Manifestation of spatial chirp in femtosecond noncollinear optical parametric chirped-pulse amplifier

Zaukevicius, Audrius; Jukna, Vytautas; Antipenkov, Roman; Martinėnaitė, Vilija; Varanavičius, A.; Piskarskas, A.; Valiulis, G.

doi:10.1364/josab.28.002902

Cited by 32 publications

(26 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The experimental findings were supported by a simple numerical model. Numerical simulations supported by experimental results reported by Zaukevičius et al [19] pointed out that at the magic angle pulse front tilt is still present, despite the vanishing angular dispersion, and can only be avoided by matching the pulse fronts of the pump and the signal. In that respect, experimental efforts to eliminate the pulse front tilt have been reported in the literature (see for example [20,21]).…”

Section: Introductionsupporting

confidence: 55%

“…An analytical study of spatiotemporal distortions in NOPCPAs is difficult, since the coupled-wave equations for three-wave mixing can be solved analytically only under very restrictive assumptions or approximations. Analytical expressions for the analysis of firstorder spatiotemporal distortions have been presented in [19]. However, for a complete study of spatiotemporal distortions under more realistic amplification conditions, numerical methods are indispensable.…”

Section: Spatiotemporal Distortions In Nopcpamentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers

Giree¹,

Mero²,

Arisholm³

et al. 2017

Opt. Express

View full text Add to dashboard Cite

During amplification in a noncollinear optical parametric amplifier the spatial and temporal coordinates of the amplified field are inherently coupled. These couplings or distortions can limit the peak intensity, among other things. In this work, a numerical study of the spatiotemporal distortions in BBO-based noncollinear optical parametric chirped-pulse amplifiers (NOPCPAs) is presented for a wide range of parameters and for different amplification conditions. It is shown that for Gaussian pump beams, gain saturation introduces strong distortions and high conversion efficiency always comes at the price of strong spatiotemporal couplings which drastically reduce the peak intensity even when pulse fronts of the pump and the signal are matched. However, high conversion efficiencies with minimum spatiotemporal distortions can still be achieved with flat-top pump beam profiles.

show abstract

Section: Introductionsupporting

confidence: 55%

Section: Spatiotemporal Distortions In Nopcpamentioning

confidence: 99%

Numerical study of spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers

Giree¹,

Mero²,

Arisholm³

et al. 2017

Opt. Express

View full text Add to dashboard Cite

show abstract

“…We discovered, by scanning the spectrometer fiber tip across the transverse position of the beam, that the OPCPA output beam has a strong spatial chirp. This effect is an intrinsic feature of the non-collinear geometry of optical parametric amplifiers [16,17] and should be taken into account in experiments where an OPCPA output is launched into a hollow-core waveguide.…”

mentioning

confidence: 99%

Carrier-envelope-phase-stable soliton-based pulse compression to 44 fs and ultraviolet generation at the 800 kHz repetition rate

et al. 2019

View full text Add to dashboard Cite

We report generation of a femtosecond supercontinuum extending from the ultraviolet to the near-infrared and detection of its carrier-envelope phase variation by f-to-2f interferometry. The spectrum is generated in a gas-filled hollow-core photonic crystal fiber where soliton dynamics allows CEP-stable self-compression of OPCPA pump pulses at 800 nm to a duration of 1.7 optical cycles, followed by dispersive wave emission. The source provides up to 1 μJ of pulse energy at 800 kHz repetition rate resulting in 0.8 W of average power, and can be extremely useful for example in strong-field physics, pump-probe measurements and ultraviolet frequency comb metrology.

show abstract

“…1). The SCH induced from the NOPA [4] was sufficient enough to provide strong PFT and is measured by scanning a spectrometer across the pulse with the slope of the wavelength vs. position (Fig. 1).…”

mentioning

confidence: 99%

Harnessing polarization spatio-temporal coupling: a new degree of freedom in ultrafast laser material processing

2015

View full text Add to dashboard Cite

Polarization spatio-temporal coupling reveals new degree of freedom in ultrafast laser material processing. Control of modification in fused silica is demonstrated with the use of prism compressors and polarization azimuth of ultrashort pulse laser beam.OCIS codes: (140.3390) Laser material processing; (320.7120) Ultrafast phenomenaThe nanostructuring of transparent media with ultrafast laser pulses has attracted significant interest due to its unique applications. However, little is understood with respect to the physics of light-matter interaction. While most of the formalism for ultrashort pulses expresses the electric field separately in terms of temporal and spatial dependences, one of the major properties of ultrashort pulse generation is spatio-temporal distortions. Studies have shown spatio-temporal induced phenomena with respect to writing direction [1,2] and anisotropic photosensitivity [3] all based around pulse front tilt (PFT) yet they lack the control and understanding of the orientation, direction and quantity of the spatio-temporal distortions. Here we demonstrate the control and characterization of spatio-temporal distortions and PFT with the use of prism compressors in order to control and understand ultrafast phenomena associated with material modification. We also demonstrate anisotropic photosensitivity in fused silica for the first time, to the author's knowledge, which adds an additional level of control with respect to laser material modification. and 10000 pulses when polarization is parallel (0°) and perpendicular (90°) to PFT (Pulse Energy = 1.2 μJ, NA=0.65, PFT = 13.5 fs/mm)A mode-locked regenerative amplified Ytterbium doped Potassium-Gadolinium Tungstate (Yb:KGW) based femtosecond PHAROS laser system (Light Conversion Ltd.) was used in conjunction with a non-collinear optical parametric amplifier (NOPA) to generate femtosecond pulses at 700 nm with 200 kHz repetition rate. A prism compressor in a double pass geometry is used to control the temporal chirp and pulse duration. The laser is then sent to a stage set-up where the laser is focussed into the bulk of fused silica with a 0.65 NA objective lens. A λ/2 waveplate is used to control the polarization orientation with respect to the PFT. The pulses are characterized using a ThorLabs Pulse Characterization FROG Scanning Module; a SHG-based FROG. The ThorLabs based retrieval software measures the trace and reconstructs the electric field to provide the pulse duration and the group delay

show abstract

Manifestation of spatial chirp in femtosecond noncollinear optical parametric chirped-pulse amplifier

Cited by 32 publications

References 29 publications

Numerical study of spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers

Numerical study of spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers

Carrier-envelope-phase-stable soliton-based pulse compression to 44 fs and ultraviolet generation at the 800 kHz repetition rate

Harnessing polarization spatio-temporal coupling: a new degree of freedom in ultrafast laser material processing

Contact Info

Product

Resources

About