University of Illinois Urbana-Champaign

Mid-infrared Cw Optical Parametric Oscillator Pumped By An Electro-optic Frequency Comb

Cich, Matthew J.

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WJ06_1.pptx
6309.pdf

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https://hdl.handle.net/2142/116772

Description

Title
Mid-infrared Cw Optical Parametric Oscillator Pumped By An Electro-optic Frequency Comb
Author(s)
Cich, Matthew J.
Contributor(s)
  • Long, David A.
  • Haimberger, Chris
  • Hurlbut, Walter
  • Foote, David B.
  • Heiniger, Adam
Issue Date
2022-06-22
Keyword(s)
Instrument/Technique Demonstration
Abstract
\begin{wrapfigure}{l}{0pt} \includegraphics[scale=0.25]{CombSpectrum.eps} \end{wrapfigure} Optical frequency comb (OFC) spectroscopy in the mid-infrared (MIR) promises faster, more precise, and more sensitive molecular spectroscopy. To date, demonstrations of MIR OFCs have suffered from low power, poor wavelength coverage, or low sensitivity. Systems that do excel in these areas have high cost and complexity. The technique and measurements reported here demonstrate that singly resonant, single frequency optical parametric oscillators (OPO’s) are a powerful platform for generating MIR OFC’s with properties not shown by other MIR light sources. An EOM frequency comb is first generated via phase modulation of CW light near 1064 nm. An inexpensive direct digital synthesizer (DDS)-based scheme is used to generate chirped modulation resulting in a ~2 GHz-wide frequency comb with ultraflat comb teeth and frequency agile repetition rates between 1 MHz and 10 MHz. This comb pumps the OPO, resulting in an idler output that is a MIR OFC tunable between 2200 - 4000 nm with $>$1 W output power (figure). This technique is utilized to perform frequency comb spectroscopy on select rovibrational features near 3 $\mu$m in methane and acetylene.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116772
DOI
https://doi.org/10.15278/isms.2022.WJ06
Copyright and License Information
Copyright 2022 held by the authors

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Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY