High-precision narrow laser linewidth measurement based on coherent envelope demodulation
Optical Fiber Technology（2019）
Abstract
•Linewidth can be measured through demodulating the coherent envelope of short delayed self-heterodyne spectrum.•The measurement method can ignore the influence of Gaussian broadening induced by 1/f frequency noise.•This method was proved more precise by the experimental results.
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Key words
Linewidth measurement,Self-heterodyne interferometry,Demodulation
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