Design and fabrication of a compact,high-performance interference-filter-based external-cavity diode

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A hertz-linewidth ultra-stable laser[USL],which will be used to detect the clock transition line,in a strontium optical clock will be launched into the China Space Station[CSS]in late 2022.As the core of the USL,an interference-filter-based external-cavity diode laser[IF-ECDL]was developed.The IF-ECDL has a compact,stable,and environmentally insensitive design.Performances of the IF-ECDL are presented.The developed IF-ECDL can pass the aerospace environmental tests,indicating that the IF-ECDL can be suitable for space missions in the CSS.
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