Coherent terahertz laser feedback interferometry for hydration sensing in leaves

M Kashyap, J Torniainen, K Bertling, U Kundu… - Optics …, 2023 - opg.optica.org
The response of terahertz to the presence of water content makes it an ideal analytical tool
for hydration monitoring in agricultural applications. This study reports on the feasibility of …

Feedback regimes of lfi sensors: Experimental investigations

K Bertling, X Qi, T Taimre, YL Lim, AD Rakić - Sensors, 2022 - mdpi.com
In this article, we revisit the concept of optical feedback regimes in diode lasers and explore
each regime experimentally from a somewhat unconventional point of view by relating the …

[HTML][HTML] Frequency combs induced by optical feedback and harmonic order tunability in quantum cascade lasers

C Silvestri, X Qi, T Taimre, AD Rakić - APL Photonics, 2023 - pubs.aip.org
This study investigates the interaction between frequency combs and optical feedback
effects in Quantum Cascade Lasers (QCLs). The theoretical analysis reveals new …

Improved two-mode dynamic model for external-cavity quantum cascade lasers under strong optical feedback

HR Yousefvand - Physica Scripta, 2023 - iopscience.iop.org
In this paper, we propose an improved model for describing the dynamical behavior and
mode selection mechanism of an external-cavity quantum-cascade laser (EC-QCL) when …

Detecting Genetic Variation in Plants by Mapping Cell Water Dynamics with Terahertz Laser Feedback Interferometry

U Kundu, J Torniainen, K Bertling… - IEEE Transactions …, 2024 - ieeexplore.ieee.org
This study investigated the use of terahertz (THz) imaging as a rapid, high-fidelity technique
for discriminating between genetic variants of the Allium genus based on cellular water …

Variability in plant cell water dynamics as a genetic discriminatory method using terahertz quantum cascade laser-based laser feedback interferometry

U Kundu, J Torniainen, K Bertling… - … in Plant and …, 2024 - spiedigitallibrary.org
In this article, we report our work on the development of a non-invasive, rapid, robust, and
high-fidelity technique that can be used to discriminate between genetic variants. Our study …

Self-Pulsations in Terahertz Quantum Cascade Lasers under Strong Optical Feedback: The Effect of Multiple Reflections in the External Cavity

X Qi, HY Loh, T Taimre, K Bertling, D Indjin, AD Rakić - Sensors, 2022 - mdpi.com
We have recently reported the self-pulsation phenomenon under strong optical feedback in
terahertz (THz) quantum cascade lasers (QCLs). One important issue, however, we left …

Detectorless 3D terahertz imaging: achieving subwavelength resolution with reflectance confocal interferometric microscopy

J Silva, M Plöschner, K Bertling, M Ghantala… - arXiv preprint arXiv …, 2024 - arxiv.org
Terahertz imaging holds great potential for non-destructive material inspection, but practical
implementation has been limited by resolution constraints. In this study, we present a novel …

[引用][C] Terahertz spectroscopy and imaging in quantitative assessment of plant hydration towards implementing optimized irrigation management in Australia and India

M Kashyap - 2024 - espace.library.uq.edu.au
Precision agriculture and smart irrigation techniques have gained prominence in recent
years to address the challenge of maximizing agricultural productivity with limited resources …