Noise characteristics of GaInNAsSb 1.3 /spl mu/m-range VCSEL with optical feedback for isolator-free module

The reflection-noise characteristics of 1.3 /spl mu/m-range VCSELs are presented for the first time. It is theoretically and experimentally found that the increase of relaxation-oscillation-frequencies was effective for the sensitivity of optical feedback in single-mode long-wavelength VCSELs.