Abstract
A novel cladding structure is proposed and analyzed for semiconductor quantum-well lasers to achieve a small vertical-beam divergence and a low threshold current density simultaneously. This cladding structure is designed to guide a wide optical mode but with a high peak intensity in quantum wells. The wide expansion of the optical mode results in a small beam divergence. In addition, the high optical intensity in quantum wells causes a low threshold current density. This novel cladding structure is optimized. The result shows that this type of cladding structures can achieve a beam divergence as small as 14.6° while the threshold current density remains small.
| Original language | English |
|---|---|
| Pages (from-to) | 1588-1595 |
| Number of pages | 8 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 32 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1996 |