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首页> 外文期刊>Optical fiber technology >Suppression of optical beat interference-noise in orthogonal frequency division multiple access-passive optical network link using self-homodyne balanced detection
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Suppression of optical beat interference-noise in orthogonal frequency division multiple access-passive optical network link using self-homodyne balanced detection

机译：利用自同调平衡检测抑制正交频分多址无源光网络链路中的拍频干扰噪声

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摘要

A new technique, which reduces optical beat interference (OBI) noise in orthogonal frequency division multiple access-passive optical network (OFDMA-PON) links, is proposed. A self-homodyne balanced detection, which uses a single laser for the optical line terminal (OLT) as well as for the optical network unit (ONU), reduces OBI noise and also improves the signal to noise ratio (SNR) of the discrete multi-tone (DMT) signal. The proposed scheme is verified by transmitting quadrature phase shift keying (QPSK)-modulated DMT signal over a 20-km single mode fiber. The optical signal to noise ratio (OSNR), that is required for BER of 10~(-5), is reduced by 2 dB in the balanced detection compared with a single channel due to the cancellation of OBI noise in conjunction with the local laser.
机译：提出了一种减少正交频分多址无源光网络（OFDMA-PON）链路中的光拍干扰（OBI）噪声的新技术。自同态平衡检测，将单个激光器用于光线路终端（OLT）和光网络单元（ONU），可降低OBI噪声，并提高离散多路复用器的信噪比（SNR）音（DMT）信号。通过在20公里单模光纤上传输正交相移键控（QPSK）调制的DMT信号来验证所提出的方案。 BER为10〜（-5）所需的光信噪比（OSNR）在平衡检测中与单通道相比减少了2 dB，这是因为与本地激光器一起消除了OBI噪声。

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