Femtosecond cross-correlator dmphotonics.com

How good is the output from your femtosecond laser? The new third-order cross-correlator Rincon dmphotonics.com was specifically developed for measuring a wide array of output parameters from ultrafast laser systems including: contrast ratio of laser pulses, determining pulse pedestal, pre- and post-pulses, and amplified spontaneous emission in femtosecond systems. It also provides information about the third-order cross-correlation function of pulse intensity on a femtosecond scale and can be used for alignment of high power femtosecond lasers. A portion of the input pulse is converted to the second harmonic (SH) with a nonlinear crystal. A dichroic mirror reflects the SH and transmits the fundamental thus splitting the beam into the two arms of the crosscorrelator. The fundamental beam arm includes a retro reflector and delay-line. After passing through the delay-line the fundamental is recombined with the SH and focused into a DKDP or BBO crystal (depending on the input pulse wavelength). Mixing the fundamental and SH pulses in the nonlinear crystal produces non-collinear third harmonic generation (TH). By filtering out the fundamental and SH frequencies, the TH can be isolated. Measuring the TH signal as a function of the optical delay between the fundamental and SH pulses gives the third order cross correlation function. The third order cross-correlator is ideal for looking at the full range of output from amplified femtosecond laser systems. High temporal resolution over a long (close to 1 ns) window shows pulse features that are usually missed, giving the user a detailed and complete picture of the quality and stability of the output pulse parameters of their femtosecond laser system.

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http://www.dmphotonics.com/Femtosecond-Cross-Correlator/Contrast-ratio-of-las...

Category:

Science & Technology

Tags:

• laser
• pulse
• femtosecond
• amplified
• spontaneous
• emission
• prepulse
• postpulse
• Ti:Sapphire
• ultrafast
• dmphotonics.com