Abstract
Both square-shaped and circular-shaped flattop modes were experimentally demonstrated in extended-cavity broad-area VCSELs using aspheric feedback mirrors. These refractive aspheric mirrors were fabricated by electron-beam lithography on curved substrates. Excellent single-mode operation and improved power extraction efficiency were observed. The three-mirror structure of the VCSEL and the state-of-the-art fabrication of the aspheric mirror contribute to the superior VCSEL performance. The modal loss analysis using a rigid three-mirror-cavity simulation method is discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5549-5555 |
| Number of pages | 7 |
| Journal | Optics Express |
| Volume | 12 |
| Issue number | 22 |
| DOIs | |
| State | Published - Nov 2004 |