title: Emission properties and CW laser operation of Pr:YLF in the 910 nm spectral range.
abstract: The polarized emission spectra for the3P0→1G4emission transition of the Pr3+ion around 910 nm in the Pr3+:LiYF4(Pr:YLF) laser crystal were registered and calibrated in unit of cross sections for the first time. Continuous-wave (CW) laser operation is demonstrated at 915 nm in π polarization by pumping the crystal with an optically pumped semiconductor laser (OPSL) at 479.2 nm. An output power of 218 mW is thus obtained with a laser slope efficiency of about 24% for an output coupler (OC) transmission of 1.9%. CW laser operation is also demonstrated at 907 nm in σ polarization by using a thin plate oriented at Brewster angle. An output power of about 89 mW with a slope efficiency of about 10% is then obtained for an OC transmission of 0.8%.The round-trip cavity losses are estimated for different experimental cavity configurations to be about 1% and the typical beam quality M2factors measured in the transverse x and y directions are found equal to about 1.07 and 1.04, respectively. Finally, we also report on a double laser wavelength operation by using an OC with a transmission of about 0.05%, such effect resulting from joint-etalon effects inside the cavity.
authors.forename: Z P
authors.initials: ZP
authors.lastname: Cai
authors.forename: B
authors.initials: B
authors.lastname: Qu
authors.forename: Y J
authors.initials: YJ
authors.lastname: Cheng
authors.forename: S Y
authors.initials: SY
authors.lastname: Luo
authors.forename: B
authors.initials: B
authors.lastname: Xu
authors.forename: H Y
authors.initials: HY
authors.lastname: Xu
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Luo
authors.forename: P
authors.initials: P
authors.lastname: Camy
authors.forename: J L
authors.initials: JL
authors.lastname: Doualan
authors.forename: R
authors.initials: R
authors.lastname: Moncorgé
mesh_terms: D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D053844:Lasers, Solid-State