论文信息 - Harmonic distortion in 1.55-μm vertical-cavity lasers

Harmonic distortion in 1.55-μm vertical-cavity lasers

We investigate second and third order harmonics in the analog modulation response of InP-GaAs fused 1.55-/spl mu/m vertical-cavity lasers (VCLs). These devices exhibit the lowest threshold current as well as the highest temperature of continuous-wave operation of any electrically pumped long wavelength VCL. Near the resonance frequency, harmonic distortion is dominated by electron-photon interaction, and it is close to the distortion measured with in-plane lasers. At low frequencies, distortions seem to be dominated by carrier transport effects. At 1 GHz modulation frequency, we measure a maximum spur-free dynamic range of 64 dB Hz/sup 1/2/ for second-order harmonic distortion and 81-dB Hz/sup 2/3/ for third-order harmonic distortion.

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