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Passive intrinsic-linewidth narrowing of ultraviolet extended-cavity diode laser by weak optical feedback

We present a simple method for narrowing the intrinsic Lorentzian linewidth of a commercial ultraviolet grating extended-cavity diode laser (TOPTICA DL Pro) using weak optical feedback from a long external cavity. We achieve a suppression in frequency noise spectral density of 20 dB measured at frequencies around 1 MHz, corresponding to the narrowing of the intrinsic Lorentzian linewidth from 200 kHz to 2 kHz. The system is suitable for experiments requiring a tunable ultraviolet laser with narrow linewidth and low high-frequency noise, such as precision spectroscopy, optical clocks, and quantum information science experiments.

preprint2014arXivOpen access
Polnop SamutpraphootSophie WeberQian LinDorian GangloffAlexei BylinskiiBoris BravermanAkio KawasakiChristoph RaabWilhelm KaendersVladan Vuletić
physics.optics
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Open access10 authors1 topic
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Polnop SamutpraphootSophie WeberQian LinDorian GangloffAlexei BylinskiiBoris BravermanAkio KawasakiChristoph RaabWilhelm KaendersVladan Vuletić

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