A study of high-power laser effects in dielectrics using multiframe picosecond holography

Tschudi, T.; Yamanaka, C.; Sasaki, T. K.; Yoshida, Kōji; Tanaka, K. A.

doi:10.1088/0022-3727/11/2/015

Cited by 13 publications

(6 citation statements)

References 3 publications

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“…Techniques developed to date can be grouped into four primary classifications: a single multiply Q-switched laser method [29,30], a 'flat' optical delay cavity [31 ], a stacked beamsplitter arrangement [32], and the use of multiple lasers [33][34][35]. One of the key areas of this advance is that of time-resolved holography, also known as 'cine-holography', in which a time series of holograms are recorded in rapid sequence.…”

Section: Time Resolved Holographymentioning

confidence: 99%

Study of crack-tip motion in dynamic fracture by microscopic time-resolved holography

Steckenrider

Wagner

1995

Int J Fract

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A novel laser system has been designed and developed for the time-resolved holographic analysis of dynamic crack propagation in thin (150 #m) glass plates. The system provides a frame-to-frame resolution of from 28.3 to 161.6 ns, with a spatial resolution of better than 25 #m. Holographic analyses were conducted using both diffuse and direct laser illumination, demonstrating a broad range of applicability for this method. A series of specimens with pre-crack lengths of from 3.5 to 10.5 mm were tested using various pre-load levels and crack-growth-initiating explosive sizes. All specimens exhibited similar dynamic fracture behavior, particularly those outside of the region of shock of the initiating explosive (those of the longer pre-crack set). A best-fit to the theoretical prediction for mode I crack growth revealed a good match to the case for a specimen 'overloaded' by 64 percent. However, no variation with applied load was evident, indicating that an immediate acceleration to a velocity of ~ 1200 m/s (near the empirically determined terminal velocity) was the more plausible fit. Since the terminal velocity was approximately the same for all specimens, this investigation also demonstrated that the terminal velocity is independent of crack-tip stresses, even for the most extreme explosive pulses.

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Section: Time Resolved Holographymentioning

confidence: 99%

Study of crack-tip motion in dynamic fracture by microscopic time-resolved holography

Steckenrider

Wagner

1995

Int J Fract

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“…Multiple frames can be stored and reconstructed separately using multiplexing techniques. Previous work has focused on spatial multiplexing 2,3,4 where holograms are recorded at different locations of the recording medium. Pulsed holograms have also been angularly multiplexed taking advantage of the thickness of the recording medium.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2002

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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.

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“…A sequence of holograms, i.e., a holographic movie, can be recorded by use of multiplexing techniques. In previous research, recording techniques included spatial 2,3 and angular multiplexing. 4,5 In recording a fast holographic movie, the sensitivity and response speed of the recording material are two very important issues.…”

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confidence: 99%