Direct Frequency Comb Spectroscopy for the Study of Molecular Dynamics in the Infrared Fingerprint Region Adam J. Fleisher , Bryce Bjork, Kevin C. Cossel, Jun Ye JILA|NIST and University of Colorado - Boulder Lora Nugent-Glandorf, Florian Adler, Tyler Neely, Scott A. Diddams National Institute of Standards and Technology Tim Dinneen Precision Photonics FA 11 The 67 th OSU International Symposium on Molecular Spectroscopy – June 22, 2012
23
Embed
Direct Frequency Comb Spectroscopy for the Study of Molecular Dynamics in the Infrared Fingerprint Region Adam J. Fleisher, Bryce Bjork, Kevin C. Cossel,
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Direct Frequency Comb Spectroscopy for the Study of Molecular Dynamics in
the Infrared Fingerprint Region
Adam J. Fleisher, Bryce Bjork, Kevin C. Cossel, Jun YeJILA|NIST and University of Colorado - Boulder
Lora Nugent-Glandorf, Florian Adler, Tyler Neely, Scott A. DiddamsNational Institute of Standards and Technology
Tim DinneenPrecision Photonics
FA 11The 67th OSU International Symposium on Molecular Spectroscopy – June 22, 2012
K.C. Cossel et al, Appl. Phys. B, 100, 917 (2010).L.S. Rothman et al. J. Quant. Spectrosc. Radiat. Transfer 96 139 (2005).
Wavelength (nm)
2,300 comb modes in the above spectral bandwidth.
Wavelength (nm)
Experimental Frequency Axis Calibrated to HITRAN
ax2 + bx +c
VIPA = 25°
2
20
1 1 1ln 1
2 1
R
L R I I
Molecular Gas Dynamics
L. Nugent-Glandorf et al. Opt. Lett., in press (2012). arXiv: 1206.1316
Noise5 x 10-4 noise floor (ms)
1 x 10-8 cm-1 (5 avr., 42 ms, 200 m path length)
640 x 512 pixel camera120 Hz repetition rate
CH4 gas cell filling dynamics - NIST
Future: MIR Reaction Dynamics
A. Foltynowicz et al. Appl. Phys. B. doi:10.1007/s00340-012-5024-7(2012).L. Nugent-Glandorf et al. Opt. Lett., in press (2012). arXiv: 1206.1316
• Enhancement factor of ≥ 300 leads to mW/mode of intracavity power• 5,000 lasers available for cavity-enhanced spectroscopy• 100 cm-1 simultaneous bandwidth• Integration time as low as 10 μs (camera limit)• Experimental repetition rate of up to 400 Hz (camera limit)
MIR Comb VIPA and Camera
Inlet
Enhancement Cavity
PZT
Outlet
AcknowledgementsBryce Bjork, Kevin C. Cossel, Jun Ye
JILA|NIST and CULora Nugent-Glandorf, Florian Adler, Tyler Neely, Scott A. Diddams
National Institute of Standards and TechnologyTim Dinneen
Precision Photonics
L. Nugent-Glandorf et al. Optics Letters (2012).
arXiv: 1206.1316
Virtually Imaged Phased Array
M. Shirasaki Fujitsu Sci. Tech J. 35, 113 (1999).
Noise Analysis
Insert Citation Here
Signal Averaging
Insert Citation Here
1 FSR
Single 2ms shot 20 averaged shots
Frequency Comb
Insert Citation Here
Frequency Domain
Frequency comb
Cavity modes
ddcL
cFSR
2
Cavity mode structure:Frequency comb structure:
orn fnf
Time Domain ADD SINGLE PULSE VS. PULSE TRAIN IMAGE HERE
1. Mode-locked laser
T.R. Schibli et al. Nat. Photonics 2, 355 (2008).F. Adler et al. Opt. Lett. 34, 1330 (2009).