Hybrid multiplexing passive optical communication method and hybrid multiplexing passive optical communication network

A communication method and communication network technology, applied in the field of hybrid multiplexing passive optical network, can solve the problems of rising, unfavorable evolution, deteriorating signal-to-noise ratio, etc. Effect

Inactive Publication Date: 2010-01-27
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This solution helps to improve the power budget of the system, but requires the optical modulation device at the ONU side to be polarization-independent, which will increase the cost
Another key problem is the ODN topology of the single-fiber feeder of the conventional PON network. The OLT receiving end will seriously deteriorate the signal-to-noise ratio due to the coherent Rayleigh scattering of the seed light. The seed light and uplink modulated

Method used

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  • Hybrid multiplexing passive optical communication method and hybrid multiplexing passive optical communication network
  • Hybrid multiplexing passive optical communication method and hybrid multiplexing passive optical communication network

Examples

Experimental program
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Embodiment 1

[0017] Such as figure 1 As shown, the OLT end includes an OLT optical receiver 1, an optical wavelength division multiplexer 2 for uplink and downlink signals at the OLT end, a pump laser module 3, a wavelength division multiplexer 4 for pump light and uplink and downlink signals, and a pump laser module 3 As a pump source, the wavelength of the pump source is consistent with the wavelength of the pump laser required for the doped special fiber 7 to generate spontaneous emission light. At the same time, this wavelength is also suitable for transmission in the feeder fiber 5 with low loss characteristics. The first wavelength division multiplexer 4 is a three-port passive device, its passband spectrum and reflection band spectrum distribution cover the wavelength of the pump laser module 3 and the uplink and downlink optical wavelengths required by all ONUs, it will feed the fiber The uplink signal light uploaded by 5 is output through its reflection port, and at the same time...

Embodiment 2

[0026] Such as figure 2 As shown, relative to the method of specific embodiment 1, the difference of this specific embodiment 2 is that the position of the pump laser module 3 is not at the OLT end, therefore, there is no need to go through figure 1 The first wavelength division multiplexer 4 in the injection feeder fiber 5 is directly connected to the fiber laser 6 through another optical fiber, and the fiber laser 6 is excited to generate pump light. Therefore, embodiment 2 saves the first wavelength compared with embodiment 1. Wavelength division multiplexer 4, adding a pump laser module to the excitation fiber laser fiber. Correspondingly, the second wavelength division multiplexer 14 in Embodiment 1 is not needed in Embodiment 2, so it is omitted. Other structures are the same, and the working principle and working method of Embodiment 1 and Embodiment 2 are the same, which can be understood by those skilled in the art, so details are not repeated here.

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Abstract

The invention relates to a hybrid multiplexing passive optical network and a communication method thereof, which are characterized in that a pumping wave which can be used for four-wave mixing frequency is injected into an optical communication line; after carrying out wavelength division multiplexing (FWM), the pumping wave and a user terminal uplink optical signal are injected into a high non-linear optical fiber or a high non-linear photonic crystal optical fiber; the high non-linear optical fiber or the high non-linear photonic crystal optical fiber realizes the FWM between the pumping wave and the user terminal uplink optical signal and generates a wavelength conversion optical signal; and after passing through a wavelength division multiplexer, the wavelength conversion optical signal is transmitted to an optical line terminal, thereby realizing optical signal uplink communication and supporting the transmission of a plurality of time division multiplexing optical networks in a single optical fiber. The hybrid multiplexing passive optical communication network utilizes the FWM effect in the high non-linear optical fiber and the high non-linear photonic crystal optical fiber, has favorable compatibility with original ONU equipment and the passive characteristics of ODN, can realize the upgrading of the network without changing the ONU equipment and greatly reduce the reforming cost of the network.

Description

technical field [0001] The invention relates to the technical field of hybrid multiplexing passive optical network. Background technique [0002] Hybrid multiplexing passive optical network (HPON) combines power division passive optical network (also known as time division multiplexing passive optical network, namely TDM-PON) and wavelength division multiplexing passive optical network (WDM-PON). ), it has a series of advantages such as large single-fiber access capacity, low network construction cost, and easy operation, maintenance and upgrade. WDM technology is adopted in HPON to support the operation of multiple TDM-PONs of a single fiber. Since each TDM-PON needs to be allocated an uplink and downlink wavelength, the key to HPON technology is to avoid using expensive wavelength-selective optical devices in the user terminal (ONU) of each TDM-PON optical network. If fixed-type lasers used for dense wavelength division multiplexing (DWDM) transmission are used in the ON...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04J14/02H04B10/20
Inventor 刘德明崔晟张敏明
Owner HUAZHONG UNIV OF SCI & TECH
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