[CFA6G] Precision Clock and Network

[CFA6G-02 (Invited(P))] Highly stable laser repeater system with frequency instability below 10^-21

*Tomoya Akatsuka¹, Hiromitsu Imai¹, Kaoru Arai¹, Hiroki Sakuma¹, Atsushi Ishizawa¹, Takashi Goh², Toshikazu Hashimoto³, Masao Takamoto⁴, Hidetoshi Katori^4,5, Katsuya Oguri¹, Hideki Gotoh¹, Tetsuomi Sogawa⁶ (1. NTT Basic Research Labs. (Japan), 2. NTT Device Innovation Center (Japan), 3. NTT Device Technology Labs. (Japan), 4. RIKEN (Japan), 5. The Univ. of Tokyo (Japan), 6. NTT Science and Core Technology Laboratory Group (Japan))

[Presentation Style] Onsite

We report an ultralow-noise laser repeater system based on a narrow-linewidth laser and a planar lightwave circuit chip. An out-of-loop measurement demonstrates a record frequency instability of 3 × 10^-22 at 30,000 s averaging time.