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: In this paper, the effects of self-phase modulation, stimulated Raman scattering, and parametric four-photon interaction in an 8-μm core fibre of 4 m length with the effect of selective spectral attenuation in a ruby rod resulted in a rather smooth spectra extending from 685 nm to 830 nm (spectral width ≈ 2300 cm-1).
Abstract: Picosecond light pulses of a passively mode-locked ruby laser (pulse duration Δt
L≈35 ps) are spectrally broadened in optical fibres of core diameters from 4 μm to 600 μm. Combining the effects of self-phase modulation, stimulated Raman scattering, and parametric four-photon interaction in an 8-μm core fibre of 4 m length with the effect of selective spectral attenuation in a ruby rod resulted in rather smooth spectra extending from 685 nm to 830 nm (spectral width ≈2300 cm-1).
41 citations
TL;DR: Amplified spontaneous emission (travelling-wave lasing) was achieved for a set of 18 poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene-vinylene) (MEH-PPV) related arylenevinylene copolymers, a part of which substituted with additional phenyl groups at the vinyl double bond.
Abstract: Amplified spontaneous emission (travelling-wave lasing) was achieved for a set of 18 poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene-vinylene) (MEH-PPV) related arylene-vinylene copolymers, a part of which substituted with additional phenyl groups at the vinyl double bond. Wave-guiding neat thin films on glass substrates were used. The samples were transversally pumped with single second harmonic pulses of a mode-locked ruby laser (wavelength 347.15 nm). Travelling-wave emission occurred in the wavelength region between 485 and 650 nm. Repeat unit based absorption cross-section spectra, normalized fluorescence quantum distributions, and amplified spontaneous emission spectra are presented. Ground-state absorption cross-sections at the wavelengths of peak amplified emission are extracted from effective gain length measurements. Effective stimulated emission cross-sections are derived from pump pulse energy densities necessary for optical narrowing.
41 citations
TL;DR: Changes in structure or function of subcellular structures, sol-gel state, and growth rates were noted in single cells irradiated with microbeam laser.
Abstract: The development of the microbeam laser has made it possible to irradiate selected zones or subcellular structures within the cell. If sublethal pulses of irradiation are administered to parts of single cells, various changes in such cells can be observed. The reaction of biological material appears to be the denaturation of cellular proteins. Other changes also include coagulation, or the complete destruction, of a structure or zone that had been visible in the cell prior to irradiation. The object of our research has been to irradiate parts of single cells without causing the death of the cell. Changes in structure or function of subcellular structures, sol-gel state, and growth rates were noted. Amoebaproteus and Nitella axillaris were used in the present studies. Instrumentation
40 citations
TL;DR: An unpredicted wavelength dependence of the injury threshold for single Q-switched pulses is demonstrated and there is no complete or obvious explanation for the significant variations of threshold with small changes in wavelength.
Abstract: Thresholds for laser chorioretinal injury in the red end of the visible spectrum and the near-infrared (IR-A) spectral regions are presented. An unpredicted wavelength dependence of the injury threshold for single Q-switched pulses is demonstrated. Four lasers were used to determine thresholds at 40 wavelengths between 532 nm and 1064 nm: a ruby laser, a neodymium:YAG-pumped dye laser, an erbium:YLF laser and an alexandrite laser. Despite many careful and repeated efforts to determine a cause for the variation due to possible variations in the lasers or other aspects of the experimental technique and due to biological absorption properties of the eye, there is no complete or obvious explanation for the significant variations of threshold with small changes in wavelength. The implications of these findings for laser safety standards are presented.
40 citations
TL;DR: In this paper, a pulsed-laser radiation was used to grow homoepitaxial p-n junctions in silicon, and perfect epitaxial layers with good electrical characteristics and controlled dopant profiles can be achieved.
Abstract: We have used pulsed‐laser radiation to grow homoepitaxial p‐n junctions in silicon. Doped amorphous silicon was deposited on (100) and (111) silicon substrates and annealed with a Q‐switched ruby laser. By this technique, perfect epitaxial layers with good electrical characteristics and controlled dopant profiles can be achieved. The technique can potentially be competitive with or replace ion implantation for many semiconductor‐device applications.
39 citations