Autocorrelation and phase retrieval in the UV using two-photon absorption in diamond pin photodiodes

Opt Express. 2010 Mar 29;18(7):6945-56. doi: 10.1364/OE.18.006945.


We report on the utilization of the two-photon induced free carrier generation in a diamond pin-type photodiode to record fringe-resolved second-order autocorrelations of femtosecond pulses in the UV. Measurements in photovoltaic mode are performed at the second and third harmonic of a Ti:sapphire laser (lambda(0)=401 nm and lambda(0)=265 nm) with pulse energies down to about 2 nJ. The band gap of diamond of 5.5 eV sets a short wavelength limit at about 225 nm. Combined with the simultaneously recorded linear autocorrelation the spectral phase is reconstructed employing an iterative algorithm.

MeSH terms

  • Algorithms
  • Aluminum Oxide / chemistry
  • Lasers
  • Light
  • Normal Distribution
  • Optics and Photonics*
  • Photons
  • Spectrophotometry / methods*
  • Titanium / chemistry
  • Ultraviolet Rays


  • Titanium
  • Aluminum Oxide