Arbitrary wavelength-range modulator-integrated DFB lasers on a single wafer for WDM applications

The fabrication technique of modulator integrated DFB lasers with arbitrary wavelength range in a single wafer is proposed and demonstrated. Devices with a wide wavelength range from 1530 nm to 1610 nm were fabricated using four wafers. It was also confirmed that the wavelength range covered in a wafer could be arbitrary changed.