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Description
The structure of the optical module
Optical Module, also known as Optical Module. Optical means “able to see, see, or see”.
Accurately speaking, optical module is a general term for a variety of module categories, including: optical receiving module, optical transmitting module, optical transceiver integrated module and optical forwarding module.
Today we usually refer to the optical module, generally refers to the optical transceiver integrated module (the same is true below).
Optical modules work at the physical layer, the lowest level of the OSI model. Its role is very simple to say, is to achieve photoelectric conversion. Turn an optical signal into an electrical signal, turn an electrical signal into an optical signal, and so on.
Although seemingly simple, the implementation process is not low technical content.
An optical module is usually composed of an optical emission device (TOSA, including a laser), an optical receiving device (ROSA, including a light detector), a functional circuit and an optical (electrical) interface.
At the transmitting end, the driver chip processes the original electrical signal and then drives a semiconductor laser (LD) or light emitting diode (LED) to emit a modulated light signal.
At the receiving end, after the light signal comes in, the light detection diode is converted into an electrical signal, and the electrical signal is output after the preamplifier.
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