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Tapered photonic crystal fibers with different transition profiles were designed and fabricated to control the visible dispersive wave generation process, and broadband visible supercontinuum (350–700 nm) was achieved.
We demonstrate an astro-comb for relatively low resolution astronomical spectrographs. The space of comb lines is Altered to 30 GHz by a Fabry-Perot cavity spaced by an ULE glass. The radial velocity precision is <40 cm/s.
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