Study of migration in Cr:Er:YSGG using an upconversion light induced grating technique

✍ Scribed by M.A. Noginov; H.J. Caulfield; P. Venkateswarlu; M. Mahdi

• Book ID: 103960030
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 561 KB
• Volume: 5
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/0925-3467(95)00042-9

✦ Synopsis

An excitation migration over the level 411~/2 was studied in Cr:Er:YSGG laser crystal using an upconversion nonholographic light induced grating (LIG) technique. A long distance of migration ( = 1 /zm) was found. The diffusion coefficient was determined to be equal to 7 × 10 -7 cm2/s. This value was compared to that calculated in dipole-dipole approximation from the emission and absorption spectra overlap. The analysis shows, that excitation migration in Er:Cr:YSGG cannot be described in terms of dipole--dipole energy transfer, other possibilities are discussed.