A spatio-spectral polarization analysis of 1 µm-pumped bulk supercontinuum in a cubic crystal (YAG)

Choudhuri, Aradhana; Chatterjee, Gourab; Zheng, Jian; Hartl, Ingmar; Ruehl, Axel; Miller, R. J. Dwayne

doi:10.1007/s00340-018-6966-1

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…As the actual recorded spectra are continuous at the merging wavelength, no further precaution is taken around this region while calculating this. The noise profile is similar to that observed in bulk supercontinuum generation 26 . The noise characteristics originate from electrical noise, shot noise and pulse fluctuations.…”

Section: Resultssupporting

confidence: 79%

Single 3.3 fs multiple plate compression light source in ultrafast transient absorption spectroscopy

Tamming

Lin

Hodgkiss

et al. 2021

Sci Rep

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Ultrafast transient absorption spectroscopy is a powerful tool to reveal excited state dynamics in various materials. Conventionally, probe pulses are generated via bulk supercontinuum generation or (noncollinear) optical parametric amplifiers whilst pump pulses are generated separately using (noncollinear) optical parametric amplifiers. These systems are limited by either their spectral density, stability, spectral range, and/or temporal compressibility. Recently, a new intense broadband light source is being developed, the multi-plate compression, which promises to overcome these limitations. In this paper, we analyze the supercontinuum generated by a single Multiple Plate Compression system to set a benchmark for its use in the field of ultrafast pump-probe spectroscopy. We have compressed the supercontinuum to 3.3 fs using chirp mirrors alone, making it an excellent candidate for pump-probe experiments requiring high temporal resolution. Furthermore, the single light source can be used to generate both probe and pump pulses due to its high spectral density (>14.5 nJ/nm) between 490 and 890 nm. The intensity has an average shot-to-shot relative standard deviation of 4.6 % over 490 to 890 nm, calculated over 2,000 sequential shots. By using only 1,000 shot pairs, a $$\Delta T/T$$ Δ T / T noise level of $$2.6\times 10^{-4}$$ 2.6 × 10 - 4 RMS is achieved. Finally, as a proof of concept, the transient absorption spectrum of a methylammonium lead iodide perovskite film is taken, showing great signal to noise with only 1,000 shot pairs. These results show great potential for the employment of this technique in other spectroscopic techniques such as coherent multidimensional spectroscopy.

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Section: Resultssupporting

confidence: 79%

Single 3.3 fs multiple plate compression light source in ultrafast transient absorption spectroscopy

Tamming

Lin

Hodgkiss

et al. 2021

Sci Rep

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“…It should be noted that a pump pulse energy at sub-µJ to few µJ level [5][6][7][8]19] has been used for laser filamentation and SCG in a solid because the multi-filamentation formation and the optical damage of medium are easily induced at high peak intensities and pulse energies. Energy scaling of a laser filament to the~100 µJ level in a solid can be much more beneficial for various applications in nonlinear optics and spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Multi-octave-spanning supercontinuum generation through high-energy laser filaments in YAG and ZnSe pumped by a 2.4 μm femtosecond Cr:ZnSe laser

Nam

Nagar

Dempsey

et al. 2021

High Pow Laser Sci Eng

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We present experimental and numerical investigations of high-energy mid-infrared filamentation with multi-octave-spanning supercontinuum generation (SCG), pumped by a 2.4 μm, 250 fs Cr:ZnSe chirped-pulse laser amplifier. The SCG is demonstrated in both anomalous and normal dispersion regimes with YAG and polycrystalline ZnSe, respectively. The formation of stable and robust single filaments along with the visible-to-mid-infrared SCG is obtained with a pump energy of up to 100 μJ in a 6-mm-long YAG medium. To the best of the authors’ knowledge, this is the highest-energy multi-octave-spanning SCG from a laser filament in a solid. On the other hand, the SCG and even-harmonic generation based on random quasi-phase matching (RQPM) are simultaneously observed from the single filaments in a 6-mm-long polycrystalline ZnSe medium with a pump energy of up to 15 μJ. The numerical simulations based on unidirectional pulse propagation equation and RQPM show excellent agreement with the measured multi-octave-spanning SCG and even-harmonic generation. They also reveal the temporal structure of mid-infrared filaments, such as soliton-like self-compression in YAG and pulse broadening in ZnSe.

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Experimental Results

Dubietis¹,

Couairon²

2019

SpringerBriefs in Physics

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A spatio-spectral polarization analysis of 1 µm-pumped bulk supercontinuum in a cubic crystal (YAG)

Cited by 4 publications

References 32 publications

Single 3.3 fs multiple plate compression light source in ultrafast transient absorption spectroscopy

Single 3.3 fs multiple plate compression light source in ultrafast transient absorption spectroscopy

Multi-octave-spanning supercontinuum generation through high-energy laser filaments in YAG and ZnSe pumped by a 2.4 μm femtosecond Cr:ZnSe laser

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