Fig 3 - uploaded by Kenju Otsuka
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(a) Typical wavelength spectrum and (b) the input-output characteristics of the LNP laser. In ( b), single-mode oscillations on different transitions were obtained under a tight pump-beam focusing condition by use of a microscopic objective lens with a 403 magnif ication.
Source publication
1.5-mum emissions from Nd:YAG, Nd:YVO(4), and LiNdP(4) O(12) microchip lasers pumped by laser diodes have been observed. These coherent emissions are attributed to the effect of high-energy modified lattice vibration owing to the existence of Nd ions as well as to stimulated intracavity Raman scattering enhanced by the microchip configuration. A fo...
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Citations
... In sheet-pumped LNP lasers, on the other hand, complicated symmetric patterns which resemble bouncing-ball modes in quantum billiard systems 6) were observed instead of OHM, in which emission profiles were the same for near-and far-field patterns. Additional support for the skew ray is that the stimulated Stokes-like emission at 1560 nm observed in the 1-mm-thick Nd:YVO 4 FPM lasers 7,8) was not observed in the OHM operations. This result is reasonable because the phonon-assisted interaction between 1064 and 1560 nm fields does not occur due to the dispersion-induced path difference among the two fields in OHM operations. ...
We observed a highly efficient self-induced “oval hollow” mode operation in a Fabry-Perot microchip solid-state laser under strongly asymmetric “sheetlike” end-pumping. This new class of microresonator lasing mode features a hollow emission near-field pattern with a dark spot inside and a narrow unidirectional line-shape far-field pattern with a uniform intensity distribution.
Stokes-like IR (1560-1600-nm) emissions, which have been observed in laser-diode- (LD-) pumped microchip Nd-doped lasers, are re-examined experimentally. Dependences of IR emissions on pump wavelengths, pump densities, and operating temperatures are studied. The response of IR emissions to coherent probe-beam injection is investigated by use of a tunable LD light source. Optical phonons emitted through Auger recombination processes that result from LD high-density pumping are proposed to induce resonant intracavity stimulated phonon-sideband emissions.
We systematically studied dynamic effects in Nd-doped Y3Al5O12 (YAG) ceramic lasers having different Nd concentrations. A variety of dynamic instabilities, including square wave periodic pulsations, were found to take place due to the increased grain boundaries in highly-doped samples.
Stokes-like IR (1560–1600-nm) emissions, which have been observed in laser-diode- (LD-) pumped microchip Nd-doped lasers, are re-examined experimentally. Dependences of IR emissions on pump wavelengths, pump densities, and operating temperatures are studied. The response of IR emissions to coherent probe-beam injection is investigated by use of a tunable LD light source. Optical phonons emitted through Auger recombination processes that result from LD high-density pumping are proposed to induce resonant intracavity stimulated phonon-sideband emissions.
