Stimulated Raman scattering of picosecond light pulses in hydrogen, deuterium, and methane

Hanna, D.C.; Pointer, D.; Pratt, D. J.

doi:10.1109/jqe.1986.1072945

Cited by 112 publications

(24 citation statements)

References 28 publications

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“…The theoretical method for the calculation of E th in the case T 2 Ä p has been already established 25,26 and it yields satisfactory agreement with the experimental data. Near the threshold of SRS, i.e.…”

Section: Appendixmentioning

confidence: 73%

Characterization of stimulated Raman scattering of hydrogen and methane gases as a light source for picosecond time-resolved Raman spectroscopy

Uesugi

Mizutani

Kruglik

et al. 2000

J. Raman Spectrosc.

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Stimulated Raman scattering (SRS) in compressed hydrogen and methane gas was characterized in terms of pulse energy, temporal width and spectral width in the range of gas pressures 10-60 atm to use it as a light source for picosecond time-resolved resonance Raman spectroscopy. SRS was pumped by the second harmonic of a Ti : sapphire oscillator-regenerative amplifier laser system with pulse energy up to 200 µJ, duration ∼2.5 ps and repetition rate 1 kHz. The output spectral region 421-657 nm was covered by the first and second Stokes SRS components on tuning of the pump wavelength in the range 375-425 nm. Energy conversion to the first Stokes SRS component was more than 10% with H 2 and more than 20% with CH 4 . The temporal width of the SRS pulse (1.1-2.1 ps) was shorter than that of the pump pulse. The spectral band shape was found to be modulated, since the SRS is generated in a transient regime. When more than 100 pulses were averaged, the temporal and spectral profiles of SRS pulses were sufficiently smooth and energy fluctuations were sufficiently small for spectroscopic applications. On the basis of the results obtained, optimized conditions as a Raman shifter were deduced. The Raman shifter served as a light source for two-color pump-probe time-resolved resonance Raman (TR 3 ) experiments and to demonstrate its capabilities, picosecond TR 3 spectra of nickel tetraphenylporphyrin in toluene solution were measured.

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Section: Appendixmentioning

confidence: 73%

Characterization of stimulated Raman scattering of hydrogen and methane gases as a light source for picosecond time-resolved Raman spectroscopy

Uesugi

Mizutani

Kruglik

et al. 2000

J. Raman Spectrosc.

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“…For this purpose, measured optical losses at wavelengths of 1.56 and 4.4 µm (Figure 13a) were taken into account. Raman gain coefficient g R = 0.43 cm/GW was calculated for 1.56 → 4.4 µm conversion using the available data on the linewidth and scattering cross section of the Q(1) vibrational transition of molecular hydrogen [62][63][64]. The theoretically evaluated optimal Raman laser length was found to be~3.5 m, which is substantially shorter than the hollow-core fiber length (15 m) that was used in previous experiments.…”

Section: Mid-infrared Raman Laser Based On Revolver Fibersmentioning

confidence: 99%

“…One interesting result that was obtained in [61] is the possibility of maintaining steady-state SRS when GFLs are pumped by nanosecond pulses. It is known [62] that, if the pump pulse duration (τp) and the dephasing time of optical phonons (Т2) meet the relationship τp ≤ 20·Т2, SRS conversion is a transient process, in which the Raman gain coefficient decreases. However, Т2 can be easily controlled by varying the pressure of a gas, filling RF core, since the collision frequency of molecules grows with gas pressure, which leads to more frequent changes in the phase of molecular vibrations, and, therefore, to Т2reduction.…”

Section: Mid-infrared Raman Laser Based On Revolver Fibersmentioning

confidence: 99%

Revolver Hollow Core Optical Fibers

Bufetov

Косолапов

Pryamikov

et al. 2018

Fibers

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Revolver optical fibers (RF) are special type of hollow-core optical fibers with negative curvature of the core-cladding boundary and with cladding that is formed by a one ring layer of capillaries. The physical mechanisms contributing to the waveguiding parameters of RFs are discussed. The optical properties and possible applications of RFs are reviewed. Special attention is paid to the mid-IR hydrogen Raman lasers that are based on RFs and generating in the wavelength region from 2.9 to 4.4 μm.

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“…In the past, SRS in gases [1], liquids [2] and solids Raman materials [3] has been often used for frequency shifting through the Stokes-and anti-Stokescomponents generated [4]. Generally speaking, SRS in solid-state crystals has a possibility of designing all-solid-state lasers emitting radiation in specified spectral regions [5,6].…”

Section: Introductionmentioning

confidence: 99%

High-peak power multi-wavelength picosecond pulses generated from a BaWO4 Raman-seeded optical parametric amplifier

Du¹,

Shi²,

Zhang³

et al. 2009

Optics Communications

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Stimulated Raman scattering of picosecond light pulses in hydrogen, deuterium, and methane

Cited by 112 publications

References 28 publications

Characterization of stimulated Raman scattering of hydrogen and methane gases as a light source for picosecond time-resolved Raman spectroscopy

Characterization of stimulated Raman scattering of hydrogen and methane gases as a light source for picosecond time-resolved Raman spectroscopy

Revolver Hollow Core Optical Fibers

High-peak power multi-wavelength picosecond pulses generated from a BaWO4 Raman-seeded optical parametric amplifier

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