The optimum conditions of excitation in a two-spool laser are determined, in which the pumping of a solid laser on the
basis of nanoporous glass - polymer composite with the inserted dyes is made by a laser on dyes emission with a lamp
pumping of microsecond duration, which provides overlapping of a broad spectral range with laser momentums with
energy up to 500 mJ at the duration of 1 mcs and the divergence of 1 millirad and the increase of the radiance in 140-700
times.
The efficiency of splitting of renal rocks is studied with the usage of four schemes of the laser construction, generating
momentums of microsecond duration. The dependence of deleting of the concrete renal rock substance on spectral content
of radiation of microsecond duration in the range of 460-1064 nm has been established.
A polymer-filled nanoporous glass composite (PFNPG) has been shown recently to be a very attractive host material for solid-state dye lasers. In particular, a high-conversion (lasing) efficiency, up to 70%, has been demonstrated for pyrromethene-family dyes impregnated to PFNPG, in a visible spectral range at 2-nd harmonic nanosecond pulse duration Nd:YAG laser excitation. For development of PFNPG-based dye lasers it is important to investigate lasing characteristics of this type matrices at various excitation (pump) wavelengths. In this context we have investigated the conversion efficiency, η, and emission spectra, fem, of phenolemine 512 (Ph 512) and pyromethene 580 (PM 580) dyes impregnated into PFNPG, at excitation wavelengths, λp, varied in a range of their main absorption bands. A microsecond pulse duration liquid solution dye laser was used in our experiments as a pump source. The conversion efficiency, η=32% and 47%, has been observed at λ=525 nm for Ph 512 and PM 580 respectively with output energy as high as 250 mJ. "Anomalous" dependencies of η and fem upon λp have been revealed for both dyes. In particular, two-frequency lasing has been observed for Ph 5 12 at λ=535 nm. Mechanism of the lasing anomalies is supposed to be related to photoinduced absorption in lasing dyes.
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