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Stimulated scattering in solids and new Raman lasers in near-infrared and visible regions
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2003 |
| Abstract | The frequency shifts based on stimulated Raman scattering SRS in Raman-active materials are experimentally investigated. A mode-locked Nd:YAG ps-single-pulse laser is used to study the Stokes and anti-Stokes shifting under single pass and resonant conditions. This leads to generation of new solid-state Raman lasers. First part of this work is the generation of SRS in inorganic, organic crystals and glassy materials. The laser radiation shifts to Stokes lines with frequency smaller than the laser frequency and anti-Stokes lines with frequency higher than the laser frequency. BiB3O6, Bi4Ge3O12, Bi4Si3O12, AANP, C13H10O, GuZN-III and 4 ́-Nitrobenzylidene-3-Acetamino4-Methoxyaniline crystals are investigated as a new efficient shifter crystals. They combine SRS and second harmonic generation SHG nonlinear frequency conversion in the same crystal and allow to efficiently shift the Nd:YAG laser emission to discrete lines in the visible. Self-SHG is observed in a C16H15N3O4 crystal, SHG of the first ( S1 = 1280.4 nm) and second ( S2 = 1606.9 nm) Stokes lines generate SHG = 640.2 nm and SHG = 803.4 nm, respectively. This is the first observation of the self-SHG effect in organic single crystals. Second part of this work is the investigation of Raman lasers to reach new near-IR wavelengths and conversion to the visible. Resonant SRS to the second-Stokes line and subsequent SHG with a doubler crystal extends the Nd:YAG wavelengths to the red spectral region. Second-Stokes Raman-lasers with PbWO4 and Ba(NO3)2 crystals at wavelengths 1316.6 nm and 1369 nm, respectively are available. Raman Stokes lines in IR at 1316.6 and 1369 nm are converted to the visible spectral region at 658 nm and 685 nm wavelengths with KD*P frequency doubling conserving the good Stokes beam quality. Finally, Solid-state Raman laser with wavelength shorter than the pump beam is available. Firstanti-Stokes Ba(NO3)2 Raman laser at wavelength 957 nm is demonstrated for the first time. For generation first-anti-Stokes Raman laser nanosecond Nd:YAG laser at 1064 nm wavelength with pulse duration 8-9 ns was used. |
| File Format | PDF HTM / HTML |
| DOI | 10.14279/depositonce-797 |
| Alternate Webpage(s) | https://depositonce.tu-berlin.de/bitstream/11303/1094/1/Dokument_4.pdf |
| Alternate Webpage(s) | https://doi.org/10.14279/depositonce-797 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
