title: Two-wavelength, passive self-injection-controlled operation of diode-pumped cw Yb-doped crystal lasers.
abstract: We demonstrate and investigate a peculiar mode of cw Yb3+-doped crystal laser operation when two emissions, at two independently tunable wavelengths, are simultaneously produced. Both emissions are generated from a single pumped volume and take place in either a single beam or spatially separated beams. The laser employs original two-channel cavities that use a passive self-injection-locking (PSIL) control to reduce intracavity loss. The advantages of the application of the PSIL technique and some limitations are shown. The conditions for two-wavelength multimode operation of the cw quasi-three-level diode-pumped Yb3+ lasers and the peculiarity of such an operation are carried out both theoretically and experimentally. The results reported are based on the example of a Yb3+:GGG laser but similar results are also obtained with a Yb3+:YAG laser. The laser operates in the 1023-1033-nm (1030-1040-nm) range with a total output power of 0.4 W. A two-wavelength, single longitudinal mode generation is also obtained.
authors.affiliation: Bureau National de Métrologie, Institut National de Métrologie, Conservatoire National des Arts et Métiers, 292 rue Saint Martin, Paris 75003, France.
authors.forename: Yann
authors.initials: Y
authors.lastname: Louyer
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Wallerand
authors.forename: Marc
authors.initials: M
authors.lastname: Himbert
authors.forename: Margarita
authors.initials: M
authors.lastname: Deneva
authors.forename: Marin
authors.initials: M
authors.lastname: Nenchev