Spatial beam quality analysis of mid-wave infrared quantum cascade lasers

In this paper, we present WaterSpy, a project developing an innovative, compact, cost-effective photonic device for pervasive water quality sensing, operating in the mid-IR spectral range. The approach combines the use of advanced Quantum Cascade Lasers (QCLs) employing the Vernier effect, used as light source, with novel, fibre-coupled, fast and sensitive Higher Operation Temperature (HOT) photodetectors, used as sensors. These will be complemented by optimised laser driving and detector electronics, laser modulation and signal conditioning technologies. The paper presents the WaterSpy concept, the requirements elicited, the preliminary architecture design of the device, the use cases in which it will be validated, while highlighting the innovative technologies that contribute to the advancement of the current state of the art.

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High-beam quality quantum cascade lasers for high-power applications

Technologies for Optical Countermeasures XVII; and High-Power Lasers: Technology and Systems, Platforms, Effects IV ◽

10.1117/12.2570822 ◽

2020 ◽

Author(s):

Mathieu Carras

Keyword(s):

High Power ◽

Quantum Cascade Lasers ◽

Beam Quality ◽

High Beam ◽

Quantum Cascade ◽

Cascade Lasers ◽

High Beam Quality

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PbTe/PbS Multilayer Mirror for EuTe/PbTe Surface Emitting Quantum Cascade Lasers

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.129.799 ◽

2009 ◽

Vol 129 (11) ◽

pp. 799-801

Author(s):

Daoshe Cao ◽

Taiki Yamano ◽

Yoku Inoue ◽

Akihiro Ishida

Keyword(s):

Quantum Cascade Lasers ◽

Quantum Cascade ◽

Multilayer Mirror ◽

Cascade Lasers

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Beam Pattern Investigation of Terahertz Quantum Cascade Lasers

PIERS Online ◽

10.2529/piers070905092309 ◽

2008 ◽

Vol 4 (2) ◽

pp. 267-270 ◽

Cited By ~ 4

Author(s):

Saeed Fathololoumi ◽

Dayan Ban ◽

Hui Luo ◽

Peter Grant ◽

Sylvain R. Laframboise ◽

...

Keyword(s):

Quantum Cascade Lasers ◽

Beam Pattern ◽

Quantum Cascade ◽

Cascade Lasers

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Electromagnetic-matter interactions and devices

10.1093/oso/9780198759874.003.0006 ◽

2017 ◽

Author(s):

Sandip Tiwari

Keyword(s):

Optical Tweezers ◽

Quantum Cascade Lasers ◽

Accelerator Physics ◽

X Ray ◽

Quantum Cascade ◽

Inorganic Systems ◽

Charge Cloud ◽

Atomic Distance ◽

Extinction Length ◽

Cascade Lasers

This chapter explores electromagnetic-matter interactions from photon to extinction length scales, i.e., nanometer of X-ray and above. Starting with Casimir-Polder effect to understand interactions of metals and dielectrics at near-atomic distance scale, it stretches to larger wavelengths to explore optomechanics and its ability for energy exchange and signal transduction between PHz and GHz. This range is explored with near-quantum sensitivity limits. The chapter also develops the understanding phononic bandgaps, and for photons, it explores the use of energetic coupling for useful devices such as optical tweezers, confocal microscopes and atomic clocks. It also explores miniature accelerators as a frontier area in accelerator physics. Plasmonics—the electromagnetic interaction with electron charge cloud—is explored for propagating and confined conditions together with the approaches’ possible uses. Optoelectronic energy conversion is analyzed in organic and inorganic systems, with their underlying interaction physics through solar cells and its thermodynamic limit, and quantum cascade lasers.

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