NONLINEAR ABSORPTION OF LASER-LIGHT IN BI12GEO20 SINGLE-CRYSTALS

Authors
TAHERI B HOLMSTROM SA POWELL RC SONG JJ MUNOZ A FOLDVARI I PETER A
Citation
B. Taheri et al., NONLINEAR ABSORPTION OF LASER-LIGHT IN BI12GEO20 SINGLE-CRYSTALS, Optical materials, 3(4), 1994, pp. 251-255
Citations number
28
Categorie Soggetti
Material Science
Journal title
Optical materials → ACNP
ISSN journal
09253467
Volume
3
Issue
4
Year of publication
1994
Pages
251 - 255
Database
ISI
SICI code
0925-3467(1994)3:4<251:NAOLIB>2.0.ZU;2-5
Abstract
Two-photon absorption (TPA) at 532 nm was investigated in BGO (Bi12GeO 20) single crystals using a 16 ps pulse width Nd:YAG laser. The TPA co efficient was measured to be 2.2-2.6 cm/GW for undoped BGO. This sugge sts that nonlinear absorption plays a significant role in the carrier generation processes induced by short laser pulses. The TPA coefficien t for heavily Al-doped EGO is only slightly smaller (1.9-2.3 cm/GW) th an that of the undoped EGO. This result has specific importance since linear absorption in the visible wavelength region is strongly suppres sed by Al doping.