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GHz Figure‐9 Er‐Doped Optical Frequency Comb Based on Nested Fiber Ring Resonators
In article number 2300537, Xinru Cao, Jiaqi Zhou, Yan Feng, and colleagues propose a GHz optical frequency comb (OFC) based on nested fiber resonators. By leveraging the interplay between gain competition and precise alignment of the free‐spectral‐ranges of external and internal optical resonators, they demonstrate...
The field of optical‐frequency‐combs (OFCs) has seen significant progress in recent years due to the advance of mode‐locked fiber lasers with low‐noise performance and long‐term reliability. With the emergence of applications, OFCs with repetition rates close to GHz have become highly sought after. However, generating GHz fiber‐based combs with low noise remains a significant challenge. In this study,...
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