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- W4328131598 abstract "Chip-scale narrow-linewidth lasers have rich applications in sensing, communication, spectroscopy and light detection and ranging (LiDAR). Self-injection locking is one of the most efficient techniques to reduce linewidth significantly. By locking a laser to an external cavity, some amounts of light reflect back into the laser for mode competition, leading to a significant reduction of the lasing linewidth. In this work, we demonstrated a hybrid-integrated laser with a Microring Resonator (MRR) butt-coupled to a Distributed Feedback (DFB) laser. The radius of the MMR is designed to be 442.3 μm, corresponding to a Free Spectral Range (FSR) of about 50 GHz. And the MMR has a quality factor (Q factor) of 3×10<sup>6</sup> , fabricated in an ultralow loss silicon nitride (Si<sub>3</sub>N<sub>4</sub>) waveguide platform. In this way, the frequency noise has been reduced to 12.565 Hz²/Hz at the 10 MHz offset frequency. Finally, 40 Hz intrinsic linewidth and 91.2 kHz integral linewidth are achieved, characterized by a delayed self-heterodyne interferometer." @default.
- W4328131598 created "2023-03-22" @default.
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- W4328131598 date "2023-03-21" @default.
- W4328131598 modified "2023-10-18" @default.
- W4328131598 title "Integrated narrow-linewidth laser source based on self-injection locking" @default.
- W4328131598 doi "https://doi.org/10.1117/12.2666966" @default.
- W4328131598 hasPublicationYear "2023" @default.
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