Abstract
We demonstrate a surface grating loaded VCSEL showing high power, good beam quality and stable single mode operation. In the struc- ture, a single slow light mode propagating laterally along the long cavity of an oxide VCSEL can be selected thanks to the surface Bragg-grating. Experimental results of spectrum, L/I characteristics and beam quality with different device lengths are presented. A single mode power of over 80mW is realized with a narrow diffraction-limited divergence angle of 0:15° for a VCSEL with an oxide aperture of 4 μmμ500 μm under CW operation. A higher single mode power is expected through extending the device length with the proven scaling law.
Original language | English |
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Journal | IEICE Electronics Express |
Volume | 18 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2021 |
Externally published | Yes |
Keywords
- High power
- Single mode operation
- Slow light
- VCSELs