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A 23.75-GHz frequency comb with two low-finesse filtering cavities in series for high resolution spectroscopy*
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Hou Lei a), Han Hai-Nian a)† , Wang Wei b), Zhang Long a), Pang Li-Hui a), Li De-Hua a), Wei Zhi-Yi a)‡ |
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| Schematic diagram of the astro-comb. The red solid lines represent optical paths, the black solid lines are fiber paths, and the dashed lines show the electrical paths. ISO: optical isolator; WDM: wavelength division multiplexer; LD: laser diode; Gain fiber: Yb-doped fiber; λ /2: half-wave plate; PZT: piezoelectric transducer; PD: photodiode; AOFS: acoustic–optical frequency shifter. |
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