A Second-Order Feedforward Optical Power Control Scheme for Automotive VCSEL Drivers

This letter presents a feedforward optical power control scheme for automotive 150-Mb/s vertical-cavity surface-emitting laser (VCSEL) transmitters. The bias current exhibits a second-order dependence upon temperature, while the modulation current is provided with a piecewise linear compensation of...

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Veröffentlicht in:IEEE photonics technology letters 2010-11, Vol.22 (22), p.1683-1685
Hauptverfasser: Xin Yin, Bauwelinck, J, Xing-Zhi Qiu, Vandewege, J
Format: Artikel
Sprache:eng
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Zusammenfassung:This letter presents a feedforward optical power control scheme for automotive 150-Mb/s vertical-cavity surface-emitting laser (VCSEL) transmitters. The bias current exhibits a second-order dependence upon temperature, while the modulation current is provided with a piecewise linear compensation of temperature variations. The resulting VCSEL modulation performance was analyzed in detail and experimentally validated. Over the harsh automotive temperature range from -40°C to 105°C, a high extinction ratio was maintained despite very tight tolerances on pulsewidth distortion (PWD); the variation of the emitted optical power was measured to be less than 1.2 dB, while maintaining an extinction ratio better than 12 dB and a PWD less than ±2%.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2010.2075924