Optical frequency distribution using laser repeater stations with planar lightwave circuits
| Autor: | Katsuya Oguri, Hidetoshi Katori, Atsushi Ishizawa, Hiromitsu Imai, Hideki Gotoh, Takashi Goh, Toshikazu Hashimoto, T. Akatsuka, Noriaki Ohmae, Tetsuomi Sogawa, Ichiro Ushijima, Masao Takamoto |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Optical lattice Optical fiber business.industry Clock rate Bandwidth (signal processing) Electrical engineering 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics Interferometry Optics Planar law 0103 physical sciences 0210 nano-technology business Electronic circuit |
| Zdroj: | Optics express. 28(7) |
| ISSN: | 1094-4087 |
| Popis: | We report a cascaded optical fiber link which connects laboratories in RIKEN, the University of Tokyo, and NTT within a 100-km region using a transfer light at 1397 nm, a subharmonic of the Sr clock frequency. The multiple cascaded link employing several laser repeater stations benefits from a wide feedback bandwidth for fiber noise compensation, which allows constructing optical lattice clock networks based on the master-slave configuration. We developed the laser repeater stations based on planar lightwave circuits to significantly reduce the interferometer noise for improved link stability. We implemented a 240-km-long cascaded link in a UTokyo–NTT–UTokyo loop using light sent from RIKEN via a 30-km-long link. In environments with large fiber noise, the link instability is 3 × 10−16 at an averaging time of 1 s and reaches 1 × 10−18 at 2,600 s. |
| Databáze: | OpenAIRE |
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