Mid-infrared supercontinuum covering the 1.4–13.3 μm molecular fingerprint region using ultra-high NA chalcogenide step-index fibre

2014 ◽  
Vol 8 (11) ◽  
pp. 830-834 ◽  
Author(s):  
Christian Rosenberg Petersen ◽  
Uffe Møller ◽  
Irnis Kubat ◽  
Binbin Zhou ◽  
Sune Dupont ◽  
...  
Keyword(s):  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Step Index ◽  
Index Fibre ◽  
Fingerprint Region

Precision Mid-Infrared Frequency Comb Spectroscopy using a Cross-Dispersed Spectrometer

2021 ◽  
Author(s):  
D. Michelle Bailey ◽  
Gang Zhao ◽  
Adam J. Fleisher
Keyword(s):  
Frequency Comb ◽  
Difference Frequency Generation ◽  
Laser Frequency ◽  
Trace Gas ◽  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Optical Frequency Combs ◽  
Frequency Combs ◽  
Infrared Spectral ◽  
Fingerprint Region

<p>Advances in optical technology have led to the commercialization and widespread use of broadband optical frequency combs for multiplexed measurements of trace-gas species. Increasingly available in the mid-infrared spectral region, these devices can be leveraged to interrogate the molecular fingerprint region where many fundamental rovibrational transitions occur. Here we present a cross-dispersed spectrometer employing a virtually imaged phased array etalon and ruled diffraction grating coupled with a difference frequency generation comb centered near 4.5 µm. The spectrometer achieves sub-GHz spectral resolution with a 30 cm<sup>-1</sup> instantaneous bandwidth. Laboratory results for nitrous oxide isotopic abundance retrieval will be presented. Challenges relating to characterizing the instrument lineshape function, constructing a frequency axis traceable to the comb, and accurate spectral modelling will be addressed and progress towards incorporating a more compact laser frequency comb source into the system will be discussed.</p>

scholarly journals 2-10 µm Mid-Infrared All-Fiber Supercontinuum Laser Source: Experiment and Simulation

2021 ◽  
Author(s):  
Thibaut Sylvestre
Keyword(s):  
Pulse Propagation ◽  
Molecular Spectroscopy ◽  
Laser Source ◽  
Physical Processes ◽  
Fiber System ◽  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Wide Range ◽  
Pulsed Fiber Laser ◽  
Fingerprint Region

Mid-infrared supercontinuum (SC) sources in the 2 to 20 µm molecular fingerprint region are in high demand for a wide range of applications including optical coherence tomography, remote sensing, molecular spectroscopy, and hyperspectral imaging. In this work, we investigate mid-IR SC generation in a cascaded silica-ZBLAN-chalcogenide fiber system directly pumped with a commercially available 460-ps pulsed fiber laser operating in the telecommunications window at 1.55 µm. This all-fiber system is shown to generate a flat broadband mid-IR SC covering the entire range from 2 to 10 µm with severaltens of mWof output power. This technique paves the way for cheaper, practical, and robust broadband SC sources in the mid-IR without the requirement of mid-infrared pump sources or Thulium-dopedfiber amplifiers. We also describe a fully realistic numerical model used to simulate the nonlinear pulse propagation through the cascaded fiber system and we use our numerical results to discuss the physical processes underlying the spectral broadening in the cascaded system. We conclude with recommendations to optimize the current cascaded systems based on our simulation results.

Multi-Channel Harmonic Frequency Comb Covering the Mid-Infrared Molecular Fingerprint Region

2018 ◽  
Author(s):  
Christian Gaida ◽  
Tobias Heuermann ◽  
Martin Gebhardt ◽  
Thomas Butler ◽  
Daniel Gerz ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Harmonic Frequency ◽  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Fingerprint Region

Broadband mid-infrared time-domain spectrometer for the molecular fingerprint region

2016 ◽  
Author(s):  
W. Schweinberger ◽  
L. Vamos ◽  
M. Huber ◽  
J. Zhang ◽  
M. Trubetskov ◽  
...  
Keyword(s):  
Time Domain ◽  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Fingerprint Region

Visible to mid-infrared supercontinuum generated in novel GeS2–Ga2S3–CsI step-index fibre

2019 ◽  
Vol 66 (11) ◽  
pp. 1190-1196 ◽  
Author(s):  
Wenyong Wei ◽  
Xuefeng Peng ◽  
Shixun Dai ◽  
Yingying Wang ◽  
Min Xie ◽  
...  
Keyword(s):  
Mid Infrared ◽  
Step Index ◽  
Index Fibre

HARMONIC FREQUENCY COMB COVERING THE MID-INFRARED MOLECULAR FINGERPRINT REGION

2018 ◽  
Author(s):  
Ioachim Pupeza ◽  
Jens Limpert ◽  
Ferenc Krausz ◽  
Lenard Vamos ◽  
Christina Hofer ◽  
...  
Keyword(s):  
Frequency Comb ◽  
Harmonic Frequency ◽  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Fingerprint Region

Local field in a bent step index fibre

1988 ◽  
Vol 24 (6) ◽  
pp. 332 ◽  
Author(s):  
Y.H. Cheng ◽  
W.G. Lin
Keyword(s):  
Local Field ◽  
Step Index ◽  
Index Fibre

Erratum: Local field in a bent step index fibre

1989 ◽  
Vol 25 (7) ◽  
pp. 486
Author(s):  
Y.H. Cheng ◽  
W.G. Lin
Keyword(s):  
Local Field ◽  
Step Index ◽  
Index Fibre
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