Experimental study demonstrates a 30 GHz modulation bandwidth in an 850 nm vertical-cavity laser, highlighting its suitability for high-speed, low-power optical interconnects.
A high‐speed and energy‐efficient oxide‐confined 850 nm vertical‐cavity surface‐emitting laser (VCSEL) for optical interconnects is presented. A record‐high modulation bandwidth of 30 GHz is reached for a 3.5 µm oxide aperture VCSEL, with 25 GHz bandwidth already at a bias current of 1.8 mA. The high bandwidth at low currents enables energy‐efficient transmission with a dissipated heat energy in the VCSEL of <100 fJ/bit at 25, 40 and 50 Gbit/s.
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Haglund et al. (2015) studied this question.
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