Measurements of the GVD of water and methanol and laser pulse characterization using direct imaging methods

Scarborough, Timothy D.; Petersen, Chad; Uiterwaal, Cornelis

doi:10.1088/1367-2630/10/10/103011

Cited by 4 publications

(6 citation statements)

References 12 publications

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“…8,10 The goal of this paper is to introduce a pulse measurement device that is relatively inexpensive and that it is expected to work in a broad wavelength range. This new device is based on a previous experiment 11 done by our group, combined with a homebuilt Broadband Pulse Compressor (BPC) based on the Trebino BOA compressor. 12,13 Below, we will describe our setup in three steps:…”

Section: Review Ofmentioning

confidence: 99%

“…The compressor parameter G C is fixed by the pulse compressor's geometry. 11 As shown in Fig. 1, when a pulse with negative chirp travels through an optical medium, it will acquire zero chirp after a certain distance, which we call zopt.…”

Section: Theorymentioning

confidence: 99%

“…Once Kom is found, we can estimate the transform-limited pulse duration Δtopt from the FWHM value z 1/2 of the fluorescence signal S(z), after first correcting this signal for the exponential absorption exp(−2βz). The transform-limited pulse duration Δtopt is given by 11 Δt 2 opt = Kom…”

Section: Review Of Scientific Instrumentsmentioning

confidence: 99%

“…This concentration was chosen because it minimizes absorption by the dye, which can impact experimental outcomes. 11 The dye solution was left undisturbed for 24 h to allow any suspended, undissolved dye particles to settle down. The mean power of the beam was reduced to about 20 mW 11 to avoid nonlinear absorption effects in the liquid.…”

Section: Experimental Procedures and Data Analysis A Liquid Solution ...mentioning

confidence: 99%

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Ultrafast pulse duration measurement method of near-infrared pulses for a broad range of wavelengths using two-photon absorption in a liquid and fluorescent dye solution

Syed,

Uiterwaal

2023

Review of Scientific Instruments

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A novel characterization method to measure the pulse duration of ultrafast near-IR pulses is introduced, which uses simple tabletop optics, is relatively inexpensive, and is expected to work in a broad wavelength range. Our diagnostic tool quantitatively characterizes the laser pulse duration of any near-IR wavelength assuming a Gaussian pulse shape with a linear chirp. We negatively prechirp near-IR pulses with a home-built broadband pulse compressor (BPC) and send this prechirped beam through a cell filled with a low-molar solution of a fluorescent dye in a liquid. After two-photon absorption, this dye fluoresces in the visible, and we record this visible signal as a function of the propagation distance in the liquid cell. We calibrate the group velocity dispersion (GVD) of our home-built BPC device against the known GVD of the compressor of our 800 nm laser and confirm this value using geometric considerations. Now knowing the GVD of BPC and the recorded visible signal for various amounts of negative chirp, let us extract the smallest pulse duration of the near-IR pulse from this visible signal. As a useful corollary, our analysis also enables the direct measurement of the GVD for liquids and the indirect measurement of the absorption coefficient for liquids in the near-IR range, in contrast to indirect GVD measurements that rely on methods such as the double derivative of the refractive index.

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Section: Review Ofmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Review Of Scientific Instrumentsmentioning

confidence: 99%

Section: Experimental Procedures and Data Analysis A Liquid Solution ...mentioning

confidence: 99%

See 2 more Smart Citations

Ultrafast pulse duration measurement method of near-infrared pulses for a broad range of wavelengths using two-photon absorption in a liquid and fluorescent dye solution

Syed,

Uiterwaal

2023

Review of Scientific Instruments

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“…The GVD of many solids [6][7][8] and liquids [9,10] have been measured with several experimental methods. However, GVD information for gas phase molecules is not as prevalent.…”

Section: Introductionmentioning

confidence: 99%

Group-velocity-dispersion measurements of atmospheric and combustion-related gases using an ultrabroadband-laser source

et al. 2011

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The use of femtosecond-laser sources for the diagnostics of combustion and reacting-flow environments requires detailed knowledge of optical dispersive properties of the medium interacting with the laser beams. Here the second- and third-order dispersion values for nitrogen, oxygen, air, carbon dioxide, ethylene, acetylene, and propane within the 700-900 nm range are reported, along with the pressure dependence of the chromatic dispersion. The effect of dispersion on axial resolution when applied to nonlinear spectroscopy with ultrabroadband pulses is also discussed.

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Refractive, dispersive and thermo-optic properties of twelve organic solvents in the visible and near-infrared

et al. 2013

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Measurements of the GVD of water and methanol and laser pulse characterization using direct imaging methods

Cited by 4 publications

References 12 publications

Ultrafast pulse duration measurement method of near-infrared pulses for a broad range of wavelengths using two-photon absorption in a liquid and fluorescent dye solution

Ultrafast pulse duration measurement method of near-infrared pulses for a broad range of wavelengths using two-photon absorption in a liquid and fluorescent dye solution

Group-velocity-dispersion measurements of atmospheric and combustion-related gases using an ultrabroadband-laser source

Refractive, dispersive and thermo-optic properties of twelve organic solvents in the visible and near-infrared

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