scholarly journals Optical Wireless Link Operated at the Wavelength of 4.0 µm with Commercially Available Interband Cascade Laser

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4102
Author(s):  
Janusz Mikołajczyk ◽  
Robert Weih ◽  
Marcin Motyka
Keyword(s):  
Room Temperature ◽  
Infrared Range ◽  
Noise Power ◽  
System Construction ◽  
Optical Wireless ◽  
Data Link ◽  
Spectral Window ◽  
Interband Cascade Laser ◽  
Modulation Rate ◽  
Outstanding Result

This paper evaluates the key factors influencing the design of optical wireless communication (OWC) systems operating in the mid-infrared range. The performed analysis has shown that working in this spectral “window”, compared to other wavelengths, is more effective in reducing the attenuation of radiation. The main goal was to verify the capabilities of the “on-shelf” interband cascade (IC) laser in the context of OWC system construction, considering its output power, modulation rate, room temperature operation, and integrated structure. For this purpose, a lab model of a data link with IC laser has been developed. Based on its main parameters, the estimation of signal-to-noise power ratio versus data link range was made. That range was about 2 km for a case of low scintillation and relatively low visibility. In the experimental part of the work, the obtained modulation rate was 70 MHz for NRZ (non-return-to-zero) format coding. It is an outstanding result taking into consideration IC laser operated at room temperature.

scholarly journals Data Link with a High-Power Pulsed Quantum Cascade Laser Operating at the Wavelength of 4.5 µm

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3231
Author(s):  
Janusz Mikołajczyk
Keyword(s):  
High Power ◽  
Continuous Wave ◽  
Data Transfer ◽  
Quantum Cascade Lasers ◽  
Infrared Range ◽  
Noise Power ◽  
Data Link ◽  
Light Power ◽  
Transmitted Beam ◽  
Quantum Cascade

This article is a short study of the application of high-power quantum cascade lasers and photodetectors in medium-infrared optical wireless communications (OWC). The link range is mainly determined by the transmitted beam parameters and the performance of the light sensor. The light power and the photodetector noise directly determine the signal-to-noise power ratio. This ratio could be maximized in the case of minimizing the radiation losses caused by atmospheric attenuation. It can be obtained by applying both radiation sources and sensors operated in the medium infrared range decreasing the effects of absorption, scattering or scintillation, beam spreading, and beam wandering. The development of a new class of laser sources based on quantum cascade structures becomes a prospective alternative. Regarding the literature, there are descriptions of some preliminary research applying these lasers in data transmission. To provide a high data transfer rate, continuous wave (cw) lasers are commonly used. However, they are characterized by low power (a few tens of mWatts) limiting their link range. Also, only a few high-power pulsed lasers (a few hundreds of mWatts) were tested. Due to their limited pulse duty cycle, the obtained modulation bandwidth was lower than 1 MHz. The main goal of this study is to experimentally determine the capabilities of the currently developed state-of-the-art high-power pulsed quantum cascade (QC) lasers and photodetectors in OWC systems. Finally, the data link range using optical pulses of a QC laser of ~2 W, operated at the wavelength of ~4.5 µm, is discussed.

scholarly journals Compact CH4 sensor system based on a continuous-wave, low power consumption, room temperature interband cascade laser

2016 ◽  
Vol 108 (1) ◽  
pp. 011106 ◽  
Author(s):  
Lei Dong ◽  
Chunguang Li ◽  
Nancy P. Sanchez ◽  
Aleksander K. Gluszek ◽  
Robert J. Griffin ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Room Temperature ◽  
Continuous Wave ◽  
Sensor System ◽  
Low Power Consumption ◽  
Interband Cascade Laser

scholarly journals Sub-ppb-level CH4 detection by exploiting a low-noise differential photoacoustic resonator with a room-temperature interband cascade laser

2020 ◽  
Vol 28 (13) ◽  
pp. 19446 ◽  
Author(s):  
Huadan Zheng ◽  
Yihua Liu ◽  
Haoyang Lin ◽  
Ruifeng Kan ◽  
Pietro Patimisco ◽  
...  
Keyword(s):  
Room Temperature ◽  
Low Noise ◽  
Interband Cascade Laser

scholarly journals Tunable exciton-polaritons emerging from WS2 monolayer excitons in a photonic lattice at room temperature

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
L. Lackner ◽  
M. Dusel ◽  
O. A. Egorov ◽  
B. Han ◽  
H. Knopf ◽  
...  
Keyword(s):  
Room Temperature ◽  
Optical Cavity ◽  
Research Strategy ◽  
Central Research ◽  
Ambient Conditions ◽  
Spectral Window ◽  
Strongly Coupled ◽  
Experimental Implementation ◽  
Exciton Polaritons ◽  
Non Linear

AbstractEngineering non-linear hybrid light-matter states in tailored lattices is a central research strategy for the simulation of complex Hamiltonians. Excitons in atomically thin crystals are an ideal active medium for such purposes, since they couple strongly with light and bear the potential to harness giant non-linearities and interactions while presenting a simple sample-processing and room temperature operability. We demonstrate lattice polaritons, based on an open, high-quality optical cavity, with an imprinted photonic lattice strongly coupled to excitons in a WS2 monolayer. We experimentally observe the emergence of the canonical band-structure of particles in a one-dimensional lattice at room temperature, and demonstrate frequency reconfigurability over a spectral window exceeding 85 meV, as well as the systematic variation of the nearest-neighbour coupling, reflected by a tunability in the bandwidth of the p-band polaritons by 7 meV. The technology presented in this work is a critical demonstration towards reconfigurable photonic emulators operated with non-linear photonic fluids, offering a simple experimental implementation and working at ambient conditions.

scholarly journals 245 MHz bandwidth organic light-emitting diodes used in a gigabit optical wireless data link

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Kou Yoshida ◽  
Pavlos P. Manousiadis ◽  
Rui Bian ◽  
Zhe Chen ◽  
Caroline Murawski ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Optical Wireless ◽  
Wireless Data ◽  
Data Link ◽  
Light Emitting ◽  
Organic Light

scholarly journals Dynamically Temperature-Voltage Controlled Multifunctional Device Based on VO2 and Graphene Hybrid Metamaterials: Perfect Absorber and Highly Efficient Polarization Converter

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1101 ◽  
Author(s):  
Min Mao ◽  
Yaoyao Liang ◽  
Ruisheng Liang ◽  
Lin Zhao ◽  
Ning Xu ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Room Temperature ◽  
Polarization State ◽  
Spatial Light Modulators ◽  
Infrared Range ◽  
Temperature Phase ◽  
Perfect Absorber ◽  
Broadband Absorber ◽  
Novel Device ◽  
Multifunctional Device

Vanadium dioxide (VO2) is a temperature phase change material that has metallic properties at high temperatures and insulation properties at room temperature. In this article, a novel device has been designed based on the dielectric metasurface consisting of VO2 and graphene array, which can achieve multiple functions by adjusting temperature and voltage. When the temperature is high (340 K), the device is in the absorption state and its absorptivity can be dynamically controlled by changing the temperature. On the other hand, the device is in the polarization state under room temperature, and the polarization of electromagnetic waves can be dynamically controlled by adjusting the voltage of graphene. This device can achieve a broadband absorber (the maximum absorptance reaches 99.415% at wavelengths ranging from 44 THz to 52 THz) and high polarization conversion efficiency (>99.89%) in the mid-infrared range, which has great advantages over other single-function devices. Our results demonstrate that this multifunctional device may have widespread applications in emitters, sensors, spatial light modulators, IR camouflages, and can be used in thermophotovoltaics and wireless communication.

scholarly journals Ppb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass gas cell

2015 ◽  
Vol 23 (15) ◽  
pp. 19821 ◽  
Author(s):  
Lei Dong ◽  
Yajun Yu ◽  
Chunguang Li ◽  
Stephen So ◽  
Frank K. Tittel
Keyword(s):  
Room Temperature ◽  
Gas Cell ◽  
Interband Cascade Laser ◽  
Dense Pattern

Electron Beam Induced Two-State Noise in Carbon Nanotubes

2009 ◽  
Vol 1204 ◽  
Author(s):  
Jack Chan ◽  
Brian G. Burke ◽  
Chong Hu ◽  
Joe Campbell ◽  
Lloyd Harriott ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electron Beam ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Noise Power ◽  
Beam Irradiation ◽  
Noise Power Spectral Density ◽  
Power Spectral

AbstractDiscrete current switching is induced in carbon nanotubes by electron beam irradiation. Switching amplitudes of 3% to 6% are observed at room temperature. Switching is created by electron beam exposure with dosage as low as 1000 pC/cm. Relative switching amplitude remains constant as the bias voltage varies, suggesting that current fluctuation is dominated by mobility fluctuation. Changes in the noise power spectral density following electron beam exposure will be discussed.

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