title: Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms.
abstract: We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power of 40 mW and another laser diode for amplifying the laser power up to 220 mW by injection locking. The systematic method for optimization of our injection locking can also be applied to high power light sources at any other wavelengths. Our system does not depend on complex nonlinear frequency-doubling and can be made compact, which will be useful for providing light sources for laser cooling experiments including transportable optical lattice clocks.
authors.affiliation: Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro-ku, Tokyo 152-8550, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Hosoya
authors.affiliation: Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro-ku, Tokyo 152-8550, Japan.
authors.forename: Martin
authors.initials: M
authors.lastname: Miranda
authors.affiliation: Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro-ku, Tokyo 152-8550, Japan.
authors.forename: Ryotaro
authors.initials: R
authors.lastname: Inoue
authors.affiliation: Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro-ku, Tokyo 152-8550, Japan.
authors.forename: Mikio
authors.initials: M
authors.lastname: Kozuma