Laser feedback interferometry: a tutorial on the self-mixing effect for coherent sensing

T Taimre, M Nikolić, K Bertling, YL Lim… - Advances in Optics …, 2015 - opg.optica.org
This tutorial presents a guided tour of laser feedback interferometry, from its origin and early
development through its implementation to a slew of sensing applications, including …

Terahertz imaging using quantum cascade lasers—a review of systems and applications

P Dean, A Valavanis, J Keeley, K Bertling… - Journal of Physics D …, 2014 - iopscience.iop.org
The terahertz (THz) frequency quantum cascade laser (QCL) is a compact source of THz
radiation offering high power, high spectral purity and moderate tunability. As such, these …

[HTML][HTML] Sensing and imaging using laser feedback interferometry with quantum cascade lasers

AD Rakić, T Taimre, K Bertling, YL Lim, P Dean… - Applied Physics …, 2019 - pubs.aip.org
Quantum cascade lasers (QCLs) are high-power sources of coherent radiation in the
midinfrared and terahertz (THz) bands. Laser feedback interferometry (LFI) is one of the …

Self‐induced phase locking of terahertz frequency combs in a phase‐sensitive hyperspectral near‐field nanoscope

V Pistore, EAA Pogna, L Viti, L Li, AG Davies… - Advanced …, 2022 - Wiley Online Library
Chip‐scale, electrically‐pumped terahertz (THz) frequency‐combs (FCs) rely on nonlinear
four‐wave‐mixing processes, and have a nontrivial phase relationship between the evenly …

High-power terahertz quantum cascade lasers with∼ 0.23 W in continuous wave mode

X Wang, C Shen, T Jiang, Z Zhan, Q Deng, W Li, W Wu… - Aip Advances, 2016 - pubs.aip.org
Terahertz quantum cascade lasers with a record output power up to∼ 0.23 W in continuous
wave mode were obtained. We show that the optimal 2.9-mm-long device operating at 3.11 …

[HTML][HTML] On-chip, self-detected terahertz dual-comb source

M Rösch, G Scalari, G Villares, L Bosco, M Beck… - Applied Physics …, 2016 - pubs.aip.org
We present a directly generated on-chip dual-comb source at terahertz (THz) frequencies.
The multi-heterodyne beating signal of two free-running THz quantum cascade laser …

Comparison of physical and system factors impacting hydration sensing in leaves using terahertz time-domain and quantum cascade laser feedback interferometry …

K Singh, A Bandyopadhyay, K Bertling, YL Lim… - Sensors, 2023 - mdpi.com
To reduce the water footprint in agriculture, the recent push toward precision irrigation
management has initiated a sharp rise in photonics-based hydration sensing in plants in a …

Terahertz imaging of human skin pathologies using laser feedback interferometry with quantum cascade lasers

X Qi, K Bertling, MS Stark, T Taimre, YC Kao… - Biomedical Optics …, 2023 - opg.optica.org
Early detection of skin pathologies with current clinical diagnostic tools is challenging,
particularly when there are no visible colour changes or morphological cues present on the …

Imaging elastic waves in solids: how to use laser feedback interferometry to visualize them

K Bertling, M Veidt, J Perchoux, AD Rakić - Optics Express, 2023 - opg.optica.org
The use of ultrasonic elastic waves is a well established technique for non-destructive
testing of materials and structures, in particular to exploit the interaction of waves with …

[HTML][HTML] Coherent terahertz microscopy of modal field distributions in micro-resonators

N Sulollari, J Keeley, SJ Park, P Rubino, AD Burnett… - APL Photonics, 2021 - pubs.aip.org
Near-field microscopy techniques operating in the terahertz (THz) frequency band offer the
tantalizing possibility of visualizing with nanometric resolution the localized THz fields …