What is the optical module for

Release time:

2023-06-13 17:55

Source:

Long Bearing Communication

The optical module is the most important part of optical communication equipment, and it is the interconnection channel between the optical world and the electrical world.

Optical modules are optoelectronic devices that perform photoelectric and electro-optical conversion. The optical module is also called a fiber optic transceiver, which is mainly used for photoelectric conversion of signals. At the transmitting end, the electrical signal of the device is converted into an optical signal, and at the receiving end, the optical signal is restored to an electrical signal. The optical module is composed of a laser at the transmitting end, a detector at the receiving end, and electronic devices for data encoding/decoding.

Classification of optical modules

Optical modules are divided into the following common types according to the packaging form: SFP, SFP+, SFP28, QSFP+, QSFP28 and QSFP-DD.

The SFP optical module is an upgraded version of GBIC, with a maximum rate of 4.25G. It is mainly composed of lasers and is characterized by small size and hot-swappable.

SFP+ optical module is an enhanced version of SFP, with a transmission rate of 10Gbps, which can meet the application of 8.5G Fiber Channel and 10G Ethernet.

The transmission rate of the SFP28 optical module is 25Gbps, and its advantages are low power consumption, high port density, and support for hot plugging.

The QSFP+ optical module has a transmission rate of 40Gbps, supports MPO fiber optic connectors and LC fiber optic connectors, and is characterized by small size and hot-swappable.

The QSFP28 optical module adopts four 25Gbit/s channels for parallel transmission, and the transmission rate is 100Gbps, which meets the application of 100G Ethernet.

The rate of QSFP-DD optical module is 200Gbps and 400Gbps, using 8 25Gbit/s channels and 8 50Gbit/s channels respectively.

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What is the principle of optical communication?

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What is the optical module for

What is the principle of optical communication?

The principle of optical fiber communication is: at the sending end, the transmitted information (such as voice) must first be converted into an electrical signal, and then modulated onto the laser beam emitted by the laser, so that the intensity of the light changes with the amplitude (frequency) of the electrical signal. And send it out through the optical fiber; at the receiving end, the detector converts the optical signal into an electrical signal after receiving it, and restores the original information after demodulation.