Application scenarios of 100G CFP2 ER4 optical module in 100G 40km optical interconnection
With the accelerated development of the Internet and cloud computing industries, the number of long-distance demand for 100G product applications in data center DCI networks and metropolitan area networks has also increased. According to third-party forecasts, the number of 100G 40km optical modules in the next five years Will grow at an annual rate of 30%.
For 100G 40km optical interconnection application scenarios, we offer two products to meet the requirements of different application scenarios.
Product 1: 100G CFP2 ER4 optical module applied to OTN equipment, it supports OTU4 rate and can transmit 40km without turning on the forward error correction function, which can simplify the transmission network of the metropolitan area network, reduce the number of relay equipment, and reduce the system Delays and operational maintenance costs.
Product 2: 100G QSFP28 ER4 lite optical module applied to the DCI network of the data center, which provides a convenient choice for the long-distance interconnection application of 100G ports between data center rooms.
Next, we introduce the characteristics of these two products:
Compared with the first-generation CFP optical module, the 100G CFP2 ER4 reduces the volume of the CFP2 optical module by 50%, reduces power consumption by 40%, and increases the number of core device ports and enhanced data exchange capabilities. The technical solution of this optical module adopts EML laser (TOSA), PIN light detector (ROSA) and semiconductor optical amplifier (SOA). By optimizing the control of these three core components, it achieves the advantages of low power consumption. The typical power consumption is only 8W. At the same time, the ASIC hardware solution is used to implement the MDIO communication interface, which has the characteristics of strong compatibility.
The 100G CFP2 ER4 optical module uses two sets of advanced and efficient algorithms independently developed:
First, SOA gain control algorithm: Under the condition of receiving optical power changes, the advanced and efficient closed-loop adaptive algorithm can quickly lock the SOA working current and quickly adjust the amplification performance of SOA to ensure the normal operation of the receiver link, even if the system end is not turned on. The forward error correction function (FEC) can also meet the transmission distance of 40 km, making it fully comply with the IEEE802.3ba 100G BASE-ER4 standard and the strict ITU-T G.959.1 OTU4 (4L1-9C1F) standard.
Second, the high-precision RX DDM monitoring algorithm: the working current value of the SOA and the voltage value detected by the receiving end (ROSA) jointly build the RX DDM monitoring calculation model to achieve high-precision monitoring of the received optical power, and the RX DDM monitoring precision control Within plus or minus 1dB, the monitoring accuracy of the product is higher than the protocol requirements.
The 100G QSFP28 ER4 Lite adopts the QSFP28 package, which has the advantages of smaller size and lower power consumption, and meets the MSA specification of 100GE 4WDM-40. The transmitter of the optical module uses a dual-rate DML laser, which is the same as the EML laser version. Compared with the 100G QSFP28 ER lite optical module, it has the advantage of ultra-low power consumption, and the power consumption is less than 3.8W at 0 ~ 70 degrees full temperature, which meets the requirements of data center green energy saving. The receiving end of the optical module uses a high-sensitivity APD photodetector with a sensitivity of <-16.5dBm. It can meet the 40KM transmission requirement when the forward error correction function is enabled on the system side, and the forward error correction function is disabled on the system side. Can also meet the requirements of 30KM zero error transmission. This optical module provides a cost-effective solution for DCI optical interconnection between distributed data centers.
For 100G 40km optical interconnection application scenarios, we offer two products to meet the requirements of different application scenarios.
Product 1: 100G CFP2 ER4 optical module applied to OTN equipment, it supports OTU4 rate and can transmit 40km without turning on the forward error correction function, which can simplify the transmission network of the metropolitan area network, reduce the number of relay equipment, and reduce the system Delays and operational maintenance costs.
Product 2: 100G QSFP28 ER4 lite optical module applied to the DCI network of the data center, which provides a convenient choice for the long-distance interconnection application of 100G ports between data center rooms.
Next, we introduce the characteristics of these two products:
Compared with the first-generation CFP optical module, the 100G CFP2 ER4 reduces the volume of the CFP2 optical module by 50%, reduces power consumption by 40%, and increases the number of core device ports and enhanced data exchange capabilities. The technical solution of this optical module adopts EML laser (TOSA), PIN light detector (ROSA) and semiconductor optical amplifier (SOA). By optimizing the control of these three core components, it achieves the advantages of low power consumption. The typical power consumption is only 8W. At the same time, the ASIC hardware solution is used to implement the MDIO communication interface, which has the characteristics of strong compatibility.
The 100G CFP2 ER4 optical module uses two sets of advanced and efficient algorithms independently developed:
First, SOA gain control algorithm: Under the condition of receiving optical power changes, the advanced and efficient closed-loop adaptive algorithm can quickly lock the SOA working current and quickly adjust the amplification performance of SOA to ensure the normal operation of the receiver link, even if the system end is not turned on. The forward error correction function (FEC) can also meet the transmission distance of 40 km, making it fully comply with the IEEE802.3ba 100G BASE-ER4 standard and the strict ITU-T G.959.1 OTU4 (4L1-9C1F) standard.
Second, the high-precision RX DDM monitoring algorithm: the working current value of the SOA and the voltage value detected by the receiving end (ROSA) jointly build the RX DDM monitoring calculation model to achieve high-precision monitoring of the received optical power, and the RX DDM monitoring precision control Within plus or minus 1dB, the monitoring accuracy of the product is higher than the protocol requirements.
The 100G QSFP28 ER4 Lite adopts the QSFP28 package, which has the advantages of smaller size and lower power consumption, and meets the MSA specification of 100GE 4WDM-40. The transmitter of the optical module uses a dual-rate DML laser, which is the same as the EML laser version. Compared with the 100G QSFP28 ER lite optical module, it has the advantage of ultra-low power consumption, and the power consumption is less than 3.8W at 0 ~ 70 degrees full temperature, which meets the requirements of data center green energy saving. The receiving end of the optical module uses a high-sensitivity APD photodetector with a sensitivity of <-16.5dBm. It can meet the 40KM transmission requirement when the forward error correction function is enabled on the system side, and the forward error correction function is disabled on the system side. Can also meet the requirements of 30KM zero error transmission. This optical module provides a cost-effective solution for DCI optical interconnection between distributed data centers.
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