<title>Holographic techniques for recording ultrafast events</title>

Abstract

In this paper we report on a holographic method used to record fast events in the nanosecond time scale. Several frames of the expansion of shock waves in air and in a polymer sample are recorded holographically in a single shot experiment, using a pulse train generated with a single pulse from a Q-switched Nd:YAG laser. The time resolution is limited by the laser pulse width, which is 5.9 ns. The different frames are recorded on the holographic material using angle multiplexing. Two cavities are used to generate the signal and reference pulses at different angles. We also present a method in which the recording material is replaced by a CCD camera. In this method the holograms are recorded directly on the CCD and digitally reconstructed. The holograms are recorded on a single frame of the CCD camera and then digitally separated and reconstructed.

Simulation and fabrication of one dimensional terahertz photonic filter

“…Using quasi-coaxial holography combined with amplitude splitting and coding of bearing angle realized the four-frame holography of the nonlinear process with femtosecond time resolution, as shown in Figure 4, may be the first of time domain holography in the atomic time scale [57,58].…”

Implementing techniques of holography-based multiframe extreme high-speed photography

“…As a holographic EHSP example reported in Ref. 12, a laser that can generate a laser pulse with 200-fs width and a stepped mirror with 1 mm step-difference were used, so the exposure time is 200 fs, the framing time is 6.6 ps, and the photographic rate is 1.5×10 11 pps.…”