Three-wavelength parallel optical fiber dispersion measurement using dual-heterodyne mixing.
Three-wavelength parallel optical fiber dispersion measurement using dual-heterodyne mixing.
复制标题
使用双外差混频进行三波长并行光纤色散测量。
DOI：
10.1364/ao.51.006586
复制
发表时间：
2012
期刊：
影响因子：
1.9
通讯作者：
Masaichi Nakamura
中科院分区：
文献类型：
--
作者：
T. Shioda;N. Shimizu;Masaichi Nakamura
提出了一种利用双外差混频测量相对相位的新型色散测量系统。该系统通过在激光光源中引入光调制器产生光边带，并利用阵列波导光栅分离光边带，实现了相邻频率间相对相位的平行测量。为了实现较宽的频散范围，在系统中对相邻频率组合不同的频率间隔。一种是三频光色散测量系统（three-frequency measurement），该系统已被开发用于测量间隔为25 GHz的光频谱相邻峰之间的相对相位，而无需进行任何频率扫描。另一种是四频光色散测量系统（四频测量），由三频组产生2ghz的间隔，以扩大测量范围。使用0 ~ 90 km不同长度的单模光纤进行实验，色散斜率为16.8 ps/nm/km，测量范围为2500 ps/nm，不确定度小于1 ps/nm。该系统的优点是，即使使用光学标度上的GHz间隔，也可以在没有高速（GHz）光电探测器的情况下在频率轴上进行平行测量，从而反映双外差混频。
We propose a novel optical dispersion measurement system using dual-heterodyne mixing to measure the relative phase. The system can realize parallel measurement of the relative phases between adjacent frequencies by introducing optical modulators to generate optical sidebands from a laser light source and an arrayed waveguide grating to separate the sidebands. To realize a wide dispersion range, different frequency intervals for the adjacent frequencies were combined in the system. One is the three-frequency optical dispersion measurement system (three-frequency measurement), which has been developed to measure the relative phase between adjacent peaks of an optical frequency spectrum with intervals of 25 GHz generated without any frequency scanning. The other is the four-frequency optical dispersion measurement system (four-frequency measurement) with intervals of 2 GHz generated from the three-frequency sets to expand the measurement range. The experimental results using single-mode optical fibers of different lengths from 0 to 90 km indicated the dispersion slope to be 16.8 ps/nm/km with a measurement range of 2500 ps/nm and an uncertainty of less than 1 ps/nm. The proposed system provides advantages to enable parallel measurement on a frequency axis without a high-speed (GHz) photodetector, even though GHz spacing on the optical scale is used, thus reflecting the dual-heterodyne mixing.