Among the 40G fiber optic modules, the common types are QSFP+SR4, QSFP+LR4, QSFP+-CSR4, etc. These types of fiber optic modules are changed in the purchase. If you choose, what are the characteristics? The following will introduce these common types.
1. What are QSFP+SR4, QSFP+LR4, QSFP+-CSR4?
QSFP+SR4,40G Ethernet short-distance transmission, is a small pluggable (QSFP) optical module that can provide higher port density and save overall system cost. "SR" means short distance. The maximum transmission distance is 150 meters, and the wavelength is 850nm. When it is used with OM3/OM4 multimode fiber, the transmission distance is 100m and 150m respectively. There are two interface modes: LC and MPO/MTP, can meet the high-density and high-speed transmission requirements, mainly used in multi-mode equipment, such as switches.
QSFP+LR4, It is also used for 40G Ethernet transmission. It is a transceiver module capable of long-distance transmission. It uses LC duplex connectors. In order to reduce dispersion in long-distance transportation, single-mode fiber is used. The transmission distance is 10km or 20km, the module converts 4 input channels (ch) of 10Gb/s electrical data into 4 CWDM optical signals, and multiplexes them into one channel for 40Gb/s optical transmission. On the contrary, at the receiver end, the module demultiplexes 40Gb/s input optical signals into 4 CWDM channel signals, and converts them into 4 channels of output electrical data. The wavelengths of the 4 channels are 1271, 1291, 1311 and 1331 nm.
QSFP+-CSR4,It is an extended version of QSFP+SR4, which is also suitable for short-distance transmission. QSFP+-CSR4 is an optical fiber ribbon cable with MPO/MTP connectors at both ends, plugged into QSFP module sockets, in OM3 multimode fiber (MMF) It can transmit data of more than 300m on the OM4 MMF, and can transmit data of more than 400m on the OM4 MMF. It is mainly used in data centers, rack equipment, routers or switches and other equipment.
40g QSFP+ fiber optic modules SR4, LR4, CSR4 and other types are all born for 40G Ethernet transmission. Which optical module to choose depends on the specific application. Shenzhen Sopto Technology Co., Ltd. (http://www.sopto.com.cn/) can provide a variety of types of modules. The following table lists the specific parameters of the company’s three QSFP+ fiber optic modules for reference. Welcome everyone to consult and inquiry.
Types | QSFP+SR4 | QSFP+MSR4 | QSFP+LR4 | QSFP+LR4S | QSFP+MCSR4 |
Light Source | VCSEL | VCSEL | DFB CWDM | DFB CWDM | VCSEL |
Wavelength | 850nm | 850nm | 1310nm | 1310nm | 850nm |
Fiber Types | MMF | MMF | SMF | SMF | MMF |
Connector | Duplex LC | MPO/MTP | Duplex LC | Duplex LC | MPO/MTP |
Transmission distance | 100m（OM3）150m（OM4） | 100m（OM3）500m（OM4) | 10km | 20km | 300m（OM3）400m（OM4) |
Tags : 40g qsfp+,40g optical module,qsfp+ module,fiber module
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