Autocorrelation Measurements of Green Picosecond Pulses Based on the Two-photon-induced Photocurrent in a Photodiode
ثبت نشده
چکیده
Two commercial photodiodes are tested for two-photon absorption at 520 nm. The results indicate strong linear absorption and negligible two-photon absorption at current power level. Two major types of error associated with autocorrelation measurement based on two-photon induced photocurrent were identified and investigated. Computer simulations show linear absorption can significantly distort the shape of the measured pulse, while misalignment between the reference and delayed beams will yield artificially shortened pulse. Another experiment was conducted to test the misalignment model. The result shows that there are multiple sources for misalignment, which need to be addressed in the future.
منابع مشابه
Autocorrelation Measurement of Femtosecond Optical Pulses Using Two-Photon-Induced Photocurrent in a Photomultiplier Tube
Very sensitive intensity autocorrelation measurement of 15-fs, 800-nm pulses from a Ti:sapphire laser has been achieved by using two-photon-induced photocurrent in a photomultiplier tube.
متن کاملDetermination of the Shape and Duration of Picosecond Light Pulses by Bleaching of Dyes
The knowledge of the duration and shape of picosecond light pulses is essential in time resolved picosecond studies. Various techniques for the measurement of picosecond pulse durations are summarized in recent reviews [1,2,3]. The most widely used methods are the two-photon-fluorescence technique (TPF) [4], the non-collinearly phasematched second harmonic generation (SHG) [5], the Kerr shutter...
متن کاملUltrafast photocurrent measurement of the escape time of electrons and holes from carbon nanotube p-i-n photodiodes.
Ultrafast photocurrent measurements are performed on individual carbon nanotube p-i-n photodiodes. The photocurrent response to subpicosecond pulses separated by a variable time delay Δt shows strong photocurrent suppression when two pulses overlap (Δt=0). The picosecond-scale decay time of photocurrent suppression scales inversely with the applied bias V(SD), and is twice as long for photon en...
متن کاملLow-temperature-grown GaAs coplanar waveguide single-photonÕtwo photon absorption autocorrelator
Previously, we have described a low temperature grown GaAs device that uses single-photon absorption to perform a carrier lifetime limited optical autocorrelation of picosecond optical pulses. In this article, we describe how this same device could be used to perform an autocorrelation of femtosecond optical pulses by utilizing two-photon absorption ~TPA!. Furthermore, we propose how to model a...
متن کاملPii: 0030-4018(79)90392-4
During the past decade the application of light pulses in the picosecond time domain has received increasing attention. In these investigations it is of primary interest to know the duration of the ultrashort light pulses. Two methods to measure the pulse duration have found frequent application: The two-photon fluorescence technique, TPF [I] and the streak camera [2]. The autocorrelation patte...
متن کامل