公开(公告)号：US20180294888A1

公开(公告)日：2018-10-11

申请号：US15946202

申请日：2018-04-05

申请人： Fujitsu Optical Components Limited

发明人： Sukeyuki IWATA ,  Toshiki TANAKA ,  Masato NISHIHARA ,  Naoki KUWATA

IPC分类号： H04B10/588 ,  H04B10/54 ,  H04B10/61

CPC分类号： H04B10/588 ,  H04B10/541 ,  H04B10/61

摘要： An optical transmitter includes an optical modulator configured to modulate light from a light source; and a processor configured to generate a drive signal that is input into the optical modulator. The processor inserts a bias control signal amplitude-modulated at a low frequency, into an analog signal at fixed intervals, to generate the drive signal.

公开(公告)号：US20230098306A1

公开(公告)日：2023-03-30

申请号：US17897867

申请日：2022-08-29

申请人： FUJITSU OPTICAL COMPONENTS LIMITED

发明人： Toshio ISHII ,  Naoki KUWATA

IPC分类号： H04B10/079 ,  H04J14/02 ,  H04B10/60 ,  H04B10/40

摘要： An optical receiver includes an optical amplifier that amplifies a received optical signal containing multiple wavelengths, a monitor circuit that monitors light intensities of the demultiplexed optical signal, a processor, and a memory having information representing a relationship between a total incident light intensity of the optical signal incident onto the optical amplifier and gains of the optical amplifier for the respective wavelengths. The processor repeats first calculation for determining the gains of the respective wavelengths from the memory, based on a drive current for driving the optical amplifier and an estimation value of the total incident light intensity of the optical signal, second calculation for calculating the incident light intensities of the respective wavelengths of the optical signal based on the gains and the monitored light intensities, and third calculation to calculate the total incident light intensity of the optical signal, until the total incident light intensity converges.