Abstract:Integrated narrow-linewidth lasers are the key devices in compact coherent optical
systems of metrology, sensing, and optical microwave generation. Here,
we demonstrate a hybrid integrated laser based on an optical negative
feedback scheme. The laser is composed of a commercial distributed
feedback (DFB) laser diode and an on-chip micro-resonator with a
Q-factor of 0.815 million. The feedback optical field is coupled back
to the laser cavity through the back facet. Therefore, the … Show more
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