Two-photon absorption of Nd laser radiation in GaAs
The two-photon absorption coefficient of GaAs at 1.32 μm is found to be 0.033 ± 0.015 cm/MW. This value was obtained from transmission measurements employing a Q-switched Nd–YAG laser and an improved theoretical analysis taking into account fluctuations and the Gaussian pulse shape. Evidence of ther...
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| Veröffentlicht in: | Applied physics letters 1973-09, Vol.23 (5), p.243-244 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The two-photon absorption coefficient of GaAs at 1.32 μm is found to be 0.033 ± 0.015 cm/MW. This value was obtained from transmission measurements employing a Q-switched Nd–YAG laser and an improved theoretical analysis taking into account fluctuations and the Gaussian pulse shape. Evidence of thermal self-focusing was seen in samples with linear absorption coefficients of order 1 cm−1 or larger. |
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| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.1654874 |