Abstract
Deeply etched Bragg gratings were fabricated by focused ion beam (FIB) milling in KGdxLu1-x(WO4)2:Yb3+ to obtain photonic cavity structures. By optimizing parameters such as dose per area, dwell time and pixel resolution the redeposition effects were minimized and grating structures more than 4 µm in depth with an improved sidewall angle of ~5 degrees were achieved. Fabry-Perot microcavities were defined and used to assess the optical performance of the grating structures at ~1530 nm. An on-chip integrated laser cavity at ~980 nm was achieved by defining a FIB reflective grating and FIB polished waveguide end-facet. With this cavity, an on-chip integrated waveguide laser in crystalline potassium double tungstate was demonstrated.
Original language | Undefined |
---|---|
Pages (from-to) | 423-430 |
Number of pages | 8 |
Journal | Laser physics letters |
Volume | 8 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2011 |
Keywords
- EWI-19804
- crystalline potassium double tungstate
- Optical waveguides
- integrated cavity
- on-chip integrated laser
- Waveguide laser
- Focused ion beam nanostructuring
- IR-76407
- METIS-277582
- IOMS-APD: Active Photonic Devices