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4 common 40G QSFP+ optical modules to introduce

Date: 2019-12-04 14:30 From: C-light Onclick:
The 40G optical module refers to the optical module with the transmission rate of 40Gbps. QSFP are its main packaging forms, and 40G QSFP+ optical module is one of the most widely used. Here, C-light.com takes a look at some common 40G QSFP+ choices, hope to help you choose optical modules.
 
1. 40G LR4 QSFP+ optical module
 
The 40G LR4 QSFP+ optical module is generally used together with LC single-mode optical fiber jumper, and the transmission distance is up to 10km.
It has four data channels, and they transmit data at the same time.Advantages of 40G LR4 QSFP+ optical module are high density, low cost, High speed, high capacity, low power consumption.
QSFP+
 
Working principle of 40G LR4 QSFP+ optical module: the laser driver controls the wavelength of arrival, and the optical signal passes through the multiplexer and is grouped
all together for transmission. Near the receiving end, these transmitted signals are then demultiplexed into four transmission rates at 10Gbps channel, and then a PIN detector or mutual resistance amplifier restores the data stream and transmits the optical signal
 
2. 40G SR4 QSFP+ optical module
 
The 40G SR4 QSFP+ optical module is often used together with the MPO/MTP connector in the 40G data transmission, with 4 independent full duplex channel, is also transmitted through four channels at the same transmission rate as LR4. The difference is that 40G SR4 QSFP+ optical modules are often used with multi-mode optical fiber. When used with OM3 optical fiber jumper, the transmission distance is 100m, and it hops with OM4 optical fiber
When the lines are used together, the transmission distance is 150m.
QSFP+
 
Working principle of 40g base-sr4 optical module: when transmitting signals at the sending end, the electrical signals are first converted to by the laser array
 
Optical signal: when transmitting the signal at the transmitting end and receiving the signal at the receiving end, the photodetector array converts the parallel optical signal into parallel Electric signal.
 
3. 40G QSFP+ DAC high-speed cable
 
The 40G QSFP+ DAC high-speed cable consists of two 40G QSFP+ optical transceivers and a copper cable.
 
Advantages of DAC:
(1) low cost, reduce dust and other pollutants on the fiber optic cable, improve the transmission efficiency;
(2) the interior of high-speed cable is made of copper core, with good heat dissipation effect and energy saving and environmental protection;
(3) low power consumption of high-speed cable.
 
4, 40G QSFP+ AOC active cable
 
40G QSFP+ AOC active optical cable is the core component to realize parallel optical interconnection. It is connected by ribbon optical cable with 2 40G QSFP+ Optical transceiver components.
QSFP+ AOC active fiber optic cables are Fiber optic cable component products efficiently integrated and designed for short distance multi-channel data communication and interconnection applications, each signal direction has four data channels, each channel speed is 10Gbps.
 
Advantages of AOC:
The transmission power is lower, so the power consumption is small;
The weight and volume are much smaller than those of high-speed cables.
The transmission distance is further (up to 100~300 meters).
 
Conclusion
 
When you use right optical modules, your device's stability and network speed will be greatly improved. Want to know more about Optical module solution, welcome to the C-light product official website pages.

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