Acta Photonica Sinica, Volume. 47, Issue 12, 1214001(2018)
Recovery of an Ultra-narrow Linewidth Laser over 100 km Fiber Link
It is demonstrated that an ultranarrow linewidth laser is recovered after transfer through a 100 km fiber link. The fiber link consists of two 50 km spolled fibers cascaded by a repeater station where a transceiver laser is phase-locked to the transferred light of the 50 km fiber with tracking precision of 3.5×10-19. To maintain the high spectral purity, two fiber noise compensation modules are employed to compensate for the fiber-induced phase noise in each 50 km fiber. The cascaded scheme enables a large dynamic range for the noise compensation. The fractional frequency instability for the stabilized 100 km fiber is 5.9×10-17 at 1 s averaging time, reaching 6.8×10-19 at 10 000 s. The ultranarrow linewidth laser is recovered at the remote end of the 100 km fiber with additional linewidth of 1 mHz.
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MA Chao-qun, CHEN Guo-qing, LI Lei, GU Jiao, ZHU Chun, ZHU Zhuo-wei. Recovery of an Ultra-narrow Linewidth Laser over 100 km Fiber Link[J]. Acta Photonica Sinica, 2018, 47(12): 1214001
Received: Sep. 28, 2018
Accepted: --
Published Online: Jan. 10, 2019
The Author Email: Chao-qun MA (machaoqun@jiangnan.edu.cn)