A 100 kHz pulse shaping 2D-IR spectrometer based on dual Yb:KGW amplifiers

P.M. Donaldson, G.M. Greetham, D.J. Shaw, A.W. Parker, M. Towrie

Research output: Contribution to journalArticle

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Abstract

A high-speed, high-sensitivity and compact two-dimensional infrared (2D-IR) spectrometer based on 100 kHz Yb:KGW regenerative amplifier technology is described and demonstrated. The setup is three color, using an independent pump OPA and two separately tunable probe OPAs. The spectrometer uses 100 kHz acousto-optic pulse shaping on the pump beam for rapid 2D-IR acquisitions. The shot-to-shot stability of the laser system yields excellent signal-to-noise figures (∼10 μOD noise on 5000 laser shots). We show that the reduced bandwidth of the Yb:KGW amplifiers in comparison with conventional Ti:sapphire systems does not compromise the ability of the setup to generate high-quality 2D-IR data. Instrument responses of <300 fs are demonstrated and 2D-IR data presented for several systems of interest to physical chemists, showing spectral diffusion in NaSCN, amide I and II bands of a β sheet protein and DNA base-pair–backbone couplings. Overall, the increased data acquisition speed, intrinsic stability, and robustness of the Yb:KGW lasers are a significant step forward for 2D-IR spectroscopy.
LanguageEnglish
Pages780–787
Number of pages8
JournalJournal of Physical Chemistry A
Volume122
Issue number3
Early online date18 Dec 2017
DOIs
StatePublished - 25 Jan 2018

Fingerprint

Pulse shaping
Infrared spectrometers
shot
amplifiers
spectrometers
Lasers
pulses
Pumps
pumps
lasers
Aluminum Oxide
Noise figure
acousto-optics
Amides
amides
data acquisition
Spectrometers
Infrared spectroscopy
Optics
Data acquisition

Keywords

  • infrared spectroscopy
  • 2D-IR spectroscopy
  • tunable light

Cite this

Donaldson, P. M., Greetham, G. M., Shaw, D. J., Parker, A. W., & Towrie, M. (2018). A 100 kHz pulse shaping 2D-IR spectrometer based on dual Yb:KGW amplifiers. Journal of Physical Chemistry A, 122(3), 780–787. DOI: 10.1021/acs.jpca.7b10259
Donaldson, P.M. ; Greetham, G.M. ; Shaw, D.J. ; Parker, A.W. ; Towrie, M./ A 100 kHz pulse shaping 2D-IR spectrometer based on dual Yb:KGW amplifiers. In: Journal of Physical Chemistry A. 2018 ; Vol. 122, No. 3. pp. 780–787
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abstract = "A high-speed, high-sensitivity and compact two-dimensional infrared (2D-IR) spectrometer based on 100 kHz Yb:KGW regenerative amplifier technology is described and demonstrated. The setup is three color, using an independent pump OPA and two separately tunable probe OPAs. The spectrometer uses 100 kHz acousto-optic pulse shaping on the pump beam for rapid 2D-IR acquisitions. The shot-to-shot stability of the laser system yields excellent signal-to-noise figures (∼10 μOD noise on 5000 laser shots). We show that the reduced bandwidth of the Yb:KGW amplifiers in comparison with conventional Ti:sapphire systems does not compromise the ability of the setup to generate high-quality 2D-IR data. Instrument responses of <300 fs are demonstrated and 2D-IR data presented for several systems of interest to physical chemists, showing spectral diffusion in NaSCN, amide I and II bands of a β sheet protein and DNA base-pair–backbone couplings. Overall, the increased data acquisition speed, intrinsic stability, and robustness of the Yb:KGW lasers are a significant step forward for 2D-IR spectroscopy.",
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Donaldson, PM, Greetham, GM, Shaw, DJ, Parker, AW & Towrie, M 2018, 'A 100 kHz pulse shaping 2D-IR spectrometer based on dual Yb:KGW amplifiers' Journal of Physical Chemistry A, vol. 122, no. 3, pp. 780–787. DOI: 10.1021/acs.jpca.7b10259

A 100 kHz pulse shaping 2D-IR spectrometer based on dual Yb:KGW amplifiers. / Donaldson, P.M.; Greetham, G.M.; Shaw, D.J.; Parker, A.W.; Towrie, M.

In: Journal of Physical Chemistry A, Vol. 122, No. 3, 25.01.2018, p. 780–787.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A 100 kHz pulse shaping 2D-IR spectrometer based on dual Yb:KGW amplifiers

AU - Donaldson,P.M.

AU - Greetham,G.M.

AU - Shaw,D.J.

AU - Parker,A.W.

AU - Towrie,M.

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N2 - A high-speed, high-sensitivity and compact two-dimensional infrared (2D-IR) spectrometer based on 100 kHz Yb:KGW regenerative amplifier technology is described and demonstrated. The setup is three color, using an independent pump OPA and two separately tunable probe OPAs. The spectrometer uses 100 kHz acousto-optic pulse shaping on the pump beam for rapid 2D-IR acquisitions. The shot-to-shot stability of the laser system yields excellent signal-to-noise figures (∼10 μOD noise on 5000 laser shots). We show that the reduced bandwidth of the Yb:KGW amplifiers in comparison with conventional Ti:sapphire systems does not compromise the ability of the setup to generate high-quality 2D-IR data. Instrument responses of <300 fs are demonstrated and 2D-IR data presented for several systems of interest to physical chemists, showing spectral diffusion in NaSCN, amide I and II bands of a β sheet protein and DNA base-pair–backbone couplings. Overall, the increased data acquisition speed, intrinsic stability, and robustness of the Yb:KGW lasers are a significant step forward for 2D-IR spectroscopy.

AB - A high-speed, high-sensitivity and compact two-dimensional infrared (2D-IR) spectrometer based on 100 kHz Yb:KGW regenerative amplifier technology is described and demonstrated. The setup is three color, using an independent pump OPA and two separately tunable probe OPAs. The spectrometer uses 100 kHz acousto-optic pulse shaping on the pump beam for rapid 2D-IR acquisitions. The shot-to-shot stability of the laser system yields excellent signal-to-noise figures (∼10 μOD noise on 5000 laser shots). We show that the reduced bandwidth of the Yb:KGW amplifiers in comparison with conventional Ti:sapphire systems does not compromise the ability of the setup to generate high-quality 2D-IR data. Instrument responses of <300 fs are demonstrated and 2D-IR data presented for several systems of interest to physical chemists, showing spectral diffusion in NaSCN, amide I and II bands of a β sheet protein and DNA base-pair–backbone couplings. Overall, the increased data acquisition speed, intrinsic stability, and robustness of the Yb:KGW lasers are a significant step forward for 2D-IR spectroscopy.

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Donaldson PM, Greetham GM, Shaw DJ, Parker AW, Towrie M. A 100 kHz pulse shaping 2D-IR spectrometer based on dual Yb:KGW amplifiers. Journal of Physical Chemistry A. 2018 Jan 25;122(3):780–787. Available from, DOI: 10.1021/acs.jpca.7b10259