A wdm-rof-pon system based on optical frequency comb and polarization multiplexing

An optical frequency comb and polarization multiplexing technology, which is applied in the field of WDM-RoF-PON systems, can solve problems such as high cost, low carrier utilization rate, and complex system structure, and achieve simple equipment, low power consumption, and guaranteed flexibility Effect

Active Publication Date: 2022-02-08
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The invention provides a WDM-RoF-PON system based on optical frequency comb and polarization multiplexing, which solves the problems of complex system structure, low carrier utilization rate and high cost

Method used

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  • A wdm-rof-pon system based on optical frequency comb and polarization multiplexing
  • A wdm-rof-pon system based on optical frequency comb and polarization multiplexing
  • A wdm-rof-pon system based on optical frequency comb and polarization multiplexing

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Embodiment 1

[0054] At the OLT end, the tunable optical frequency comb generator generates frequencies ranging from 192.94THz to 193.22THz with a frequency interval of f c = 40GHz, 8 flat optical combs with a line width of 10MHz and a power of about 12.5dBm, such as figure 2 shown. 8 flat optical combs are used as the multi-carrier light source of the WDM-RoF-PON system. The multi-carrier light source is divided into 8 optical carriers with separate wavelength channels through the AWG2 with an output port bandwidth of 40 GHz. Each optical carrier adopts the same polarization multiplexing method and modulation method. The first optical carrier is input to PBS4 via PC3 and divided into two orthogonal polarization directions (i.e. Pol-X and Pol-Y). By setting PC3 to 20 degrees, the power of the optical carrier in the X polarization direction is slightly higher than that in the Y polarization direction. The power of the carrier. MZM5 and MZM6 consist of 10Gbit / s downlink wireless baseband ...

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Abstract

The invention discloses a WDM-RoF-PON system based on an optical frequency comb and polarization multiplexing, which includes an optical line terminal, a remote node and a plurality of optical network units. The optical frequency comb is used to provide a multi-carrier light source for the system, which simplifies the structure of the optical line terminal and reduces the cost of the light source of the system. Both uplink and downlink adopt polarization multiplexing technology, which greatly improves the carrier utilization rate of the system. The uplink signal is carried by the optical carrier reserved for the downlink, and no additional local light source is required in the optical network unit, which simplifies the structure of the optical network unit and reduces power consumption. The wired and wireless access can be realized simultaneously in the optical network unit, which ensures the flexibility of the user access mode, the required equipment is simple, and the system is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a WDM-RoF-PON system based on an optical frequency comb and polarization multiplexing. Background technique [0002] With the rapid growth of mobile communication services, the current low-rate, narrow-bandwidth wireless access network is difficult to meet the demands of high data rate and large bandwidth. Since the high-frequency microwave band has greater communication capacity and higher data transmission rate, more and more researchers have focused their attention on the high-frequency microwave band. However, the attenuation of high-frequency microwave signals in the atmosphere is large and the diffraction ability is poor, so the propagation distance of high-frequency microwave signals in wireless communication is greatly limited. [0003] RoF technology combines the advantages of optical fiber communication and wireless communication, and the distributed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04J14/02
CPCH04Q11/0062H04J14/0227H04Q11/0067H04Q2011/0079
Inventor 李培丽刘阳
Owner NANJING UNIV OF POSTS & TELECOMM
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