Adopting 1550 GEPON technology to construct a metropolitan area network is very suitable for the development of wired broadband. GEPON is multiplexed on the 1550 cable TV optical transmission system through low-cost WDM. It does not need to be modulated to RF like CMTS/CM to bring a series of technologies and cost troubles . 1550/1490/1310 three-wave shared optical splitting platform can build a very competitive and relatively low-cost wired broadband network to meet the needs of multiple services.
1550 transmission system advantages
In the 1550nm transmission system, the laser adopts external modulation, which not only has the advantages of high output power, high reliability, low unit optical power cost, low fiber loss, , but also can perform multi-stage amplification. Optical amplifiers have little effect on CTB and CSO indicators, very suitable for the development of China's TV network. Its advantages are mainly reflected in the following aspects:
1. The combination of 1550 optical transmitter and optical amplifier can realize the distribution of high power 13dBm-24dBm. Combined with the use of optical splitters, it can achieve flexible power distribution and flexible network structure. The 1550nm optical transmitter combined with high-power EDFA dense coverage optical nodes is a popular international networking solution.
2. The transmission loss of the 1550 optical transmission system in ordinary G.652 fiber is only 0.25 dBm/km, which makes the unit cost of the 1550 optical transmission system per milliwatt better than that of the 1310 system.
3. Only a few 1550 optical transmitters are needed for the entire network, so only a small amount of RF connections are required, and there is no need to add an expensive RF wiring management system like the 1310 system. The 1550 transmission system only needs 1+1 hot backup, which is simple and highly reliable to meet the telecom level requirements.
4. High index of 1550 transmission system in network distribution. The idea of the 1550 optical transmission system solution is to use the current internationally popular GEPON technology ideas of FTTP and FTTH , which can meet the needs of large video and interactive digital transmission for users in the next ten years.
GPON system advantages
With technology constantly growing, and end users demanding faster internet speed, fiberoptic technology is the absolute way to go. Fiber to the Home (FTTH) networks continue to be in high demand because of this. Fiber cables are the only thing that can support the demand for higher speeds as well as distance within networks. Fiber optic cables have another advantage over metal cables, such as copper, in that they are less susceptible to interference. Spark hazards are always a possibility when using a metal cable to transmit signal. Small sparks can occur when sending electric potentials down a metal medium, these small sparks have the potential to cause shortages. By using GPON fiber optic cables, this will eliminate that hazard due to no current being transmitted. With a single optical fiber being able to support multiple users due to the use of passive optical splitters makes GPON an advantage by reducing equipment, satisfying high density areas as well as supporting triple play service; voice, date and IP video at the demanding rate of the public. With ethernet connections being only point to point, GPONs clear advantage is it being point to multipoint as well as offering higher downstream speeds then EPON.
Gigabyte Passive Optical Networks (GPON’s) are networks which rely on optical cables to deliver information. GPON’s are currently the leading form of Passive Optical Networks. GPONS offer up to a 1:64 ratio on a single fiber. As opposed to a standard copper wire in most networks, GPON’s are 95% more energy efficient. In addition to efficiency, gigabyte passive optical networks provide a low cost solutions to adding users through splitters which make GPON’s desirable in populated areas.
Single-fiber triple-wave solution
In the single-fiber triple-wave solution, the downstream 1550nm optical signal and the PON 1310nm/1490nm optical signal of the broadcast and television service are combined into a fiber physical channel by the WDM wavelength division multiplexing device in the front-end machine, finally reach to users by tran
