|
|
|
| System of High Precise Frequency Dissemination Based on Optical Comb |
| LU Jin-long1,CHEN Xing1,CUI Yi-fan1,LU Xing 2,CI Cheng3,ZHANG Xue-song3,LIU Bo3,WU Hong3,TANG Ting-song4,SHI Ke-bin2,ZHANG Zhi-gang1,GUO Hong1 |
1. State Key Laboratory of Advanced Optical Communication System and Networks,School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
2. State Key Laboratory of Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
3. School of Electronic Information and Optical Engineering, Nankai University, Tianjin 300071, China
4. Beijing Satellite Navigation Center, Beijing 100094, China |
|
|
|
|
Abstract The optical frequency comb locked to frequency reference (10 MHz) of a hydrogen atomic clock was used as a stable frequency source for frequency dissemination through commercial fiber link. The important is to cancel the noises acquired during the tansmission in the fiber link. The comb spectrum was spliced by a dense wavelength division multiplexer (WDM) to about 0.8 nm including 1000 comb lines. The phase noise was detected by comparing the local and returned remote comb. This noise was digitized and feed-forwarded to the remote end through an optical communication module. At the remote, the phase noise radio frequency recovered from the optical comb was compensated in accordance with the received digital signal. The system has been tested in a long distance (120 km) and a short distance (16 km) fiber link. The dissemination fractional frequency instability (Λ-counter) has been measured at 1.11×10-15/s in the long distance fiber link and 8.80×10-16/s in the short distance fiber link
|
|
|
|
|
|
|
|
［1］Foreman S M, Holman K W, Hudson D D, et al. Remote transfer of ultrastable frequency references via fiber networks ［J］. Rev Sci Instrum, 2007, 021101.
［2］Jung K, Kim K. Subfemtosecond synchronization of microwave oscillators with mode-locked Er-fiber lasers ［J］. Opt Lett, 2012, 37: 2958-2960.
［3］Chen X, Zhang J, Lu J, et al. Feed-forward digital phase compensation for long distance precision frequency dissemination via fiber network ［J］. Opt Lett, 2015, 40: 371-374.
［4］Lu J, Chen X, Cui Y, et al. Stable frequency dissemination in commercial optical fiber with nonlinear wavelength shift for feedback comparison ［C］//The 10th International Conference on Ultra Fast Optics (UFO2015), Beijing, China, 2015. |
|
|
|
2015, Vol. 36 
