Topic
Ruby laser
About: Ruby laser is a research topic. Over the lifetime, 2474 publications have been published within this topic receiving 38933 citations. The topic is also known as: corundum laser & ruby rod.
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TL;DR: A highly sensitive method is presented for noninvasive defect analysis on thin structures with a Q-switched double-pulsed ruby laser with frequency doubling, where a focused laser pulse derived from the same ruby laser acts as a built-in synchronous excitation source for digital holographic interferometry.
Abstract: A highly sensitive method is presented for noninvasive defect analysis on thin structures with a Q-switched double-pulsed ruby laser with frequency doubling (347 nm). In our research we feature an all-optical arrangement, where a focused laser pulse derived from the same ruby laser (694 nm) acts as a built-in synchronous excitation source for digital holographic interferometry. The recordings are made with a CCD camera for capturing two holograms (two states of the specimen) corresponding to the two UV laser pulses with a short time separation (10–50 μs). Subtraction of the phase distribution in two digital holograms gives a fringe phase map that shows the change in deformation of the specimen between the recordings. The advantage of the proposed method is two fold. First, the use of a shorter wavelength results in a higher sensitivity. Second, owing to the induced synchronous built-in optical excitation, the specimen is not subjected to any external physical excitation devices. Experimental results are presented on identification and evaluation of defects in thin metal sheets.
50 citations
TL;DR: In this article, the construction and operating characteristics of a pressurized laser-triggered spark gap capable of switching voltages exceeding 10 kV with a risetime of less than 300 psec are described.
Abstract: The construction and operating characteristics of a pressurized laser‐triggered spark gap capable of switching voltages exceeding 10 kV with a risetime of less than 300 psec are described Other desirable features are its low delay and jitter times (∼1 nsec), the ability to deliver rectangular pulses with less than 10% ripple during and after the pulse, and its simplicity of construction The gap has been investigated using the output of either a single mode ruby laser or a mode‐locked neodymium‐glass laser as a trigger
50 citations
TL;DR: In this paper, the spectral distribution of the recombination radiation from silicon during and after excitation by a Q-switched ruby laser has been measured and analyzed and the interpretation assumes a third-order (Auger) recombination process and a simple parabolic band structure.
50 citations
TL;DR: In this paper, the power-versus-wavelength characteristic for a high-power, continuously tunable far-infrared source has been experimentally determined and compared with theory, using a Q-switched ruby laser as the pump and stimulated polariton scattering in the crystal LiNbO3 as the scattering mechanism.
Abstract: The power‐versus‐wavelength characteristic for a high‐power, continuously tunable far‐infrared source has been experimentally determined and compared with theory. Utilizing a Q‐switched ruby laser as the pump and stimulated polariton scattering in the crystal LiNbO3 as the scattering mechanism, peak powers outside the crystal of ∼ 3 W at 200 μ are observed without crystal damage. Linewidth measurements indicate a bandwidth of < 0.5 cm−1 for the radiation over the observed tuning range 66–200 μ.
50 citations
50 citations