si ◽  
雷珂珂 LEI Ke-ke
Keyword(s):  
Microwave Signal ◽  
Signal System ◽  
Frequency Tunability ◽  
Double Channel

scholarly journals Multifrequency Driven Nematics

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 275 ◽  
Author(s):  
Noureddine Bennis ◽  
Jakub Herman ◽  
Aleksandra Kalbarczyk ◽  
Przemysław Kula ◽  
Leszek R. Jaroszewicz
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Electric Fields ◽  
Dielectric Anisotropy ◽  
Dielectric Measurements ◽  
Frequency Tunability ◽  
Frequency Tunable ◽  
Electrooptical Properties ◽  
Crystal Characterization

Liquid crystals act on the amplitude and the phase of a wave front under applied electric fields. Ordinary LCs are known as field induced birefringence, thus both phase and amplitude modulation strongly depend on the voltage controllable molecular tilt. In this work we present electrooptical properties of novel liquid crystal (LC) mixture with frequency tunable capabilities from 100Hz to 10 KHz at constant applied voltage. The frequency tunability of presented mixtures shown here came from composition of three different families of rodlike liquid crystals. Dielectric measurements are reported for the compounds constituting frequency-controlled birefringence liquid crystal. Characterization protocols allowing the optimum classification of different components of this mixture, paying attention to all relevant parameters such as anisotropic polarizability, dielectric anisotropy, and dipole moment are presented.

Stability Analysis of Spin-Torque Nano-oscillator in the Rotating Frame

SPIN ◽  
2019 ◽  
Vol 09 (03) ◽  
pp. 1950008
Author(s):  
HaoHsuan Chen ◽  
Lang Zeng ◽  
ChingMing Lee ◽  
Weisheng Zhao
Keyword(s):  
High Performance ◽  
Electrical Current ◽  
Nonstationary Process ◽  
Laboratory Frame ◽  
Spin Torque ◽  
Rotating Frame ◽  
Magnetization Dynamics ◽  
Applied Current ◽  
Frequency Tunability ◽  
Out Of Plane

Spin-torque nano-oscillators (STNOs) have become one of the emerging and novel microwave devices with the high performance and tunability of GHz range frequency. The nanopillar structure with an out-of-plane (OP) spin polarizer and an in-plane (IP) magnetized free layer (FL) has been considered as a good candidate for the STNOs. Using the local rotational coordinate transformation, a nonstationary process describing magnetization dynamics in the laboratory frame is therefore transformed into a stationary one in the rotating frame. In this way, the state phase diagram of this type of STNOs is well established as a function of an applied current and external field, which is also evidenced by the macrospin simulations. Also, we show that the frequency tunability of the STNOs through electrical current can be well elevated by applying a static magnetic field anti-parallel to the spin-polarizer vector.

Frequency tunability of three-mirror waveguide resonators

1986 ◽  
Vol 25 (13) ◽  
pp. 2188
Author(s):  
Christopher A. Hill ◽  
Denis R. Hall
Keyword(s):  
Frequency Tunability ◽  
Waveguide Resonators
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