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High speed modulation characteristics are investigated for directional emission microdisk lasers. The increase of modulation speed with the decrease of the radius is observed, and improvement of 3dB bandwidth is demonstrated at optical injection locking.
High-speed modulation characteristics are investigated for a 20-μm-side-length AlGaInAs/InP square resonator microlaser with a 1.5-μm-wide midpoint output waveguide. Single-mode operation with a maximum output power of 0.34 mW and a side mode suppression ration of 42 dB are realized for the microlaser at a temperature of 288 K. A 3-dB bandwidth of 14.9 GHz is obtained, and the eye diagrams at 15 and...
A novel structure of VCO-based quantizer for CT ΣΔ modulator is presented which can significantly improve the VCO linearity. Compared to the traditional methods, the proposed structure uses only one VCO in the system and it also maintains the intrinsic Dynamic Element Matching (DEM) function of the VCO-based quantizer. A first order CT ΣΔ modulator with the proposed quantizer is designed and simulated...
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