Measurement of atmospheric oxygen using long-path supercontinuum absorption spectroscopy

Brown, David M.; Brown, Andrea M.; Edwards, Perry S.; Liu, Zhiwen; Philbrick, C. Russell

doi:10.1117/1.jrs.8.083557

Cited by 21 publications

(9 citation statements)

References 25 publications

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“…High power medium infrared fiber laser has important applications in frontier scientific research, biomedical, environmental monitoring, infrared remote sensing, infrared imaging, atmospheric communication, photoelectric countermeasures, and many other fields [229][230][231][232][233][234][235]. The medium infrared fiber laser material is the core component of the medium infrared fiber laser.…”

Section: Lasermentioning

confidence: 99%

Mid-Infrared Optoelectronic Devices Based on Two-Dimensional Materials beyond Graphene: Status and Trends

et al. 2022

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Since atomically thin two-dimensional (2D) graphene was successfully synthesized in 2004, it has garnered considerable interest due to its advanced properties. However, the weak optical absorption and zero bandgap strictly limit its further development in optoelectronic applications. In this regard, other 2D materials, including black phosphorus (BP), transition metal dichalcogenides (TMDCs), 2D Te nanoflakes, and so forth, possess advantage properties, such as tunable bandgap, high carrier mobility, ultra-broadband optical absorption, and response, enable 2D materials to hold great potential for next-generation optoelectronic devices, in particular, mid-infrared (MIR) band, which has attracted much attention due to its intensive applications, such as target acquisition, remote sensing, optical communication, and night vision. Motivated by this, this article will focus on the recent progress of semiconducting 2D materials in MIR optoelectronic devices that present a suitable category of 2D materials for light emission devices, modulators, and photodetectors in the MIR band. The challenges encountered and prospects are summarized at the end. We believe that milestone investigations of 2D materials beyond graphene-based MIR optoelectronic devices will emerge soon, and their positive contribution to the nano device commercialization is highly expected.

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Section: Lasermentioning

confidence: 99%

Mid-Infrared Optoelectronic Devices Based on Two-Dimensional Materials beyond Graphene: Status and Trends

et al. 2022

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“…Fiber-based coherent mid-infrared (MIR) supercontinuum (SC) source has important applications in molecular spectroscopy, biomedicine, optical coherence tomography, remote sensing, national defense and security [1][2][3][4][5][6]. To generate MIR-SC, much attention has been paid to non-silica fibers such as tellurite, fluoride, and chalcogenide fibers with low transmission loss in MIR region [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of coherent mid-infrared supercontinuum generation based on carbon chloride core tapered photonic crystal fibers

Zhang,

Zhao,

et al. 2023

Laser Phys.

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We numerically studied coherent mid-infrared (MIR) supercontinuum (SC) generated by filling carbon chloride (CCl4, C2Cl4) into the tapered photonic crystal fiber (PCF). The mechanism involves nonlinear soliton compression, Raman soliton self-frequency shift and dispersive wave generated in a carbon chloride core tapered PCF pumped by a 1.98 μm femtosecond laser. Numerical solution of the generalized nonlinear Schrodinger equation shows that 1.15–5.5 μm (CCl4-core tapered PCF) and 1.15–5.7 μm (C2Cl4-core tapered PCF) coherent MIR-SC sources can be realized. Our results show that the above liquid-core tapered PCFs are promising nonlinear media for constructing broadband coherent MIR-SC light sources.

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“…Advances have also been made in detecting trace concentrations of chemical species from industrial and power generation air pollution, biogenic processes, and leaks of methane and other gasses from mining, well drilling, fracking, and from buried natural gas pipelines 14 . Tunable lasers, laser diodes, and broad band supercontinuum lasers have opened opportunities to make measurements atmospheric composition over a wide range of wavelengths [15][16][17][18] . These techniques allow measurements of trace level concentrations of chemical species using the unique spectral signatures resulting from optical scattering and absorption of molecules in gas, liquid, and solid phases.…”

Section: Introductionmentioning

confidence: 99%

Lidar investigations of atmospheric dynamics

Philbrick

Hallén

2015

SPIE Proceedings

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Ground based lidar techniques using Raleigh and Raman scattering, differential absorption (DIAL), and supercontinuum sources are capable of providing unique signatures to study dynamical processes in the lower atmosphere. The most useful profile signatures of dynamics in the lower atmosphere are available in profiles of time sequences of water vapor and aerosol optical extinction obtained with Raman and DIAL lidars. Water vapor profiles are used to study the scales and motions of daytime convection cells, residual layer bursts into the planetary boundary layer (PBL), variations in height of the PBL layer, cloud formation and dissipation, scale sizes of gravity waves, turbulent eddies, as well as to study the seldom observed phenomena of Brunt-Väisälä oscillations and undular bore waves. Aerosol optical extinction profiles from Raman lidar provide another tracer of dynamics and motion using sequential profiles atmospheric aerosol extinction, where the aerosol distribution is controlled by dynamic, thermodynamic, and photochemical processes. Raman lidar profiles of temperature describe the stability of the lower atmosphere and measure structure features. Rayleigh lidar can provide backscatter profiles of aerosols in the troposphere, and temperature profiles in the stratosphere and mesosphere, where large gravity waves, stratospheric clouds, and noctilucent clouds are observed. Examples of several dynamical features are selected to illustrate interesting processes observed with Raman lidar. Lidar experiments add to our understanding of physical processes that modify atmospheric structure, initiate turbulence and waves, and describe the relationships between energy sources, atmospheric stability parameters, and the observed dynamics.

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Measurement of atmospheric oxygen using long-path supercontinuum absorption spectroscopy

Cited by 21 publications

References 25 publications

Mid-Infrared Optoelectronic Devices Based on Two-Dimensional Materials beyond Graphene: Status and Trends

Mid-Infrared Optoelectronic Devices Based on Two-Dimensional Materials beyond Graphene: Status and Trends

Numerical simulation of coherent mid-infrared supercontinuum generation based on carbon chloride core tapered photonic crystal fibers

Lidar investigations of atmospheric dynamics

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