External cavity diode laser with kilohertz linewidth by a monolithic folded Fabry-Perot cavity optical feedback |
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| Authors: | Zhao Yang Peng Yu Yang Tao Li Ye Wang Qiang Meng Fei Cao Jianping Fang Zhanjun Li Tianchu Zang Erjun |
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| Affiliation: | Division of Electricity and Quantum Metrology, National Institute of Metrology, 18 Beisanhuan East Road, Beijing, 100013, China. zhaoyang@nim.ac.cn |
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| Abstract: | We present a extended-cavity diode laser (ECDL) with kilohertz linewidth by optical feedback from a monolithic folded Fabry-Perot cavity (MFC). In our experiments, an MFC replaces the retroreflecting mirror in the traditional ECDL configuration. Beat-note measurements between this MFC-ECDL and a narrow-linewidth reference laser are performed and demonstrate that the linewidth of this MFC-ECDL is about 6.8 kHz. Phase locking of this MFC-ECDL to the reference laser is achieved with a unity gain as small as 10.2 kHz. |
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