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 carbon disulfide cell and fiber-optic diffuser have been used in the beam from a pulsed ruby laser to reduce the spatial coherence of the beam and enable nearly speckle-free photographs of transient phenomena to be obtained as discussed by the authors.
28 citations
TL;DR: In this paper, a method of obtaining inverse Raman spectra over the range of frequency shifts ∼ 300-3500 cm−1 in liquids and solids in a time of ∼ 40 nsec is described.
Abstract: A method of obtaining inverse Raman spectra over the range of frequency shifts ∼ 300–3500 cm−1 in liquids and solids in a time of ∼ 40 nsec is described. The stimulating monochromatic radiation at 6940 A is provided by a giant‐pulse ruby laser; the background continuum is the short‐lived spontaneous fluorescence of rhodamine B or 6G excited by second‐harmonic radiation (3470 A) produced in KDP from a small part of the main laser beam, thus ensuring simultaneous irradiation of the sample by both beams.
27 citations
TL;DR: Explosive crystallization of amorphous Si was studied in a new heat-flow regime using long pulse (45 ns full width at half maximum) ruby laser irradiation.
Abstract: Explosive crystallization of amorphous Si is studied in a new heat‐flow regime using long pulse (45 ns full width at half‐maximum) ruby laser irradiation. In this regime, previously unobserved phenomena are found. Nucleation of crystalline Si is observed while the amorphous phase is melting at high (m/s) velocity and epitaxy from the underlying crystalline substrate is observed even under conditions for which the amorphous Si is never at any instant fully melted. These measurements, combined with previous measurements using short pulse irradiation, lead to development of a more complete model of explosive crystallization.
27 citations
TL;DR: In this article, a multiply Q -switched ruby laser is used to produce the series of coherent light pulses for hologram exposure, and image separation of different holograms is achieved by spatial multiplexing using a rotating disk with apertures directly in front of the holographic plate.
27 citations
TL;DR: The lifetime of the photoexcited state of the hydrated electron in liquid water at room temperature is shown to be less than 6 × 10−12 seconds following photoexcitation at 694 nm, a wavelength very close to λmax as mentioned in this paper.
Abstract: The lifetime of the photoexcited state of the hydrated electron in liquid water at room temperature is shown to be less than 6 × 10−12 sec following photoexcitation at 694 nm, a wavelength very close to λmax. This has implications concerning the nature of the optical transition involved and may suggest that the absorption band is a photoionisation efficiency profile rather than an electronic transition to a bound excited state. The absorbance of hydrated electrons (produced by uv flash photolysis) was measured at very high light fluxes using a Q‐switched ruby laser under conditions where cryptocyanine and methylene blue solutions showed marked nonlinear absorption due to saturation of optical transitions. Whereas the dye solutions showed diminished absorbance and a shortening of the laser pulse at high light intensities, hydrated electrons gave identical absorbance at all intensities, varied over 7 orders of magnitude, up to 200 photons per hydrated electron per cm2 of the light beam.
27 citations