Delayed self-heterodyne linewidth measurement of VCSELs |
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| Authors: | W Schmid C Jung B Weigi G Reiner R Michalzik KJ Ebeling |
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| Affiliation: | Dept. of Optoelectron., Ulm Univ., Germany; |
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| 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. |
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