Nowadays, with the continuous optimization and upgrading of optical fiber modules, PON (passive optical fiber network) has become an important way of carrying broadband access network services. PON is divided into GPON and EPON, GPON can be said to be an upgraded version of EPON. In this issue, let me take you to understand the GPON optical module.
First of all, GPON technology is better than EPON in terms of bandwidth utilization, cost, multi-service support, OAM function and other aspects of comparison. GPON uses scrambling code as line code, only changes the code, does not increase the code, so there is no bandwidth loss; With high gigabit rate, the cost is low in terms of single bit cost; Because of its unique packaging form, it can support ATM service and IP service well. OAM is rich in information, including bandwidth authorization allocation, dynamic bandwidth allocation (DBA), link monitoring, protection switching, key exchange, and various alarm functions.
GPON system optical module requirements are divided into A, B, C three levels, each level of the light indicators are different. At present, it is mainly divided into Class B+ and Class C+, and the optical power range of the ONU side is generally about 1-2dbm less than the OLT side. The differences are as follows:
The main function of the GPON ONU optical module is to receive and emit light, which is realized by the laser, and convert the modulated electrical signal into optical signal and input into the fiber network for transmission. The receiver completes the light receiving, amplifies the received light and converts it into an electrical signal to the system for signal processing, and gets useful information. Its package type is SFP, SC interface, the transmission rate is 1.25G/2.5G, the transmission distance can reach 20km, the transmission wavelength is 1310nm, the receiving wavelength is 1490nm, the DDM digital diagnosis function is supported, the commercial grade (0℃-70℃) and the industrial grade (-40℃-+85℃) working temperature is optional.
GPON OLT optical module package type is SFP, SC interface, transmission rate is 2.5G/1.25G, transmission distance up to 20km, transmit wavelength 1490nm, receive wavelength 1310nm, support DDM digital diagnosis function, commercial grade (0℃-70℃) and industrial grade (-40℃-+85℃) operating temperature is optional. Applicable to optical line terminals.
The above is the “GPON Optical module” knowledge explanation brought by Shenzhen HDV Photoelectric Technology Co., LTD. The module products produced by the company cover optical fiber module, Ethernet module, optical transceiver module, optical fiber access module, SSFP optical module, SFP optical fiber module and so on. The above module class products can provide support for different network scenarios. For the above products, it is paired with a professional and strong R & D team to provide technical support for customers, and a thoughtful and professional business team to provide quality service for customers in the early consultation and later work.