Waveguide lasers in ytterbium-doped tantalum pentoxide on silicon.

Spectroscopy of ytterbium-doped tantalum pentoxide rib waveguides on silicon

The design, fabrication and spectroscopic characterization of ytterbium-doped Ta2O5 rib waveguide are described. The waveguides are fabricated on silicon substrates and operate in a single mode at wavelengths above 970 nm. The peak absorption cross-section was measured to be 2.75 × 10 cm at 975 nm. The emission spectrum was found to have a broad fluorescence spanning from 990 nm to 1090 nm with...

Monolithic erbium- and ytterbium-doped microring lasers on silicon chips.

We demonstrate monolithic 160-µm-diameter rare-earth-doped microring lasers using silicon-compatible methods. Pump light injection and laser output coupling are achieved via an integrated silicon nitride waveguide. We measure internal quality factors of up to 3.8 × 105 at 980 nm and 5.7 × 105 at 1550 nm in undoped microrings. In erbium- and ytterbium-doped microrings we observe single-mode 1.5-...

Submicron optical waveguides and microring resonators fabricated by selective oxidation of tantalum.

Submicron tantalum pentoxide ridge and channel optical waveguides and microring resonators are demonstrated on silicon substrates by selective oxidation of the refractory metal, tantalum. The novel method eliminates the surface roughness problem normally introduced during dry etching of waveguide sidewalls and also simplifies fabrication of directional couplers. It is shown that the measured pr...

Channel Waveguide Lasers and Amplifiers in Single-Crystalline Ytterbium-Doped Potassium Double Tungstates

Preparation of Light-Emitting Ytterbium-Doped Tantalum-Oxide Thin Films Using a Simple Co-Sputtering Method

Light-emitting ytterbium-doped tantalum-oxide thin films were prepared using a simple co-sputtering method for the first time. Sharp photoluminescence peaks having a wavelength of around 980 nm were observed from films annealed from 700 ̊C to 1000 ̊C for 10 to 40 min. The strongest intensity of the 980-nm peak was obtained from a film deposited using three ytterbium-oxide pellets and annealed at ...