Picosecond Laser Pulse Measurement

Tpl when excited by a broad bandwidth laser pulse that is tuned to the aunrs localized surface plasmon resonance.

Picosecond laser pulse measurement.

A pump probe technique that uses a femtosecond laser and ultra short gamma ray pulses is the most potential candidate. Despite the high velocity of light ultrashort pulses can also be very short in the spatial domain. The special symmetry properties of second harmonic generation at the surface of a gaas crystal are used in a technique which measures the shape of the fast pulses from a mode locked nd glass laser. The temporal evolutions of the picosecond pulse are measured when the picosecond laser pulse propagates in cs 2 nonlinear medium with different lengths which are presented in fig.

The microwave reflectivity of the ge is measured as a. Sapphire regenerative amplifier spectra physics spitfire ace 35f is used to generate the picosecond or femtosecond laser pulses with the central wavelength of 800 nm and repetition rate of 1 khz. Measure picosecond dura tions accurately in essence. The spatial width of a pulse in the propagation direction is given by the group velocity times the temporal pulse width.

The schematic diagram of the experimental setup for the spatiotemporal intensity measurement of the picosecond laser pulses by using the cup system is shown in fig. The pulses studied were found to have a full width at half power of between 4 and 6 picoseconds. Edinburgh instruments epl series of diode lasers have pulse widths down to 55 ps and are ideal for most scenarios. The microwave burst generated by a gaas switch activated by a 30 ps 1 06 lm optical pulse coming from nd y ag mode locked laser is gated by laser induced reflec tivity in a ge wafer.

A 1 ns pulse still has a length of 30 cm in air the shortest pulses which can be generated directly with a laser with a duration of roughly 5 fs have. Picosecond pulsed diode lasers are the most common light source for tcspc measurements. And huang chunning and takeda yasuhiro and liu yun abstractnote a compact optical correlator system that measures both the autocorrelation between two infrared ir lights and the cross. The nature of the.

Picosecond microwave pulse measurement. As the first stage of pulse width measurement however we examined a pulse width measurement technique in the picosecond range by using. Pulse width measurement in the sub picosecond to picosecond range. The technique is capable of measuring pulse widths at least as short as 4 10 13 sec.

The width of the cross correlation curve is about 75 ps when the length of cs 2 medium is 1 cm which is the same as the result of no cs 2 fig.