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Combine the DAZZLER pulse shaper and the WIZZLER pulse measurement system,
and get the best out of both! |
The WIZZLER system provides measurements of:
 spectral phase,
spectral amplitude,
intensity dependent pulse duration
of femtosecond laser systems with amplified bandwidth (FWHM) ranging from 15nm to 50nm (i.e. transform limited durations ranging from 20fs to 80fs).
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 When coupled to a DAZZLER pulse shaper located upstream of the amplifier,
the Wizzler automatically generates the phase file suited for automated pulse compression
to achieve Fourier Transform Limit duration. |
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It is important to notice that one often verifies the quality of the ultrafast pulse compression by comparing it to the Fourier Transform limit pulse duration.
Fastlite does so in comparing the variance of the compressed pulse to the variance of its Fourier Tranform Limited duration
over a wide temporal window, as a way to get some insights about the ultrafast pulse compression quality at 30-40dB from the pulse peak intensity.
(also refer to [3] Moulet, A; Grabielle, S; Cornaggia, C; Forget, N; Oksenhendler, T "Single-shot, high-dynamic-range measurement of sub-15 fs pulses by self-referenced spectral interferometry", Optics Letters, Vol. 35 Issue 22, pp.3856-3858 (2010))
The below figures (Fig 1. to Fig 3.) display the measured time dependent intensity profiles versus the Fourier Transform time profile
of a Full Width Half Max 12 fsec pulse duration.
The variances (σ) of the measured time intensities over a +-400fsec time window are respectively 34fsec for Fig 1., 27fsec for Fig 2. and 21 fsec for Fig 3.,
thus illustrating the importance of the variance parameter to characterize the quality of the femtosecond pulse compression.
The Fourier Transform Limit pulse duration variance is 20.5fsec. |
The Figure 3 above demonstrates the single shot WIZZLER measurement with a dynamic range higher than 40dB.
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