Laser experiments were performed on buried, ridge-type channel waveguides in an 8 at. % thulium-doped, yttrium-gadolinium-lutetium codoped monoclinic double tungstate. A maximum slope efficiency of 70% and output powers up to 300 mW about 2.0 μm were obtained in a mirrorless laser resonator, by pumping with a Ti:sapphire laser near 800 nm. To the best of our knowledge, this result represents the most efficient 2 μm channel waveguide laser to date. Lasing is obtained at various wavelengths between 1810 nm and 2037 nm.
- IOMS-APD: Active Photonic Devices
- Thin film devices and applications
- Infrared and far-infrared lasers
- Integrated optics materials
van Dalfsen, K., Aravazhi, S., Grivas, C., García Blanco, S. M., & Pollnau, M. (2012). Thulium channel waveguide laser in a monoclinic double tungstate with 70% slope efficiency. Optics letters, 37(5), 887-889. https://doi.org/10.1364/OL.37.000887