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    • 80. 发明专利
    • Optical signal receiving device
    • 空值
    • JP5360184B2
    • 2013-12-04
    • JP2011254172
    • 2011-11-21
    • 富士通株式会社
    • 久雄 中島剛司 星田崇仁 谷村
    • H04B10/50H04B10/64G02F2/00H04B10/07H04B10/40H04B10/516H04B10/60H04B10/61
    • PROBLEM TO BE SOLVED: To provide an optical signal receiving device with a high reception accuracy, in an optical receiver combining coherent reception and digital signal processing. SOLUTION: An optical signal receiving device has: a polarization beam splitter that carries out polarization separation of a received optical signal; optical mixture means that mixes each signal light of respective polarization waves obtained by carrying out the polarization separation, with local oscillation light by using at least two kinds of optical phases to generate at least four systems of optical signals corresponding to the combinations of respective polarization waves and the optical phases; optical electric conversion means that converts the at least four systems of optical signals, which are obtained by the optical mixture means, into electric signals; amplification means that amplifies the respective electric signals obtained by the optical electric conversion means with a common gain; analog-to-digital conversion means that digitalizes the electric signals obtained by the optical electric conversion means; and control means that detects an intensity of the optical signals and controls the gain of the amplification means depending on the intensity. COPYRIGHT: (C)2012,JPO&INPIT
    • 要解决的问题:提供一种组合相干接收和数字信号处理的光接收机中具有高接收精度的光信号接收装置。解决方案:光信号接收装置具有:进行偏​​振分离的偏振分束器 接收光信号; 光学混合装置意味着通过使用至少两种光学相位将通过进行偏振分离而获得的各个偏振波的每个信号光与本地振荡光混合,以产生对应于各个极化波的组合的至少四个光信号系统 和光学相位; 光电转换装置,其将由光混合装置获得的至少四个光信号系统转换成电信号; 放大手段,以共同的增益放大由光电转换装置获得的各个电信号; 模数转换装置,用于将由光电转换装置获得的电信号数字化; 以及控制装置,其检测光信号的强度,并根据强度来控制放大装置的增益。