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A Yb-fiber based frequency comb spanning more than 150 nm with a multi-GHz mode spacing was set up. Dynamic reamplification of suppressed modes in a nonlinear fiber after the filter cavities was observed and analyzed.
An Yb-fiber frequency comb was developed and employed to calibrate an astronomical spectrograph. The repeatability was photon noise limited at 300kHz. Absolute accuracy was improved by a factor of 20 compared to traditional calibration sources.
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