Characterization of ultrashort pulses by a modified grating-eliminated no-nonsense observation of ultrafast incident laser light E fields (GRENOUILLE) method

Abstract

The measurement and characterization of ultrashort laser pulses remains an arduous task. The most commonly used pulse-measurement method is known as frequency-resolved optical gating (FROG), and another version with great experimental simplification and low-priced setup is known as gratingeliminated no-nonsense observation of ultrafast incident laser light E fields (GRENOUILLE). Nevertheless, there is interest in elaborating other, more accessible or simpler and cheaper, setups with equal or better assets. We explored modification of the GRENOUILLE method in which we replaced the original Fresnel biprism with a beam splitter and two mirrors and used a cheap webcam to measure the pulse traces. We have evaluated our system, and we propose a method to correct border effects caused by the beam intensity's profile based on the characterization of three pulse classes: Fourier-transform limited, double, and chirped. We compare the recovered electric field with further spectral and second-order correlation data of the corresponding pulses.

Time-resolved optical Kerr-effect investigation on CS2/polystyrene mixtures

“…The ultrafast OHD-OKE measurements were carried out using linearly polarized laser pulses with duration of approximately 100 fs and with a center wavelength of 780 nm ͑the pulse is characterized by the modified Grenouille method 14 and the temporal envelope is well described by a square-root hyperbolic secant͒. The pulses were generated in a commercial Kerr-lens mode-locked Ti:Sapphire laser ͑Mira 900 Coherent͒ pumped by a 5-W ͑CW͒ intracavity-doubled diode-pumped Nb: YVO 4 laser ͑Coherent Verdi͒.…”

Molecular dynamics investigation with the time resolved optical Kerr effect on the CS2–C6H6 mixtures

“…The ultrafast OHD-OKE measurements were carried out using linearly polarized laser pulses with duration of approximately 100 fs and with a center wavelength of 780 nm ͑the pulse was characterized by the modified grating eliminated no-nonsense observation of ultrafast incident laser light E-fields ͑GRENOUILLE͒ method 23 and the temporal envelope is well described by a square root hyperbolic se-cant͒. The pulses were generated in a commercial Kerr-lens mode-locked Ti:Sapphire laser ͑Mira 900 Coherent͒ pumped by a 5 W ͑cw͒ intracavity-doubled diode-pumped Nd: YVO 4 laser ͑Coherent Verdi͒.…”

TIGER: TIme-Gated Electric field Reconstruction

“…It implies that, at the propagation distance where the four beams overlap, there is direct linear correspondence between the delays (τ 1 , τ 2 ) and the (x, y) coordinates. The four-faced pyramid can then be viewed as a bi-dimensional extension of the Fresnel biprism, which is commonly used in single shot characterization devices for creating two time-delayed replicas in a single spatial dimension [12,13].…”