Ruby laser repetitively pulsed at rates up to 500 kHz containing etalons and amplification

Goldey, Charles L.; Grace, Jeffrey M.; Nebolsine, Peter E.; Huntley, Jonathan M.

doi:10.1117/12.308666

Cited by 2 publications

(2 citation statements)

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“…The energy per pulse for this low energy system was increased x2.5 to about 12 mJ per pulse. 4 Demonstration of successful operation with amplification is covered in more detail in the following section on the high energy laser system.…”

Section: Amplification Of Pulsesmentioning

confidence: 99%

Repetitively pulsed ruby lasers as light sources for high-speed photography

Grace

1998

Opt. Eng

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Two ruby laser systems employing multiple Q-switching technology have been developed to provide ruby laser light for high-speed photography. Potential applications include ballistics and flow visualization as well as non-destructive test evaluation using laser imaging diagnostics such as photography, holography, and various interferometric techniques. The laser systems produce more than 50 pulses at repetition rates up to 500 kHz with nearly constant pulse-to-pulse energies. One system, based on a commercial laser, provides multiple pulses of holographic quality light with individual pulse energies on the order of 10 mJ, pulse widths of 50 ns, and a pulse train length of more than 300 µs. A new ruby laser system has been developed to provide higher pulse energies, on the order of 350 mJ per pulse, with 10 ns pulse widths and 140 µs pulse train length. The method for multiple Q-switching by modulating the Pockels cell's quarter wave voltage and the formation of an individual Q-switched pulse has been investigated. The energy within the individual pulses formed in the oscillator cavity has been successfully increased by propagating through an amplification section, without degradation of the temporal or pulse-to-2 pulse amplitude stability. Etalons for longitudinal mode selection and an iris for spatial mode selection have been incorporated into the lower energy system and an image of a reconstructed hologram is presented. Camera capabilities and the implications of higher pulse energies have also been investigated.

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Section: Amplification Of Pulsesmentioning

confidence: 99%

Repetitively pulsed ruby lasers as light sources for high-speed photography

Grace

1998

Opt. Eng

Self Cite

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“…Here time zero (To) is referenced to the firing of the flashlamps and time one (T1) is referenced to the rise of the first Pockels cell high voltage pulse. Time one (T1) was used for the laser reference time because the laser pulse is defined by the falling edge of the Pockels cell high voltage pulse 8 . All laser pulses can be referenced to the start of the Pockels cell pulsing with high accuracy and precision.…”

Section: Integration Timing Diagramsmentioning

confidence: 99%

MHz class repetitively Q-switched, high-power ruby lasers for high-speed photographic applications

Nebolsine

Snyder

Grace³

2001

39th Aerospace Sciences Meeting and Exhibit

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Ruby laser repetitively pulsed at rates up to 500 kHz containing etalons and amplification

Cited by 2 publications

References 0 publications

Repetitively pulsed ruby lasers as light sources for high-speed photography

Repetitively pulsed ruby lasers as light sources for high-speed photography

MHz class repetitively Q-switched, high-power ruby lasers for high-speed photographic applications

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