The Influence of Free-Running FP- QCL Frequency Jitter on Cavity Ringdown Spectroscopy of C 60 Brian E. Brumfield* Jacob T. Stewart* Matt D. Escarra**

Slides:



Advertisements
Similar presentations
Development of an External Cavity Quantum Cascade Laser for High- Resolution Spectroscopy of Molecular Ions JACOB T. STEWART, BRADLEY M. GIBSON, BENJAMIN.
Advertisements

Brian Siller, Andrew Mills & Benjamin McCall University of Illinois at Urbana-Champaign.
Sub-Doppler Resolution Spectroscopy of the fundamental band of HCl with an Optical Frequency Comb ○ K. Iwakuni, M. Abe, and H. Sasada Department of Physics,
Gabriel M. P. Just, Patrick Rupper, Dmitry G. Melnik and Terry A. Miller EXPERIMENTAL PROGRESS FOR HIGH RESOLUTION CAVITY RINGDOWN SPECTROSCOPY OF JET-
Rotationally-resolved infrared spectroscopy of the polycyclic aromatic hydrocarbon pyrene (C 16 H 10 ) using a quantum cascade laser- based cavity ringdown.
Development Of An Optical Isolator For A FP-CW-QCL At 8.5μm Using An Experimental Faraday Rotator Brian E. Brumfield* Scott Howard ** Claire Gmachl **
PRECISION CAVITY ENHANCED VELOCITY MODULATION SPECTROSCOPY Andrew A. Mills, Brian M. Siller, Benjamin J. McCall University of Illinois, Department of Chemistry.
23 June Performance of a Continuous Supersonic Expansion Discharge Source Evaluated by Laser-Induced Fluorescence Spectroscopy.
CHEMSEM NEWS CHEMISTRY OF ASTRONOMICAL MOLECULES CHEMSEM NEWS 7, Fall 2010 CHEMISTRY OF ASTRONOMICAL MOLECULES BRIAN E BRUMFIELD Graduate Student University.
LINE PARAMETERS OF WATER VAPOR IN THE NEAR- AND MID-INFRARED REGIONS DETERMINED USING TUNEABLE LASER SPECTROSCOPY Nofal IBRAHIM, Pascale CHELIN, Johannes.
Towards High Resolution Cavity Enhanced Spectroscopy with Fast ion Beams Andrew Mills, Brian Siller, Manori Perera, Holger Kreckel, Ben McCall.
Holger Kreckel, Andrew Mills, Manori Perera, Brian Siller, Kyle Crabtree, Carrie Kauffman, Benjamin J. McCall University of Illinois at Urbana-Champaign.
Infrared Spectroscopy using Quantum Cascade Lasers Peng Wang and Tom Tague Bruker Optics, Billerica, MA Laurent Diehl, Christian Pflügl and Federico.
Mikael Siltanen,1 Markus Metsälä,1
High Precision Mid-Infrared Spectroscopy of 12 C 16 O 2 : Progress Report Speaker: Wei-Jo Ting Department of Physics National Tsing Hua University
Brian Siller, Andrew Mills, Michael Porambo & Benjamin McCall University of Illinois at Urbana-Champaign.
Brian Siller, Andrew Mills, Michael Porambo & Benjamin McCall Chemistry Department, University of Illinois at Urbana-Champaign.
Sub-Doppler Spectroscopy of Molecular Ions in the Mid-IR James N. Hodges, Kyle N. Crabtree, & Benjamin J. McCall WI06 – June 20, 2012 University of Illinois.
Fukuoka Univ. A. Nishiyama, A. Matsuba, M. Misono Doppler-Free Two-Photon Absorption Spectroscopy of Naphthalene Assisted by an Optical Frequency Comb.
High-Resolution Spectroscopy of the ν 8 Band of Methylene Bromide Using a Quantum Cascade Laser-Based Cavity Ringdown Spectrometer Jacob T. Stewart and.
Vibrational cooling of large molecules in supersonic expansions: The case of C 60 and pyrene Bradley M. Gibson and Jacob T. Stewart, Department of Chemistry,
A Search for the 8.5  m Vibrational Spectrum of C 60 in the Laboratory and Space Susanna L. Widicus Weaver 1, Brian E. Brumfield 1, Andrew A. Mills 1,
Development of a Sheath-Flow Supercritical Fluid Expansion Source for Vaporization of Nonvolatiles at Moderate Temperatures Bradley M. Gibson and Jacob.
Lineshape and Sensitivity of Spectroscopic Signals of N 2 + in a Positive Column Collected Using NICE-OHVMS Michael Porambo, Andrew Mills, Brian Siller,
Lineshape and Sensitivity of Spectroscopic Signals of N 2 + in a Positive Column Collected Using NICE-OHVMS Michael Porambo, Andrew Mills, Brian Siller,
HIGH PRECISION MID-IR SPECTROSCOPY OF N2O NEAR 4.5 μm Wei-jo (Vivian) Ting and Jow-Tsong Shy Department of Physics National Tsing Hua University Hsinchu,
Precision Measurement of CO 2 Hotband Transition at 4.3  m Using a Hot Cell PEI-LING LUO, JYUN-YU TIAN, HSHAN-CHEN CHEN, Institute of Photonics Technologies,
Rotationally-Resolved Spectroscopy of the Bending Modes of Deuterated Water Dimer JACOB T. STEWART AND BENJAMIN J. MCCALL DEPARTMENT OF CHEMISTRY, UNIVERSITY.
Beam Action Spectroscopy via Inelastic Scattering BASIS Technique Bobby H. Layne and Liam M. Duffy Department of Chemistry & Biochemistry, the University.
High-Resolution Visible Spectroscopy of H 3 + Christopher P. Morong, Christopher F. Neese and Takeshi Oka Department of Chemistry, Department of Astronomy.
High Precision, Sensitive, Near-IR Spectroscopy in a Fast Ion Beam Michael Porambo, Holger Kreckel, Andrew Mills, Manori Perera, Brian Siller, Benjamin.
PROGRESS & RESULTS IN THE DEVELOPMENTS OF THE SENSITIVE, COOLED, RESOLVED ION BEAM SPECTROMETER (SCRIBES) Andrew Mills, Brian Siller, Michael Porambo,
Continuous-Wave Cavity Ringdown Study of the 14 N 2 + Meinel System 2-1 Band and the First Positive Band System of N 2 * Departments of Chemistry and Astronomy,
Brian Siller, Andrew Mills, Michael Porambo & Benjamin McCall Chemistry Department, University of Illinois at Urbana-Champaign.
Rotationally-Resolved Infrared Spectroscopy of the ν 16 Band of 1,3,5- Trioxane Bradley M. Gibson, Nicole C. Koeppen Department of Chemistry, University.
The Infrared Spectrum of CH 5 + Revisited Kyle N. Crabtree, James N. Hodges, and Benjamin J. McCall.
K. Iwakuni, H. Sera, M. Abe, and H. Sasada Department of Physics, faculty of Science and Technology, Keio University, Japan 1 70 th. International Symposium.
Precision Laser Spectroscopy of H 3 + Hsuan-Chen Chen 1, Jin-Long Peng 2, Takayoshi Amano 3,4, Jow-Tsong Shy 1,5 1 Institute of Photonics Technologies,
High Precision Mid-IR Spectroscopy of 12 C 16 O 2 [10 0 1,02 0 1] I ← Band Near 2.7 µm Jow-Tsong Shy Department of Physics, National Tsing Hua University,
CH 3 D Near Infrared Cavity Ring-down Spectrum Reanalysis and IR-IR Double Resonance S. Luna Yang George Y. Schwartz Kevin K. Lehmann University of Virginia.
D. Zhao, K.D. Doney, H. Linnartz Sackler Laboratory for Astrophysics, Leiden Observatory, University of Leiden, the Netherlands T he 3 μm Infrared Spectra.
Cavity Ringdown Spectroscopy of Molecular Ions in a Fast Ion Beam Susanna L. Widicus Weaver, Andrew A. Mills, and Benjamin J. McCall Departments of Chemistry.
OBSERVATION AND ANALYSIS OF THE A 1 -A 2 SPLITTING OF CH 3 D M. ABE*, H. Sera and H. SASADA Department of Physics, Faculty of Science and Technology, Keio.
Broadband High-resolution Spectroscopy with Fabry-Perot Quantum Cascade Lasers Yin Wang and Gerard Wysocki Department of Electrical Engineering Princeton.
Brian Siller, Michael Porambo & Benjamin McCall Chemistry Department University of Illinois at Urbana-Champaign.
Rotational Spectroscopy of OCS in Superfluid Helium Nanodroplets Paul Raston, Rudolf Lehnig, and Wolfgang Jäger Department of Chemistry, University of.
Brian E. Brumfield † Susanna Widicus Weaver ‡ Claire Gmachl * Scott Howard* Benjamin McCall ‡ High-Resolution cw-CRDS of the ν 8 Band of Methylene Bromide.
High-resolution mid-infrared spectroscopy of deuterated water clusters using a quantum cascade laser- based cavity ringdown spectrometer Jacob T. Stewart.
INDIRECT TERAHERTZ SPECTROSCOPY OF MOLECULAR IONS USING HIGHLY ACCURATE AND PRECISE MID-IR SPECTROSCOPY Andrew A. Mills, Kyle B. Ford, Holger Kreckel,
June 18, 2008The University of Illinois 1 Continuous-wave Cavity Ringdown Study of the First Positive Band System of N 2 * Brett A. McGuire Susanna L.
Development of a Fast Ion Beam Spectrometer for Molecular Ion Spectroscopy Departments of Chemistry and Astronomy University of Illinois at Urbana-Champaign.
Initial Development of High Precision, High Resolution Ion Beam Spectrometer in the Near- Infrared Michael Porambo, Brian Siller, Andrew Mills, Manori.
Date of download: 6/17/2016 Copyright © 2016 SPIE. All rights reserved. Standard pump-probe saturation spectroscopy with electronic feedback to the laser.
Concentration Dependence of Line Shapes in the Band of Acetylene Matthew Cich, Damien Forthomme, Greg Hall, Chris McRaven, Trevor Sears, Sylvestre.
High Precision Mid-IR Spectroscopy of 12 C 16 O 2 : ← Band Near 4.3 µm Jow-Tsong Shy Department of Physics, National Tsing Hua University,
Optical Frequency Comb Referenced Sub-Doppler Resolution Difference-Frequency-Generation Infrared Spectroscopy K. Iwakuni, S. Okubo, H. Nakayama, and H.
SCRIBES Sensitive Cooled Resolved Ion BEam Spectroscopy
ISMS 2017 at CHAMPAIGN-URBANA, ILLINOIS
Mid-IR Direct Absorption/Dispersion Spectroscopy of a Fast Ion Beam
Jacob T. Stewart Department of Chemistry, Connecticut College
Doppler-free two-photon absorption spectroscopy of vibronic excited states of naphthalene assisted by an optical frequency comb UNIV. of Electro-Communications.
The Near-IR Spectrum of CH3D
Jacob T. Stewart and Bradley M
69th. International Symposium on Molecular Spectroscopy
High-Resolution Spectroscopy of the ν16 Band of 1,3,5-Trioxane
University of Arizona, Dept. of Physics
Indirect Rotational Spectroscopy of HCO+
Brian Siller, Andrew Mills, Michael Porambo & Benjamin McCall
Presentation transcript:

The Influence of Free-Running FP- QCL Frequency Jitter on Cavity Ringdown Spectroscopy of C 60 Brian E. Brumfield* Jacob T. Stewart* Matt D. Escarra** Claire Gmachl ** Benjamin McCall ‡ *Department of Chemistry, University of Illinois, Urbana, IL **Department of Electrical Engineering, Princeton University, Princeton Institute for the Science and Technology of Materials, Princeton, NJ ‡Departments of Chemistry and Astronomy, University of Illinois, Urbana, IL

Why do we care about FP-QCL frequency jitter?  Why high resolution C 60 spectroscopy? Supporting evidence for presence in ISM  Found in experiments simulating carbon star outflows  44 eV to break cage  Presence in meteorite impact sediments How to verify?  IR allowed vibrational band ~1184 cm -1  Allowed band is in atmospheric window allowing ground based observations  What’s necessary? High temperature oven to generate C 60 vapor An expansion source capable of producing “cold” C 60 molecules Tunable laser source ~1184 cm -1

Why do we care about FP-QCL frequency jitter?  Laser linewidth requirements Big molecule, small rotational constant ~ cm -1 (~90 MHz) Doppler linewidths from expansion source sub-100 MHz  To achieve the best desired resolution and sensitivity we want a narrow laser linewidth.

QCL Laser Linewidths  Distributed feedback (DFB)-QCLs 1-10 MHz linewidths  Heterodyne measurements  External cavity (EC)-QCL ~30 MHz linewidths  Analysis of lineshapes in absorption spectra  Frequency stability issues Temperature stability Power supply stability

Power Supply Stability Issues  Not initially apparent- back reflection issues  Mid-IR wavemeter provided real time information  Characterize linewidth using rovibrational transitions in ν 1 band of SO 2  Lightwave LDX-3232 preferable to Keithley A

Experimental Set-up Quantum Cascade Laser Mid-IR cw Wavemeter High finesse cavity Oven & Supersonic Expansion 1 Acousto-Optic Modulator Detector Bristol Mode-matching optics Direct Absorption Cell

SO 2 Direct Absorption: Pressure Broadening Studies Example Scans taken with LDX-3232

SO 2 Direct Absorption: Pressure Broadening Studies Frequency (cm -1 ) J’ Ka’,Kc’ J” Ka”,Kc” γ self expt (HWHM cm -1 /atm) uncertainty HITRAN γ self , , , , , , , , , , , , , , Using LDX-3232 Sumpf, B. J Mol. Struct., 599, 39 (2001)

“Low” Pressure SO 2 Spectra Lightwave LDX MHz Steps 880 mTorr SO 2 Keithley A 54 MHz Steps 660 mTorr SO 2

Measurement of N 2 O Line Noise Stdev~1.4x10 -8 cm R(49f)

Revisiting CH 2 Br 2 ?  Why CH 2 Br 2 Vibrational band falls within frequency coverage of QCL ( cm -1 ) Test molecule for beam overlap optimization Rotational temperature probe v 8 –CH 2 wag ~1197 cm -1

CH 2 Br 2 Example Scanning Window q Q 6 79_81 q Q 7 79_81 q Q 7 79_79 q Q 8 79_79 q Q 6 81_81 q Q 7 81_81

Old vs New CH 2 Br 2 Spectra *2007 Spectrum Shifted ~210 MHz

Future Directions  Optimize overlap of expansion source with laser beam.  Adjust expansion conditions and collect additional CH 2 Br 2 spectra  Turn on high temperature oven and observe impact on CH 2 Br 2 T rot  Begin scanning for C 60

Acknowledgements $$$ Funding $$$ NASA Laboratory Astrophysics Packard Foundation Dreyfus Foundation University of Illinois People Brian Siller Rich Saykally

Current CH 2 Br 2 Coverage