A 'digital decoherence' scheme that arithmetically combines short-delay phase measurements mimics very long delay self-heterodyne interferometry, enabling sub-hertz linewidth measurement with broad wavelength compatibility.
Observation of Motion-Dependent Nonlinear Dispersion with Narrow-Linewidth Atoms in an Optical Cavity,
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High-precision laser spectrum analyzer via digital decoherence
A 'digital decoherence' scheme that arithmetically combines short-delay phase measurements mimics very long delay self-heterodyne interferometry, enabling sub-hertz linewidth measurement with broad wavelength compatibility.