Experimental investigation of high-power single-pass Raman shifters in the ultraviolet with Nd:YAG and KrF lasers

Schoulepnikoff, Laurent de; Mitev, Vanio; Simeonov, V.; Calpini, B.; Bergh, Hubert van den

doi:10.1364/ao.36.005026

Cited by 39 publications

(15 citation statements)

References 32 publications

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“…The gain values for methane can be found, along with a thorough overview of SRS, in the literature. 22,23 The nth Stokes, n S , and anti-Stokes, n AS , wavelengths are given by…”

Section: B Stimulated Raman Scatteringmentioning

confidence: 99%

Raman-shifted eye-safe aerosol lidar

Mayor

Spuler

2004

Appl. Opt.

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The design features of, and first observations from, a new elastic backscatter lidar system at a wavelength of 1543 nm are presented. The transmitter utilizes stimulated Raman scattering in high-pressure methane to convert fundamental Nd:YAG radiation by means of the 1st Stokes shift. The wavelength-converting gas cell features multipass operation and internal fans. Unlike previous lidar developments that used Raman scattering in methane, the pump beam is not focused in the present configuration. This feature prevents optical breakdown of the gas inside the cell. Additionally, the gas cell is injection seeded by a diode to improve conversion efficiency and beam quality. The receiver uses a 40.6-cm-diameter telescope and a 200-microm InGaAs avalanche photodiode. The system is capable of operating in a dual-wavelength mode (1064 and 1543 nm simultaneously) for comparison or in a completely eye-safe mode. The system is capable of transmitting an energy of more than 200 mJ/pulse at 10 Hz. Aerosol backscatter data from vertical and horizontal pointing periods are shown.

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“…The gain values for methane can be found, along with a thorough overview of SRS, in the literature. 22,23 The nth Stokes, n S , and anti-Stokes, n AS , wavelengths are given by…”

Section: B Stimulated Raman Scatteringmentioning

confidence: 99%

Raman-shifted eye-safe aerosol lidar

Mayor

Spuler

2004

Appl. Opt.

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“…The photolysis light comes from Raman scattering in a high pressure cell filled with approximately 4 atm of hydrogen gas (Matheson, Ultra High Purity). 33 This pressure provides the most first anti-Stokes light (AS1, 309 nm), for which a 0.9 mJ pulse typically reaches the chamber after separation in a Pellin-Broca prism. We also use about 0.9 mJ of 355 nm light, but for the 416 nm light from first Stokes (S1) scattering, we typically use a 10 mJ pulse at the chamber.…”

Section: Experimental Approachmentioning

confidence: 99%

The influence of translational and vibrational energy on the reaction of Cl with CH3D

Berke

Volpa

Annesley

et al. 2013

The Journal of Chemical Physics

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The reaction of Cl atoms with CH3D proceeds either by abstraction of hydrogen to produce HCl + CH2D or by abstraction of deuterium to produce DCl + CH3. Using Cl atoms with different amounts of translational energy, produced by photolysis of Cl2 with 309, 355, or 416 nm light, reveals the influence of translational energy on the relative reaction probability for the two channels. These measurements give an estimate of the energy barrier for the reaction for comparison to theory and indicate that tunneling is the dominant reaction mechanism at low collision energies. Adding two quanta of C-H stretching vibration causes the reaction to proceed readily at all collision energies. Detecting the vibrational state of the CH2D product shows that vibrational energy initially in the surviving C-H bond appears as vibrational excitation of the product, an example of spectator behavior in the reaction. The reaction produces both stretch and stretch-bend excited products except at the lowest collision energy. A subtle variation in the reaction probability of the lowest energy rotational states with translational energy may reflect the presence of a van der Waals well in the entrance channel.

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“…As shown in recent years by several groups, the efficiency of SRS is high enough to use Stokes-shifted radiation in time-resolved pumpprobe experiments [20][21][22]. SRS in mixtures was studied before with ns-pulses [24,25], but few data are available on transient SRS in mixed gases. Even though the S1 output was attenuated, a considerable pump-only background was observed at energies of around 4 µJ.…”

Section: Introductionmentioning

confidence: 99%

Extending the Tuning Range of Short-Pulse Lasers by Transient Stimulated Raman Scattering in Gases

Fischer¹,

Krylov²,

Bespalov³

et al. 2002

Zeitschrift Für Physikalische Chemie

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Transient stimulated Raman scattering (SRS) is a convenient method to extend the tuning range of short-pulse lasers. In this paper we present results obtained by using 400 nm pump pulses of 2.5 ps duration. After briefly reviewing earlier work on transient SRS in pure hydrogen and in H 2 /CH 4 mixtures, we discuss new experiments on transient SRS in mixtures of HD with hydrogen and deuterium. In gas mixtures additional components, corresponding to the sum-and difference-frequencies of the components of the individual gases, are observed. In HD/H 2 mixtures, up to 6% of the pump pulse energy can be converted into the strongest combination line (−1/ − 1). From the experimentally determined optimum partial pressure ratios a differential Raman-cross section of 3.0 · 10 −30 cm −2 /sr was derived for the HD molecule.

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Experimental investigation of high-power single-pass Raman shifters in the ultraviolet with Nd:YAG and KrF lasers

Cited by 39 publications

References 32 publications

Raman-shifted eye-safe aerosol lidar

Raman-shifted eye-safe aerosol lidar

The influence of translational and vibrational energy on the reaction of Cl with CH3D

Extending the Tuning Range of Short-Pulse Lasers by Transient Stimulated Raman Scattering in Gases

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