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    • 7. 发明授权
    • Optical reception apparatus compatible with DQPSK polarization multiplexing format
    • 光接收装置兼容DQPSK偏振复用格式
    • US07689074B2
    • 2010-03-30
    • US12232607
    • 2008-09-19
    • Akihiko IsomuraJens Rasmussen
    • Akihiko IsomuraJens Rasmussen
    • G02B6/28
    • H04J14/06G02F2001/212G02F2203/21H04B10/677
    • In the optical reception apparatus, a DQPSK polarization multiplexed signal light (S) input thereto is split into horizontally/vertically polarized signal lights (SH, SV) by a polarization beam splitter (3), and the signal lights (SH, SV) each is branched into two by each of optical couplers (4H, 4V). Then, one branched lights (SH1, SV1) by each of the optical couplers (4H, 4V) are supplied to a delay interferometer (5I) on the I branch via optical circulators (10I1, 10I2) to be propagated in bidirectional, and the other branched lights (SHQ, SVQ) by each of the optical couplers (4H, 4V) are supplied to a delay interferometer (5Q) on the Q branch side via optical circulators (10Q1, 10Q2) to be propagated in bidirectional, so that a set of delay interferometers (5I, 5Q) is commonly used for horizontally polarized waves and vertically polarized waves.
    • 在光接收装置中,通过偏振分束器(3)将输入的DQPSK偏振复用信号光(S)分离为水平/垂直偏振信号光(SH,SV),各信号光(SH,SV)分别 由光耦合器(4H,4V)分支成两个。 然后,每个光耦合器(4H,4V)的一个分支光(SH1,SV1)经由光循环器(10I1,10I2)被提供给I分支上的延迟干涉仪(5I)以被双向传播,并且 通过光耦合器(4H,4V)中的每一个的其他分支光(SHQ,SVQ)经由光循环器(10Q1,10Q2)被提供给Q分支侧的延迟干涉仪(5Q),以被双向传播, 一组延迟干涉仪(5I,5Q)通常用于水平极化波和垂直极化波。
    • 10. 发明申请
    • Apparatus method for monitoring the I-Q phase bias in an I-Q quadrature modulation transmitter
    • 用于监测I-Q正交调制发射机中的I-Q相位偏置的装置方法
    • US20070230617A1
    • 2007-10-04
    • US11723938
    • 2007-03-22
    • Zhenning TaoJens Rasmussen
    • Zhenning TaoJens Rasmussen
    • H04L27/12
    • H04L27/364G02F1/0123G02F1/2255H04B10/5561
    • An apparatus and a method for a I-Q quadrature modulation transmitter monitor a phase bias between an I branch and a Q branch of the I-Q quadrature modulation transmitter. The I-Q quadrature modulation transmitter includes the I-branch, the Q-branch equipped with a phase bias, and a tap. The apparatus is installed between the tap and the phase bias, and monitors the phase between the I branch and the Q branch which phase is introduced by the phase bias. The apparatus includes the following components: a module squarer, receiving signal from the tap and outputting a module square of the received signal; a multiplier, to multiplying data of the I-branch, data of the Q-branch and the module square to output a multiplied signal; and an averager, averaging the multiplied signal output by the multiplier. The phase between the I branch and the Q branch may be corrected according to monitoring results.
    • 用于I-Q正交调制发射机的装置和方法监视I-Q正交调制发射机的I分支和Q分支之间的相位偏置。 I-Q正交调制发射机包括I分支,配备有相位偏置的Q分支和抽头。 该装置安装在抽头和相位偏置之间,并监视I相和Q分支之间的相位,该相位由相位偏置引入。 该装置包括以下组件:模块平方器,从抽头接收信号并输出​​接收信号的平方; 乘法器,用于将I分支的数据,Q分支的数据和模块平方相乘以输出相乘的信号; 和平均器,对乘法器输出的相乘信号进行平均。 I分支和Q分支之间的相位可以根据监测结果进行校正。