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- W4384647974 abstract "Narrow-linewidth lasers have high spectral purity, long coherent length and low phase noise, so they have important applications in cold atom physics, quantum communication, quantum information processing and optical precision measurement. We inject transmitted laser from a narrow-linewidth (15 kHz) flat-concave Fabry-Perot (F-P) cavity made of ultra-low expansion (ULE) optical glass into 852-nm distributed-Bragg-reflector type laser diode (DBR-LD), of which the comprehensive linewidth of 1.67 MHz for the free running case. With the increase of self-injection power, the laser linewidth is gradually narrowed, and the inject-locking current range is gradually increased. The narrowest linewidth measured by the delayed frequency-shifted self-heterodyne (DFSSH) method is 263 Hz. Moreover, to characterize the laser phase noise, we use a detuned F-P cavity to measure the conversion signal from laser phase noise to intensity noise for both the free running case and self-injection lock case. Laser phase noise for the self-injection lock case is significantly suppressed in the analysis frequency range of 0.1-10 MHz compared to the free running case. Especially, the phase noise is suppressed by more than 30dB at the analysis frequency of 100 kHz." @default.
- W4384647974 created "2023-07-19" @default.
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- W4384647974 date "2023-07-17" @default.
- W4384647974 modified "2023-09-25" @default.
- W4384647974 title "Narrow-linewidth 852-nm DBR-LD with self-injection lock based on high-fineness optical cavity filtering" @default.
- W4384647974 doi "https://doi.org/10.48550/arxiv.2307.08297" @default.
- W4384647974 hasPublicationYear "2023" @default.
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