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Crystal Research and Technology |
Cryst. Res. Technol. 39,
230 (2004) - Abstract -
Optimisation of chromium doping in LiNbO3 single crystals
S. Kar, R. Bhatt, K. S. Bartwal, and V. K. Wadhawan
Crystal Growth Laboratory, Laser Materials Division, Centre for Advanced Technology, Indore-452 013, India
| Keywords | Czochralski method, lithium niobate, non-linear optical material, transmittance |
| PACS | 81.10.-h |
| DOI | 10.1002/crat.200310175 |
Growth of undoped and Cr doped (0.1, 0.25 and 0.5 mol % Cr2O3) congruently- melting-composition LiNbO3 single crystals by Czochralski technique is reported. Chromium doping was optimised to get crystals with potential for an integrated, broadband, tunable laser in the 700-1100 nm spectral range. Typical sizes of the grown crystals are 25-30 mm in diameter and 30-40 mm in length. Symmetrical and sharp conoscopy pictures confirm the optical homogeneity of the crystals. Optical transmission was recorded for both undoped and doped crystals. 70% transmittance was observed. The grown crystals have reasonably good laser damage threshold.
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