EPON is a passive optical network based on Ethernet, which is an important part of optical access technology. The PON network consists of OLT (optical line terminal), ODN (passive optical splitter network) and ONU (optical network terminal). Partial composition. OLT equipment is located at the core position in the network topology. It accesses multiple service networks upwards, and accesses multiple user services through ODN downwards. It is an important node for service aggregation and distribution. The OLT also realizes multiple network management functions such as control, management, and ranging of the ONU of the user end equipment. Regardless of its network location or network functions, OLT equipment is the core of a PON network. The PON optical module is a high-performance optical module used in the PON system. It conforms to the ITU-T G.984.2 standard and multi-source agreement (MSA). It uses different wavelengths in the OLT (optical line terminal) and ONT (optical network terminal). ) Between sending and receiving signals.

In order to achieve compatibility with 1G EPON, 10G EPON does not use the 1490nm downstream wavelength used by the 1G EPON system. At the same time, it considers avoiding the analog video wavelength (1550nm) and OTDR test wavelength (1600~1650nm). The IEEE 802.3av standard selects 1577nm as The wavelength of the 10Gbit/s downstream signal (wavelength range 1574~1580nm). Therefore, in the downstream direction, 10Gbit/s signals and 1Gbit/s signals are WDM methods. In the upstream direction, the wavelength of 1Gbit/s signal is 1310nm (1260~1360nm), and the IEEE 802.3av standard stipulates that the upstream wavelength of 10Gbit/s signal is 1270nm (1260~1280nm). The two overlap, so WDM cannot be used. The dual-rate TDMA method can be used. The 10G EPON OLT can simultaneously discover 10G/10G ONUs, and the three types of ONUs, 10G/1G ONU and 1G/1G ONU, can coexist.

The 10G EPON optical modules currently on the market can be divided into two types: OLT (Optical Line Terminal) optical modules and ONU (Optical Network Unit) optical modules according to different plug-in devices. And 10G EPON has two package types, XFP and SFP+. Below, Yitianguang Communications will give you a list of 10G EPON optical modules.

1. 10G EPON XFP OLT optical module (asymmetrical/symmetrical)

The optical module adopts pluggable XFP package, with SC optical port, the downstream rate is 10.3125Gbps, the upstream rate is 1.25Gbps & 10.3125Gbps, the working wavelength is Tx1577nm/Rx1270nm (symmetrical), Tx1270nm/1310nm (asymmetrical) optional .

2. 10G EPON SFP+ OLT optical module (asymmetrical)

The optical module adopts a pluggable SFP+ package, with SC optical port, the downlink rate is 10.3125Gbps&1.25Gbps, the uplink rate is 1.25Gbps&10Gbps, the working wavelength is Tx1577nm/Rx1270nm, Tx1490nm/1310nm is optional, and its maximum transmission distance is 20km.

3. 10G EPON SFP+ ONU optical module (asymmetrical)

The optical module adopts a pluggable SFP+ package with SC optical port. The downstream rate is 10.3125Gbps&1.25Gbps, and the upstream rate is 1.25Gbps&10Gbps. The working wavelength is Tx1490/Rx1577, and the transmission distance is up to 20km.

The above is the 10G EPON optical module types listed by ETU-LINK. If you have any requirements, please go to E-Sky official website for consultation. The emergence of 10G EPON optical modules allows 1G EPON to be upgraded to 10G EPON on demand without replacing the original equipment and lines. The 10G EPON network is backward compatible, that is, under the same 10G PON port, it can be connected to EPON ONU It can also be connected to 10G EPON ONU, so that EPON services on the existing network can be smoothly transitioned.