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Computationally-enhanced molecular sensing using optical frequency combs

Descrizione del progetto

Un approccio praticabile basato su laser per il monitoraggio degli inquinanti organici nell’aria

L’inquinamento atmosferico costituisce una minaccia sempre più forte per le grandi città; tuttavia, il monitoraggio dei composti organici volatili e degli inquinanti organici persistenti mediante le tecnologie elettrochimiche o basate su laser si rivela impegnativo. Il progetto CEMoS-OFC, finanziato dal programma di azioni Marie Skłodowska-Curie, intende sviluppare una nuova classe di spettrometri laser a banda larga e ad alta risoluzione per il monitoraggio dell’aria a percorso aperto. Gli strumenti sfrutteranno un paio di sorgenti a pettine di frequenza ottica che operano nella regione del medio infrarosso, in cui i composti organici volatili e gli inquinanti organici persistenti manifestano le loro linee di assorbimento distintive. Avvalendosi di questo metodo di potenziamento del segnale computazionale in tempo reale ed eliminando la necessità di componenti elettronici complessi, il progetto spiana la strada a misurazioni pratiche di miscele di gas multispecie su canali a percorso aperto che si estendono per centinaia di metri.

Obiettivo

Air pollution is an increasingly important concern in larger cities and industrial areas. To date, much attention has been devoted to monitoring of particulate matter (PM), yet sensing of toxic or cancerogenic gas species formed i.e. in combustion of low-quality fuels is still challenging. The new National Emissions Ceilings (NEC) Directive (2016/2284/EU) has set commitments for member states on several important air pollutants, of which two groups: non-methane volatile organic compounds (NMVOCs), and persistent organic pollutants (POPs) are difficult to monitor using existing electrochemical or laser-based technologies to ensure sufficient sensitivity and selectivity. To address this need, the objective of this proposal is to develop a novel class of broadband and high-resolution laser spectrometers for open-path atmospheric monitoring. The instrument will exploit a pair od optical frequency comb (OFC) sources, which operate in the spectroscopically-relevant mid-infrared region where NMVOCs and POPs have their strongest and most unique absorption features. Unlike all prior attempts, this project aims to advance the field by enabling completely unstabilized operation of the sources using real-time computational signal enhancement referred to as Computationally Enhanced Molecular Sensing with Optical Frequency Combs (CEMOS-OFC). By generating two mutually coherent OFCs in a shared cavity, the need for complex phase synchronization electronics in dual-comb spectroscopy is eliminated, which paves the way for practical out-of-laboratory measurements of multi-species gas mixtures over open-path channels reaching hundreds of meters corresponding to part-per-million to parts-per-billion sensitivities. In addition to environmental gas sensing, spectroscopic analysis of simple algae and pharmaceuticals in the mid- to far-infrared region is also proposed.

Coordinatore

POLITECHNIKA WROCLAWSKA
Contribution nette de l'UE
€ 149 625,60
Indirizzo
WYBRZEZE WYSPIANSKIEGO 27
50-370 Wroclaw
Polonia

Mostra sulla mappa

Regione
Makroregion południowo-zachodni Dolnośląskie Miasto Wrocław
Tipo di attività
Higher or Secondary Education Establishments
Collegamenti
Costo totale
€ 149 625,60