Sole Excited-State InAs Quantum Dot Laser on Silicon With Strong Feedback Resistance

Jia-Jian Chen, Zi-Hao Wang, Wen-Qi Wei, Ting Wang, Jian-Jun Zhang
2021 Frontiers in Materials  
A feedback insensitive laser is a prerequisite for a desirable laser source for silicon photonic integration, as it is not possible to include an on-chip optical isolator. This work investigates the feedback insensitivity of an InAs/GaAs quantum dot laser epitaxially grown on an Si (001) substrate by operating in a sole excited state. The experimental results show that the sole excited-state lasing InAs quantum dot lasers on Si are less sensitive to external optical feedback than both
more » ... t and distributed-feedback quantum-well lasers. By comparing the laser behavior under different feedback levels, sole excited-state InAs quantum dot lasers on Si exhibit at least a 28 dB stronger feedback tolerance than quantum-well lasers. This result proposes a possible route for a high feedback insensitive laser as an on-chip light source towards Si waveguide integration with the absence of an optical isolator.
doi:10.3389/fmats.2021.648049 fatcat:cwt4wk5uwrfv7nsxhmp7e3f3fi