发明授权
- 专利标题: Passive optical network using loop back of multi-wavelength light generated at central office
- 专利标题(中): 无源光网络使用中央办公室产生的多波长光环路
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申请号: US10427284申请日: 2003-05-01
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公开(公告)号: US07254344B2公开(公告)日: 2007-08-07
- 发明人: Jong-Kwon Kim , Seong-Taek Hwang , Yun-Je Oh
- 申请人: Jong-Kwon Kim , Seong-Taek Hwang , Yun-Je Oh
- 申请人地址: KR Suwon-Si, Gyeonggi-Do
- 专利权人: Samsung Electronnics Co., Ltd.
- 当前专利权人: Samsung Electronnics Co., Ltd.
- 当前专利权人地址: KR Suwon-Si, Gyeonggi-Do
- 代理机构: Cha & Reiter, LLC
- 优先权: KR10-2002-0068846 20021107
- 主分类号: H04B10/00
- IPC分类号: H04B10/00 ; H04J14/00
摘要:
A passive optical network includes a central office and a subscriber-side apparatus connected with the central office through an optical fiber link. The subscriber-side apparatus performs communication with the central office based on wavelength-division-multiplexed optical signals. The central office has a routing section, provided with first to fourth multiplexing ports, for demultiplexing multi-wavelength light inputted from the fourth multiplexing port into a plurality of channels. Each of the demultiplexed channels is amplified and multiplexed for output through the first multiplexing port. Optical signals inputted through the third multiplexing port are demultiplexed and outputted upstream. The routing section also multiplexes channels for downstream optical signals, outputting the multiplexed channels through the second port. A splitting section, provided with first to third splitting ports and arranged on a loop optical waveguide connects the first and fourth multiplexing port with each other. The splitting section causes some of multi-wavelength light inputted into the first splitting port to be outputted through the second splitting port and causes the remainder of multi-wavelength light to be outputted through the third splitting port connected with the fourth multiplexing port. A circulator causes the multi-wavelength light inputted through the second splitting port to be transmitted to the subscriber-side apparatus and causes upstream optical signals received from the subscriber-side apparatus to be outputted to the third multiplexing port.