公开(公告)号：EP2963846A4

公开(公告)日：2016-11-16

申请号：EP13876197

申请日：2013-10-18

申请人： NEC CORP

发明人： INADA YOSHIHISA

IPC分类号： H04B10/2557 ,  H04B10/516 ,  H04B10/532 ,  H04B10/54 ,  H04J14/00 ,  H04J14/02 ,  H04J14/04 ,  H04J14/06

CPC分类号： H04J14/06 ,  H04B10/5161 ,  H04B10/532 ,  H04B10/541 ,  H04J14/02

摘要： An object of the invention is to provide a wavelength division multiplexing optical transmission apparatus and a wavelength division multiplexing optical transmission method which are capable of reducing the transmission quality deterioration of polarization multiplexed optical signals generated in an optical fiber transmission line and are suitable for dense wavelength division multiplexing. A wavelength division multiplexing optical transmission apparatus (11) includes a plurality of polarization multiplexing optical modulation means (2-1 to 2-N), polarization-maintaining optical multiplexing means (3), and delay adjustment means (4). The polarization multiplexing optical modulation means (2-1 to 2-N) generate a plurality of polarization multiplexed optical modulation signals (P-1 to P-N) having different wavelengths. The polarization-maintaining optical multiplexing means (3) multiplexes the wavelengths of the polarization multiplexed optical modulation signals (P-1 to P-N) to generate a wavelength multiplexed optical signal (WDM). The delay adjustment means (4) adjusts a delay such that light intensities of polarization multiplexed optical modulation signals having adjacent wavelengths in the wavelength multiplexed optical signal (WDM) vary inversely with respect to each other.

公开(公告)号：EP3125447A4

公开(公告)日：2018-03-21

申请号：EP15769740

申请日：2015-03-20

申请人： NEC CORP

发明人： INADA YOSHIHISA

IPC分类号： H04B10/572 ,  H01S5/0687 ,  H04B10/07 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0227 ,  H01S5/0687 ,  H04B10/506 ,  H04B10/572 ,  H04B10/61

摘要： To provide an optical communication device and the like with which the optical signals output by multiple light output units can be set with an accurate wavelength interval. An optical communication device equipped with: multiple light output units that output optical signals of mutually different wavelengths; a multiplexing unit that outputs a wavelength-multiplexed signal by multiplexing the multiple optical signals output from the multiple light output units; a reference light output unit that outputs reference light serving as a reference; a wavelength generation unit that, on the basis of the reference light, outputs multiple light beams having a wavelength interval in accordance with a prescribed frequency; and a wavelength control unit that controls the wavelength of the optical signals output by the light output units in accordance with the interference component between the wavelength-multiplexed signal and light with the wavelength of at least one of the multiple light beams.

公开(公告)号：EP2882118A4

公开(公告)日：2016-04-13

申请号：EP13825957

申请日：2013-05-07

申请人： NEC CORP

发明人： INADA YOSHIHISA

IPC分类号： H04B10/548 ,  H04B10/255 ,  H04B10/2557 ,  H04B10/50 ,  H04B10/532 ,  H04J11/00 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06 ,  H04L27/20

CPC分类号： H04J14/06 ,  H04B10/255 ,  H04B10/2557 ,  H04B10/5053 ,  H04B10/532 ,  H04B10/548 ,  H04J14/00 ,  H04J14/04 ,  H04L27/2096

摘要： A polarization multiplexing optical transmitter of the present invention includes frequency dividing means (21) that performs frequency dividing on a clock signal having a Baud rate frequency, phase modulation means (8) that performs phase modulation on a light signal in accordance with the clock signal having undergone the frequency dividing, branching means (2) that branches the phase-modulated light into two light signals, delay means (10) that delays one branched light signal relative to the other branched light signal to generate light signals having phases inverted relative to each other, and polarization multiplexing means (5) that synthesizes the generated signals lights with orthogonal polarizations to generate a polarization multiplexed signal. Hence, the polarization multiplexing optical transmitter that can further improve the signal quality can be accomplished.