Autocorrelation and phase retrieval in the UV using two-photon absorption in diamond pin photodiodes.
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.
Kleimeier
Nils Fabian
NF
Westfälische Wilhelms-Universität Münster, Physikalisches Institut, 48149 Münster, Germany.
Haarlammert
Thorben
T
Witte
Henrik
H
Schühle
Udo
U
Hochedez
Jean-Francois
JF
BenMoussa
Ali
A
Zacharias
Helmut
H
D000465:Algorithms; D000537:Aluminum Oxide / Q000737:chemistry; D007834:Lasers; D008027:Light; D016011:Normal Distribution; D055095:Optics and Photonics; D017785:Photons; D013053:Spectrophotometry / Q000379:methods*; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays
D014025:Titanium; D000537:Aluminum Oxide