Introduction on 5 Kinds of 40G QSFP+ Optical Transceivers
40G optical transceivers certainly are a series of optical transceivers with 40Gbps transmission rate, in which CFP and QSFP are the main form factors. And the 40G QSFP+ optical transceivers are one of the most widely used optical transceivers. In the post, Gigalight will introduce you several kinds of most popular 40G QSFP+ optical transceivers that can help you have a better choice.
40G LR4 QSFP+
The 40G LR4 QSFP+ optical transceiver is typically used with LC single-mode fiber patch cables for transmission distances up to 10km, and it has 4 data channels that transmit data simultaneously. The advantages of 40G LR4 QSFP+ optical transceivers are high density, low cost, high speed, large capacity, and low power consumption.
The working principle of 40G LR4 QSFP+ optical transceiver: The laser driver controls the arrival wavelength, the optical signal passes through the multiplexer and is combined together for transmission. When arriving at the receiving end, these transmitted signals are then demultiplexed by the demultiplexer into four channels with a transmission rate of 10 Gbps. Then the PIN detector or transimpedance amplifier recovers the data stream and transmits the optical signal.
40G SR4 QSFP+
The 40G SR4 QSFP+ optical transceivers are often used in combination with the MPO/MTP connector in 40G data transmission. It offers four independent full-duplex channels and can be transmitted through four channels. The transmission rate is the same as that of the LR4. The difference is usually that the 40 G SR4 QSFP+ optical transceivers tend to be used with multimode optical fiber. The transmission distance when using it with the OM3 optical fiber jumper is 100m, and the transmission distance when working with it with the OM4 optical fiber jumper is 150m.
The working principle of the 40GBASE-SR4 optical transceiver: when the transmitting end transmits a signal, the electrical signal is first changed into an optical signal via a laser array. When the transmitting end transmits a sign, the photodetector array converts the parallel optical signal when the getting end receives a signal.
40G LR4 PSM
As a highly integrated 4-channel optical transceiver, the 40G LR4 PSM optical transceivers have the benefits of high port density and low priced. The optical port of this optical transceiver adopts the parallel single-mode technology-PSM. It uses a 4-way parallel design MPO/MTP interface and the transmission distance is 10km.
The work principle of 40G LR4 PSM optical transceivers is in the same way as the 40G SR4 QSFP+ optical transceivers. The difference is definitely that 40G LR4 PSM optical transceivers are often used to connect with single-mode ribbon fiber connectors. That is, parallel optical signals are sent in parallel through eight single-mode optical fibers.
40G QSFP+ DAC
The 40G QSFP+DAC high-speed cable contains two 40G QSFP+ optical transceivers and a copper cable.
DAC Advantages:
(1) Low cost, reducing the impact of dust and other contaminants on optical cables, and improving transmission efficiency;
(2) The high-speed cable is constructed of copper core, which has good heat dissipation effect and is energy-saving and environmentally friendly.
(3) High-speed cables consume low power.
40G QSFP+ AOC
The 40G QSFP+AOC active optical cable is the core component of the parallel optical interconnection. It is composed of two 40G QSFP+ optical transceivers connected by a ribbon optical cable.
The QSFP+AOC active optical cable is an efficient integrated fiber optic cable assembly made for short-range, multi-channel data communication and interconnection applications. Each signal direction provides four data channels with a rate of 10 Gbps per channel.
40G LR4 QSFP+
The 40G LR4 QSFP+ optical transceiver is typically used with LC single-mode fiber patch cables for transmission distances up to 10km, and it has 4 data channels that transmit data simultaneously. The advantages of 40G LR4 QSFP+ optical transceivers are high density, low cost, high speed, large capacity, and low power consumption.
The working principle of 40G LR4 QSFP+ optical transceiver: The laser driver controls the arrival wavelength, the optical signal passes through the multiplexer and is combined together for transmission. When arriving at the receiving end, these transmitted signals are then demultiplexed by the demultiplexer into four channels with a transmission rate of 10 Gbps. Then the PIN detector or transimpedance amplifier recovers the data stream and transmits the optical signal.
40G SR4 QSFP+
The 40G SR4 QSFP+ optical transceivers are often used in combination with the MPO/MTP connector in 40G data transmission. It offers four independent full-duplex channels and can be transmitted through four channels. The transmission rate is the same as that of the LR4. The difference is usually that the 40 G SR4 QSFP+ optical transceivers tend to be used with multimode optical fiber. The transmission distance when using it with the OM3 optical fiber jumper is 100m, and the transmission distance when working with it with the OM4 optical fiber jumper is 150m.
The working principle of the 40GBASE-SR4 optical transceiver: when the transmitting end transmits a signal, the electrical signal is first changed into an optical signal via a laser array. When the transmitting end transmits a sign, the photodetector array converts the parallel optical signal when the getting end receives a signal.
40G LR4 PSM
As a highly integrated 4-channel optical transceiver, the 40G LR4 PSM optical transceivers have the benefits of high port density and low priced. The optical port of this optical transceiver adopts the parallel single-mode technology-PSM. It uses a 4-way parallel design MPO/MTP interface and the transmission distance is 10km.
The work principle of 40G LR4 PSM optical transceivers is in the same way as the 40G SR4 QSFP+ optical transceivers. The difference is definitely that 40G LR4 PSM optical transceivers are often used to connect with single-mode ribbon fiber connectors. That is, parallel optical signals are sent in parallel through eight single-mode optical fibers.
40G QSFP+ DAC
The 40G QSFP+DAC high-speed cable contains two 40G QSFP+ optical transceivers and a copper cable.
DAC Advantages:
(1) Low cost, reducing the impact of dust and other contaminants on optical cables, and improving transmission efficiency;
(2) The high-speed cable is constructed of copper core, which has good heat dissipation effect and is energy-saving and environmentally friendly.
(3) High-speed cables consume low power.
40G QSFP+ AOC
The 40G QSFP+AOC active optical cable is the core component of the parallel optical interconnection. It is composed of two 40G QSFP+ optical transceivers connected by a ribbon optical cable.
The QSFP+AOC active optical cable is an efficient integrated fiber optic cable assembly made for short-range, multi-channel data communication and interconnection applications. Each signal direction provides four data channels with a rate of 10 Gbps per channel.
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