title: Energy transfer in Tm,Ho:KYW crystal and diode-pumped microchip laser operation.
abstract: An investigation of Tm-Ho energy transfer in Tm(5at.%),Ho(0.4at.%):KYW single crystal by two independent techiques was performed. Based on fluorescence dynamics measurements, energy transfer parameters P71and P28for direct (Tm→Ho) and back (Ho→Tm) transfers, respectively, as well as equilibrium constant Θ were evaluated. The obtained results were supported by calculation of microscopic interaction parameters according to the Förster-Dexter theory for a dipole-dipole interaction. Diode-pumped continuous-wave operation of Tm,Ho:KYW microchip laser was demonstrated, for the first time to our knowledge. Maximum output power of 77 mW at 2070 nm was achieved at the fundamental TEM00mode.
authors.forename: Sergey
authors.initials: S
authors.lastname: Kurilchik
authors.forename: Natali
authors.initials: N
authors.lastname: Gusakova
authors.forename: Maxim
authors.initials: M
authors.lastname: Demesh
authors.forename: Anatol
authors.initials: A
authors.lastname: Yasukevich
authors.forename: Viktor
authors.initials: V
authors.lastname: Kisel
authors.forename: Anatoly
authors.initials: A
authors.lastname: Pavlyuk
authors.forename: Nikolai
authors.initials: N
authors.lastname: Kuleshov