Micro-transfer-printed Membrane DR Lasers on Si Waveguide Modulated with 50-Gbit/s NRZ Signal

We fabricate directly modulated membrane distributed reflector lasers on a Si waveguide by using the micro-transfer printing. A low threshold current of 1.2 mA and good optical coupling between the laser output and 220-nm-thick Si waveguides are achieved. 50-Gbit/s NRZ signal modulation is also demonstrated.