Laser coherence linewidth measurement based on deterioration of coherent envelope

Zhang, Chaoze; Huang, Ligang; Guan, Tianyu; Mao, Yuqin; Dang, Laiyang; Lan, Tianyi; Shi, Leilei; Gao, Lei; Zhu, Tao

doi:10.1016/j.optlastec.2023.110498

Cited by 1 publication

(1 citation statement)

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“…Short delay fibers can lead to coherent envelope distinct beat spectra, and the laser linewidth can be obtained by fitting the beat spectra [ 133 , 134 , 135 ]. We have successively proposed coherent envelope demodulation methods based on iterative algorithms [ 136 , 137 ] and self-coherent detection methods based on strong coherent envelopes [ 138 ].…”

Section: Comparative Analysis and Technical Difficultiesmentioning

confidence: 99%

Linewidth Measurement of a Narrow-Linewidth Laser: Principles, Methods, and Systems

Chen,

Sun

et al. 2024

Sensors

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Narrow-linewidth lasers mainly depend on the development of advanced laser linewidth measurement methods for related technological progress as key devices in satellite laser communications, precision measurements, ultra-high-speed optical communications, and other fields. This manuscript provides a theoretical analysis of linewidth characterization methods based on the beat frequency power spectrum and laser phase noise calculations, and elaborates on existing research of measurement technologies. In addition, to address the technical challenges of complex measurement systems that commonly rely on long optical fibers and significant phase noise jitter in the existing research, a short-delay self-heterodyne method based on coherent envelope spectrum demodulation was discussed in depth to reduce the phase jitter caused by 1/f noise. We assessed the performance parameters and testing conditions of different lasers, as well as the corresponding linewidth characterization methods, and analyzed the measurement accuracy and error sources of various methods.

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