公开(公告)号：US20130223838A1

公开(公告)日：2013-08-29

申请号：US13688624

申请日：2012-11-29

Applicant: Fujitsu Optical Components Limited

Inventor： Masakazu Horishita ,  Shinichi Sakuramoto

IPC: H04B10/071

CPC classification number: H04B10/071

Abstract: A transmitting apparatus connected via an optical branching apparatus to an optical communication device group includes a control unit that for each periodic transmission period including a first transmission period with a test period in which the optical communication device group is not allowed to transmit optical signals and a second transmission period without the test period, allows the optical communication device group to transmit the optical signals during a period different from the test period; a test light sending unit that sends test light to the optical branching apparatus during the test period; a light receiving unit that receives optical signals transmitted from the optical communication device group, and reflected light of the sent test light; a measuring unit that measures intensity of the reflected light received at different elapsed times after the test light is sent; and an output unit that outputs information based on the measured intensity.

Abstract translation: 经由光分支装置连接到光通信装置组的发送装置包括控制单元，对于每个周期性的传输周期，包括具有不允许光通信设备组发送光信号的测试周期的第一传输周期，以及 没有测试周期的第二传输周期允许光通信设备组在与测试周期不同的时间段内传输光信号; 测试光发送单元，在测试期间将测试光发送到光分支设备; 光接收单元，其接收从光通信设备组发送的光信号和所发送的测试光的反射光; 测量单元，其测量在发射测试光之后在不同经过时间接收的反射光的强度; 以及输出单元，其基于测量的强度输出信息。

公开(公告)号：US09716556B2

公开(公告)日：2017-07-25

申请号：US14494900

申请日：2014-09-24

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Shinichi Sakuramoto

IPC: H04B10/69 ,  H04B10/272

CPC classification number: H04B10/6933 ,  H04B10/272

Abstract: An optical receiving device includes: a conversion device that converts an input burst optical signal into a positive phase electrical signal and a negative phase electrical signal; an amplification device that amplifies the positive phase electrical signal and the negative phase electrical signal; a first output terminal that outputs the positive phase electrical signal; a second output terminal that outputs the negative electrical signal; a first transmission line that couples the amplification device with the first output terminal and transmits the positive phase electrical signal; a second transmission line that couples the amplification device with the second output terminal and transmits the negative phase electrical signal; and a control device that reduces a potential difference between the first transmission line and the second transmission line in a no-signal period that is provided between burst optical signals.

公开(公告)号：US09203520B2

公开(公告)日：2015-12-01

申请号：US14045389

申请日：2013-10-03

Applicant: Fujitsu Optical Components Limited

Inventor： Kensuke Takahashi ,  Shinichi Sakuramoto

IPC: H04B10/06 ,  H04B10/60 ,  H04B10/69

CPC classification number: H04B10/60 ,  H04B10/695

Abstract: A detecting apparatus includes a threshold detection circuit that detects by a switchable time constant, a threshold of a level of an input optical burst signal; an input detection circuit that detects input of the optical burst signal; a level detection circuit that detects a level of the optical burst signal; a switching circuit that switches the time constant when a period that corresponds to the level detected by the level detection circuit has elapsed after the input is detected by the input detection circuit; and an output circuit that outputs the threshold detected by the threshold detection circuit.

Abstract translation: 检测装置包括阈值检测电路，其通过可切换时间常数来检测输入光突发信号的电平的阈值; 输入检测电路，检测所述光脉冲串信号的输入; 电平检测电路，其检测所述光突发信号的电平; 切换电路，在由所述输入检测电路检测到所述输入之后经过所述电平检测电路检测到的电平的期间时，切换所述时间常数; 以及输出由阈值检测电路检测出的阈值的输出电路。