Composition and principle of active optical cable

06-01-2020

What is an active optical cable? What is the structure of the active optical cable? What is the principle of active optical cable? Let ’s take a look together.


  In the era of big data, the rapid development of optical network communications, passive optical cables or copper-based cable systems seem to be inadequate, and they have been unable to meet user needs and data transmission. Users urgently need a new product as the main transmission medium for high-performance computing and data centers. In this case, active optical cable products have emerged as the times require.


  Active optical cable is a new type of transmission optical cable. It needs external energy during communication to convert electrical signals into optical signals, or communication cables that convert optical signals into electrical signals. The optical transceivers at both ends of the optical cable provide photoelectricity. Conversion and optical transmission functions.

active optical cable


  Composition structure of active optical cable


  The main components of an active optical cable are divided into two parts: the optical path and the circuit. The optical path includes the lens and FA for converting the angle of the optical path. The circuit includes the PCB, substrate, VCSEL chip, VCSEL driver chip, PD chip, and TIA chip. As a main transmission medium for high-performance computers and data centers, active optical cables ensure the stability of transportation and application flexibility, which is more common in high-density applications.


  The principle of active optical cable


  At one end of the active optical cable, an electrical signal is input to the data, and the electrical signal is converted into an optical signal of a specific wavelength by a photoelectric conversion device. The optical signal is modulated and coupled and input into the transmission optical cable. After the optical signal reaches the other end, the photoelectric detection device The optical signals are detected, amplified, processed, and then the corresponding electrical signals are output. The reverse transmission principle is the same.


  In data centers and cloud computing systems, in order to meet the requirements of higher bandwidth and lower power, the 10G SFP + and 40G QSFP + in active optical cables can be well connected to switches or routers with high-speed optical communication ports. In the common digital signage, the active optical cable also plays an important role, which can support 1080p resolution in the outdoor HDMI environment. Not only that, active optical cables are also used in outdoor large interactive games.


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