Open-path multi-species remote sensing with a broadband optical parametric oscillator

Kara, Oguzhan; Sweeney, Frazer; Rutkauskas, Marius; Farrell, Carl; Leburn, C.G.; Reid, Derryck T.

doi:10.1364/oe.27.021358

Cited by 32 publications

(14 citation statements)

References 23 publications

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“…The technique that has so far been most successfully used for broadband open path sensing is near and mid-infrared dual-comb spectroscopy (DCS) using both laboratory-based and field deployed platforms based on Er-doped fiber combs and difference frequency generation sources [10][11][12][13]. Open path sensing in the mid-infrared was also demonstrated using femtosecond optical parametric oscillator in combination with a VIPA spectrometer [14] or a Fourier transform spectrometer [15,16]. However, a field-deployed platform for broadband in situ sensing has only been demonstrated in the UV range using a system based on a frequency-doubled femtosecond Ti:Sapphire laser, an enhancement cavity, and low-resolution compact spectrograph [17,18].…”

Section: Introductionmentioning

confidence: 99%

Compact mode-locked Er-doped fiber laser for broadband cavity-enhanced spectroscopy

et al. 2020

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We report the design and characteristics of a simple and compact mode-locked Er-doped fiber laser and its application to broadband cavity-enhanced spectroscopy. The graphene mode-locked polarization maintaining oscillator consumes less than 5 W of power. It is thermally stabilized, enclosed in a 3D printed box, and equipped with three actuators that control the repetition rate: fast and slow fiber stretchers, and metal-coated fiber section. This allows wide tuning of the repetition rate and its stabilization to an external reference source. The applicability of the laser to molecular spectroscopy is demonstrated by detecting CO 2 in air using continuous-filtering Vernier spectroscopy with absorption sensitivity of 5.5 × 10 −8 cm −1 in 50 ms.

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Section: Introductionmentioning

confidence: 99%

Compact mode-locked Er-doped fiber laser for broadband cavity-enhanced spectroscopy

et al. 2020

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“…It could be used as a field‐deployable compact spectrometer. Finally, the high‐speed FTIR spectrometer will become a powerful tool for various analytical applications such as liquid/particle flow measurements, [ 11,12 ] gaseous combustion measurements, [ 13,14 ] large‐area remote sensing, [ 39,40 ] photoacoustic sensing, [ 41 ] and real‐time chemical reaction monitoring. [ 42 ]…”

Section: Resultsmentioning

confidence: 99%

High‐Speed Fourier‐Transform Infrared Spectroscopy with Phase‐Controlled Delay Line

Hashimoto

Badarla

Ideguchi

2020

Laser & Photonics Reviews

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Fourier-transform infrared spectroscopy (FTIR) is the golden standard of mid-infrared (MIR) molecular spectroscopic analysis through optically-encoded vibrational signatures. Michelson-type FTIR and MIR dualcomb spectrometers allow us to simultaneously investigate multiple molecular species via the broadband and high-resolution spectroscopic capabilities. However, these are not applicable to high-speed measurements due to the low temporal resolution which is fundamentally limited by the signal-to-noise ratio (SNR). In this study, we develop a high-speed FTIR spectroscopy technique called phase-controlled Fourier-transform infrared spectroscopy (PC-FTIR) that has the capability to measure MIR absorption spectra at a rate of above 10 kHz. PC-FTIR demonstrates the high scan rate with a high SNR for various spectral bandwidths by arbitrarilyadjusting the instrumental spectral resolution. As a proof of principle demonstration, we measure high-speed mixing dynamics of two liquids at a rate of 24 kHz. We also measure MIR spectra of gas-phase molecules with higher spectral resolution at a rate of 12 kHz. This high-speed MIR spectrometer could be especially useful for measuring non-repetitive fast phenomena and acquiring a large amount spectral data within a short time.

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“…Progress in tunable solid-state laser technology have bridged the gap between these two approaches [38,39]. DIAL has been recently extended to multi-species measurements by using tunable broadband optical parametric oscillators [40,41]. A summary about representative DIAL detections is shown in Table 1 with the different species, the wavelength used and the detection capacities.…”

Section: Differential Absorption Lidar (Dial)mentioning

confidence: 99%

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

et al. 2020

Remote Sensing

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Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety. Laser absorption spectroscopy (LAS) is a highly desirable technology, benefiting from high measurement sensitivity, improved spectral selectivity or resolution, fast response and capability of good spatial resolution, multi-species and standoff detection with a non-cooperative target. Numerous LAS-based standoff detection techniques have seen rapid development recently and are reviewed herein, including differential absorption LiDAR, tunable laser absorption spectroscopy, laser photoacoustic spectroscopy, dual comb spectroscopy, laser heterodyne radiometry and active coherent laser absorption spectroscopy. An update of the current status of these various methods is presented, covering their principles, system compositions, features, developments and applications for standoff chemical detection over the last decade. In addition, a performance comparison together with the challenges and opportunities analysis is presented that describes the broad LAS-based techniques within the framework of remote sensing research and their directions of development for meeting potential practical use.

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Open-path multi-species remote sensing with a broadband optical parametric oscillator

Cited by 32 publications

References 23 publications

Compact mode-locked Er-doped fiber laser for broadband cavity-enhanced spectroscopy

Compact mode-locked Er-doped fiber laser for broadband cavity-enhanced spectroscopy

High‐Speed Fourier‐Transform Infrared Spectroscopy with Phase‐Controlled Delay Line

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

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