Recent trends in laser-based standoff detection of hazardous molecules

LM Narlagiri, MSS Bharati, R Beeram… - TrAC Trends in …, 2022 - Elsevier
We report here the recent developmental studies in the field of laser-based standoff
detection of hazardous molecules, including explosives. Continuous wave lasers to high …

Numerical evaluation of bidirectional high-speed data transmission over turbulence tolerable FSO link employing WDM-OAM multiplexing and DP-QPSK modulation …

B Dutta, B Kuiri, R Atta, N Sarkar, AS Patra - Optics Communications, 2023 - Elsevier
Orbital angular momentum (OAM) mode multiplexing is achieving utmost interest for the
enhancement of transmission capacity and spectral efficiency. We have reported a (2× 8× …

Propagation of THz radiation in air over a broad range of atmospheric temperature and humidity conditions

F Taleb, M Alfaro-Gomez, MD Al-Dabbagh, J Ornik… - Scientific Reports, 2023 - nature.com
As the need for higher data rates for communication increases, the terahertz (THz) band has
drawn considerable attention. This spectral region promises a much wider bandwidth and …

Quantum cascade laser based hybrid dual comb spectrometer

L Consolino, M Nafa, M De Regis, F Cappelli… - Communications …, 2020 - nature.com
Four-wave-mixing-based quantum cascade laser frequency combs (QCL-FC) are a powerful
photonic tool, driving a recent revolution in major molecular fingerprint regions, ie mid-and …

Gradient-reduced graphene oxide aerogel with ultrabroadband absorption from microwave to terahertz bands

X Sun, S Chen, C Kuang, W Fu, X Li… - ACS Applied Nano …, 2023 - ACS Publications
Ultrabroadband electromagnetic (EM) absorbers, especially those covering microwave to
terahertz (THz) bands, are urgently desired in multispectral applications such as 6G …

Modal coupling and crosstalk due to turbulence and divergence on free space THz links using multiple orbital angular momentum beams

Z Zhao, R Zhang, H Song, K Pang, A Almaiman… - Scientific Reports, 2021 - nature.com
Abstract Orbital-angular-momentum (OAM) multiplexing has been utilized to increase the
channel capacity in both millimeter-wave and optical domains. Terahertz (THz) wireless …

Terahertz nonlinear spectroscopy of water vapor

P Rasekh, A Safari, M Yildirim, R Bhardwaj… - Acs …, 2021 - ACS Publications
The water molecule has millions of rotational transitions in the infrared and terahertz region,
and the resulting absorption features dominate the transmission spectrum of atmospheric …

The impact of atmospheric turbulence on terahertz communication

L Cang, HK Zhao, GX Zheng - Ieee Access, 2019 - ieeexplore.ieee.org
The application prospect of terahertz (THz) has been vastly enriched because it has the
advantages of good penetrating power, high security, accurate directionality, and high …

On the performance of THz wireless LOS links through random turbulence channels

M Taherkhani, ZG Kashani… - Nano Communication …, 2020 - Elsevier
In this paper, a general channel model for THz wireless line-of-sight links is developed and
investigated. The propagation of THz waves is divided into two main scenarios, namely …

[HTML][HTML] 1600 Gbps PAM-4 FSO link enabled using OFCL-based WDM and OAM-multiplexing techniques

B Dutta, N Sarkar, R Atta, B Kuiri, AS Patra - Results in Optics, 2022 - Elsevier
The twisted light beams carry orbital angular momentum (OAM), which acts as additional
degrees of freedom. In this work, we have proposed a free space optics (FSO) …