Delayed self-heterodyne linewidth measurement of VCSELs |
| |
Authors: | W. Schmid C. Jung B. Weigi G. Reiner R. Michalzik K.J. Ebeling |
| |
Affiliation: | Dept. of Optoelectron., Ulm Univ., Germany; |
| |
Abstract: | We report on high-resolution linewidth measurements of proton-implanted InGaAs-GaAs VCSELs employing the delayed self-heterodyne method. Devices with 16-/spl mu/m active diameter exhibit record low linewidths of 20 MHz and 4-MHz residual linewidth. The linewidth enhancement factor is accurately determined from the ratio of induced phase to amplitude modulation indexes. |
| |
Keywords: | |
|