InAs/InP quantum dash based mode locked lasers for 60 GHz radio over fiber applications

Material growth optimization of InAs/InP quantum dashes has allowed the achievement of single section mode-locked lasers with improved performance in terms of modal gain > 40 cm
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, average output power > 40 mW, radio frequency linewidth as narrow as 10 kHz together with a direct modulation bandwidth over 7 GHz. These devices were subsequently investigated as potential optical transmitters for mm-wave generation, namely 60 GHz radio-over-fiber applications. Relatively low error vector magnitude errors of ∼ 11 % as well as high extinction ratio > 25 dB shows the potential of these devices for > 2.5 Gb/s short distance indoor communications.