Raman conversion of femtosecond laser pulses in crystals

Orlovich, V. A.; Malakhov, Yu. I.; Popov, Yu. M.; Busko, Dmitry; Danailov, M. B.; Demidovich, Alexander; Апанасевич, П. А.; Chulkov, R. V.

doi:10.7452/lapl.201210058

Cited by 15 publications

(3 citation statements)

References 9 publications

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“…Raman conversion in solid-state media has been investigated in the continuous-wave (CW) [3][4][5], nanosecond [6] and picosecond [7][8][9][10] regimes. Single-pass SRS conversion of femtosecond pulses has been demonstrated [11,12] in which some spectral broadening was observed. By resonating the Stokes beam and using synchronous pumping, a much lower threshold can be obtained, and efficient conversion of pulse trains from standard femtosecond oscillators can be achieved [2].…”

Section: Introductionmentioning

confidence: 99%

Efficient diamond Raman laser generating 65 fs pulses

Murtagh¹,

Lin²,

Mildren³

et al. 2015

Opt. Express

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We report a synchronously-pumped femtosecond diamond Raman laser operating at 890 nm with a slope efficiency of 32%. Pumped using a mode-locked Ti:Sapphire laser at 796 nm with a pulse duration of 194 fs, the bandwidth of the Stokes output was broadened to enable subsequent pulse compression to 65 fs using a prism-pair. Modelling results provide an understanding of the physical mechanisms involved in the Raman conversion of femtosecond pulses, supporting an in-depth characterization of these ultrashort pulsed lasers.

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Section: Introductionmentioning

confidence: 99%

Efficient diamond Raman laser generating 65 fs pulses

Murtagh¹,

Lin²,

Mildren³

et al. 2015

Opt. Express

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“…Transient stimulated Raman amplification (SRA) of femtosecond pulses increases conversion efficiency and provides additional spectrum broadening [9]. Accordingly, the SRA conversion efficiency of 50% [10] or 5-fold spectral broadening compared to the pump with SC pulses [11] in potassium gadolinium tungstate [KGd(WO4)2] (KGW) [12] crystals have been reported.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Adjacent Stokes Spectra in a Two-Stage Transient Stimulated Raman Chirped-Pulse Amplifier

2022

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The synthesis of adjacent overlapped Stokes spectra in two stages of a transient stimulated Raman chirped-pulse amplifier, tuned respectively to the vibrational modes at 901 and 767 cm−1 of a potassium gadolinium tungstate [KGd(WO4)2] crystal, is demonstrated. The contribution of the spatio-temporal overlap of seed and pump pulses, as well as the self-phase modulation, was investigated. The noncollinear configuration allows the composite bandwidth at the central wavelength of 1120 nm to be increased by a factor of 23 compared to the pump pulse bandwidth of 1.6 nm. After reaching a conversion efficiency of 35% in the second stage, the compressibility of a chirped Stokes pulse with a tailored spectrum was also investigated.

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“…First, chirped Raman pulse with subsequent recompression was used [14]. Second, focusing of the femtosecond pump radiation by an axicon was used [15]. Finally, an efficient Stokes generation in a Raman-active crystal (diamond) under synchronous pumping by repetitive femtosecond laser pulses in an external cavity with a round-trip time equal to the pump pulse repetition period has been successfully achieved [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

860 fs GdVO₄ Raman laser at 1228 nm pumped by 36 ps, 1063 nm laser

et al. 2019

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The first femtosecond crystalline Raman laser pumped by a picosecond laser is demonstrated. The method consisted of a synchronously pumped cascade SRS process. This process is started with extracavity Raman conversion from pump radiation into the long-shifted Stokes component and continues with secondary intracavity Raman conversion from the long-shifted Stokes component into the Stokes component with combined long and short Raman shift. This secondary conversion shows strong pulse shortening down to the inverse width of the widest short-shift Raman line. We report characteristics of the all-solid-state extracavity Raman laser based on the 16 mm long a-cut GdVO 4 crystal under synchronous pumping by the 1063 nm 36 picosecond 150 MHz Nd:GdVO 4 laser. Cascade two-wavelength Raman generation in the external high-Q ring cavity has been obtained not only at the usual wavelength of 1174 nm corresponding to the long-shifted first Stokes component, but also at the unusual wavelength of 1228 nm having the combined long and short Raman shift. The individual pulse energy of the 1228 nm radiation was up to 10 nJ and slope efficiency of 5%. Significant shortening of the 36 ps pump pulse down to 860 fs at 1228 nm has been demonstrated without using any compressor.

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Raman conversion of femtosecond laser pulses in crystals

Cited by 15 publications

References 9 publications

Efficient diamond Raman laser generating 65 fs pulses

Efficient diamond Raman laser generating 65 fs pulses

Synthesis of Adjacent Stokes Spectra in a Two-Stage Transient Stimulated Raman Chirped-Pulse Amplifier

860 fs GdVO₄ Raman laser at 1228 nm pumped by 36 ps, 1063 nm laser

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Raman conversion of femtosecond laser pulses in crystals

Cited by 15 publications

References 9 publications

Efficient diamond Raman laser generating 65 fs pulses

Efficient diamond Raman laser generating 65 fs pulses

Synthesis of Adjacent Stokes Spectra in a Two-Stage Transient Stimulated Raman Chirped-Pulse Amplifier

860 fs GdVO4 Raman laser at 1228 nm pumped by 36 ps, 1063 nm laser

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Product

Resources

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860 fs GdVO₄ Raman laser at 1228 nm pumped by 36 ps, 1063 nm laser