Design, Construction and Calibration of a GRENOUILLE, Single-Shot, Ultrashort-Pulse Measurement System

Yang, Byung-Kwan; Rho, Hee Seok; Seo, Jae M.; Kim, Jin Seung

doi:10.3938/jkps.52.269

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…In the (y) direction (figure 1(b)), the incident beam is input on the SHG crystal with a cylindrical focus. Therefore, the original beam has a wide range of angular divergence [19,20]. Because the wavelength is phase-matched as a function of angle and due to the narrow phase-matching bandwidth of the thick crystal, the specified colors in the SHG signal can phase-match only on a certain output angle.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Experimental focusing in the characterization of ultrashort chirped pulses in a simplified device

Naghdi¹,

Sadeghi²,

Nadgaran³

et al. 2020

Laser Phys.

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Grating eliminated no-nonsense observation of ultrafast incident laser light e-fields is an experimental technique for the full characterization of ultrashort laser pulses. It requires the nonlinear conversion of broadband ultrashort optical pulses into their second harmonic generation (SHG) that is relatively tightly focused on a thick SHG crystal. In this paper, the laser focusing problem is experimentally presented and demonstrated in the measurements of 780 nm chirped pulses emitted from a Ti:sapphire oscillator. In this experimental study, it has been shown how the focusing effect can cause distortions in the trace of the chirped pulses. It is demonstrated that the measurement of broadband pulses requires that the beam have a wide angular divergence. Therefore, a tight focusing is essential. A long focal length leads to a smaller range of angles incident on the crystal causing an insufficient divergence angle. Finally, the ability of this device in the characterization of double and complicated chirped pulses is described. The broadening of complex chirped pulses after passing through a thick BK7 glass is measured and the group velocity dispersion of the BK7 glass is calculated as about 47.3 fs 2 mm −1 . Also the train of double chirped pulses created using a Michelson interferometer is measured and the spectral fringes marked by phase jumps are observed. The experimental results of the retrieved phases and intensities are in good agreement with independently measured data.

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Section: Experimental Methodsmentioning

confidence: 99%

“…Thus, a tight focusing is essential [21]. To have an effective SHG signal in the nonlinear crystal, the phase-matching condition must be fulfilled for all the spectral components existing in the original pulse [20].…”

Section: Experimental Methodsmentioning

confidence: 99%

Experimental focusing in the characterization of ultrashort chirped pulses in a simplified device

Naghdi¹,

Sadeghi²,

Nadgaran³

et al. 2020

Laser Phys.

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show abstract

“…At the output port of the frequency doubler, the second harmonic and the residual fundamental pulses were separated, and then used as the unknown and the reference pulses for the XFROG setup, respectively. The reference pulse was characterized by a simple SHG FROG apparatus named as GRENOUILLE [11,12] and passed through a variable time delay. Then the two pulses were focused by an aluminum coated, parabolic mirror (f=75 mm) onto a 100-μm-thick BBO crystal, and the generated sum frequency signal (around 262 nm) was recorded as a function of the relative delay between the pulses with a spectrometer.…”

Section: Uv Pulse Characterizationmentioning

confidence: 99%

Characterization of Supercontinuum and Ultraviolet Pulses by Using XFROG

Tsermaa

Yang

Myung-Whun

et al. 2009

Journal of the Optical Society of Korea

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We present cross-correlation frequency-resolved optical gating (XFROG) measurements of supercontinuum pulses generated by using a photonic crystal fiber (PCF), and ultraviolet (UV) pulses generated by frequency doubling of infrared ultra-short pulses. Since supercontinuum pulses have broad spectra, XFROG measurement typically requires using an extremely thin nonlinear crystal which has a thickness of sub-ten microns. Instead of using such a thin crystal, we employed a relatively thick crystal which was mounted on a galvanometer in order to achieve a phase-matching over the whole spectral bandwidth of the supercontinuum pulses by a crystal-dithering technique. Experimental results of the retrieved phase and intensity were in fair agreement with the independently measured data.

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High-sensitivity and high-speed measurements of ultrashort pulses as short as 74 fs at 1.9 µm using a GRENOUILLE device

Batov,

Voropaev,

Jafari

et al. 2024

Opt. Express

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Ultrashort laser pulse sources in the wavelength range of 1.8 to 2 µm have many potential applications including medicine, materials processing, and sensing. In the use of such lasers, a crucial task is to measure their pulse’s temporal intensity and phase. Such measurement devices are most useful when they are simple to build and operate and also have high speed and high sensitivity. The GRENOUILLE measurement device with few components, no moving parts, sensitivity of hundreds of picojoules, and measurement speed of hundreds of milliseconds, is commonly used to solve this problem at other wavelengths. In this paper, the measurement of ultrashort pulses by a GRENOUILLE device, developed using a silicon matrix sensor, for pulses in the wavelength range of 1.8 to 2 µm has been demonstrated. It is shown that ultrashort pulses with durations of 74 to 900 fs and a maximum spectral FWHM of 85 nm can be measured with this device. The recently developed ultra-reliable RANA approach was used for pulse retrieval from the measured traces. The device’s performance was validated by comparing its measurements with those obtained by the robust FROG technique.

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Design, Construction and Calibration of a GRENOUILLE, Single-Shot, Ultrashort-Pulse Measurement System

Cited by 3 publications

References 1 publication

Experimental focusing in the characterization of ultrashort chirped pulses in a simplified device

Experimental focusing in the characterization of ultrashort chirped pulses in a simplified device

Characterization of Supercontinuum and Ultraviolet Pulses by Using XFROG

High-sensitivity and high-speed measurements of ultrashort pulses as short as 74 fs at 1.9 µm using a GRENOUILLE device

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