使用外差探测的相干光码分多址技术的实验演示。
Experimental demonstration of coherent OCDMA using heterodyne detection.
机构信息
Department of Electrical and Computer Engineering, The Johns Hopkins University, 3400 N. Charles St., Barton 105, Baltimore, Maryland 21218, USA.
出版信息
Opt Lett. 2013 Jul 1;38(13):2351-3. doi: 10.1364/OL.38.002351.
We present the first experimental demonstration of a practical, fully coherent, optical code division multiple access (OCDMA) scheme that can fully suppress multiple access interference (MAI) and speckle noise without phase locking or thresholding and gating. The scheme is sourced from an optical comb generator and uses spectral phase encoding and a heterodyne receiver with balanced detection. Here we present results for a four-user configuration at 50% load. At 4.5 Gbits/s per user, the system achieves a signal to MAI ratio of 648 at a bit error rate of 10(-7).
我们首次展示了一种实用的、完全相干的光码分多址（OCDMA）方案的实验演示，该方案无需锁定相位、设置阈值或门控，即可完全抑制多址干扰（MAI）和散斑噪声。该方案源自光学梳状发生器，并采用光谱相位编码和具有平衡检测的外差接收机。这里我们给出了在 50%负载下四用户配置的结果。在每个用户 4.5Gbits/s 的速率下，该系统在误码率为 10(-7)时实现了 648 的信号与 MAI 比。
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