Micro-Transfer-Printed Narrow-Linewidth Widely Tunable III-V-on-Si Laser across S+C+L bands

In this work, we demonstrate for the first time a narrow-linewidth III-V-on-Si laser with more than 110 nm wavelength tuning range realized using micro-transfer printing (uTP) technology. Two types of pre-fabricated III-V semiconductor optical amplifiers (SOAs) with a photoluminescence (PL) gain peak around 1525 nm and 1575 nm are micro-transfer printed on two silicon photonics (SiPh) laser cavities fabricated on imecs 400 nm platform. By combining the outputs of the two laser cavities, wavelength tunability over S+C+L-bands is achieved.