A recirculating delayed self-heterodyne method using a Mach–Zehnder modulator for kHz-linewidth measurement

Deng, Shuo; Li, Min; Hong-yun, Gao; Dai, Yawen

doi:10.1016/j.yofte.2016.06.007

Cited by 4 publications

(2 citation statements)

References 18 publications

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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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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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“…The spectrum transmitted to the ESA will typically be broadened under this frequency noise. 17) Fitting, 18,19) recirculating delay 20,21) or reading results with larger attenuations 22,23) often cannot fully offset the negative effects of 1/f frequency noise. So, it becomes more appropriate to investigate the characteristics of the coherent envelope using a short delay line.…”

mentioning

confidence: 99%

A Lorentzian narrow-linewidth demodulation scheme based on a short fiber delayed self-heterodyne technique

Bai

Zhao

Chen

et al. 2022

Appl. Phys. Express

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We propose a narrow-linewidth demodulation method which utilizes a short-fiber-delayed self-heterodyne structure and coherent envelope spectral properties to restore the Lorentzian line shape of the laser output. The Lorentzian spectrum obtained using our scheme is consistent with that obtained using a traditional long-delay method, and here, the utilization of a short fiber avoids the broadening caused by 1/f noise. Both simulated and experimental results demonstrate that our scheme is effective and accurate. We demonstrate the recovery of a Lorentzian linewidth of 6.0 kHz, while maintaining higher accuracy than that achieved using traditional schemes (31.7 kHz).

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A simplified optical millimeter-wave generation scheme based on frequency-quadrupling

Tao

Hong-yun

Deng

et al. 2020

Optoelectron. Lett.

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A recirculating delayed self-heterodyne method using a Mach–Zehnder modulator for kHz-linewidth measurement

Cited by 4 publications

References 18 publications

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

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

A Lorentzian narrow-linewidth demodulation scheme based on a short fiber delayed self-heterodyne technique

A simplified optical millimeter-wave generation scheme based on frequency-quadrupling

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