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Mechanical vibration induced frequency noise is dominated at low Fourier frequencies in a fiber spool stabilized laser. Environmental vibration causes mechanical deformations in the fiber which induce phase fluctuations and then convert into excess frequency noise to the lasers. Therefore, the spool which supports the fiber plays a critical role in this frequency noise conversion. We have studied...
We report on a fiber-stabilized agile laser with ultra-low frequency noise. The frequency noise power spectral density (PSD) is comparable to the one of an ultra-stable cavity stabilized laser at Fourier frequencies higher than 30 Hz. When it is chirped at a constant rate of ~ 40 MHz/s, the max non-linearity frequency error is about 50 Hz peak to peak over more than 600 MHz tuning range. When the...
We estimate asymptotic probabilities of a cycle slip for a non-decision aided feedforward carrier synchronizer in dispersion-uncompensated optical lines with negligible nonlinear crosstalk.
Very low frequency noise lasers are important tools for many applications such as high-resolution spectroscopy, optical atomic clock local oscillator, interferometric sensor (including gravitational waves detection), and coherent optical communications systems. Laser linewidth is usually reduced by locking to an ultra-stable optical cavity, using the Pound-Drever-Hall method. It led to fractional...
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