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Brief Introduction of Optical Module There are many different types of optical modules. It can be largely divided into the light receiving-emitting components, such as the laser, the modulator (modulator), and the transmission components, such as optical fiber, waveguide. Traditional sfp optical module is used primarily for the network, particularly the need for long-distance transmission signals WAN, MAN. However, with the continuous improvement of the system frequency, the system local data exchange has increasingly become a bottleneck. Optical modules have been gradually widely used in the local system. In order to guarantee components produced by different system components suppliers to mutually compatible, IEEE particularly developed protocol standards ? ? OC-192 VSR (Very Short Reach) Standard for thelocal system optical module applications. Optical Electronic Integrated Circuits Optical electronic integrated circuits have a significant impact on the design and application of optical modules. How to effectively integrate the laser, receiver, and follow-up amplifier circuit and auxiliary circuit used in transform the signals is still a hot technology. Although silicon is the most common semiconductor circuit craft material, but thesfp fiber module properties of the silicon does not only be used in some of the imaging device whose requirements on speed are insensitive, but it cannot achieve the requirements of the communications. In optical module, III-V compound semiconductor such as GaAs, InP, or different adulteration series which are derived from it are mostly used to make the laser and the receiver. Precise control of adulterated series can guarantee a continuously available band of laser, while some of the technical requirements, such as lower operating current can achieved by adulteration. In order to integrate more function in the same module, the circuit technology based on GaAs and InP also developed rapidly. The technology of GaAs or InP is more suitable than silicon process for the development of high-end circuit, although it is far smaller than the silicon process in terms of the price and yield. With the increasing speed requirements of the communications industry, as well as the gradual expansion of the production scale, there will be a significant development in GaAs, InP process. Single-mode or Multi-mode From the view of ensuring the quality of signal transmission, the single-mode fiber is clearly much better than multimode fiber. In a multimode fiber, due to the different modes of light has a different propagation velocity and dispersion relation, when the transmission is greater than a certain distance (typically 500 meters), the different modes of light dispersed in time, resulting in the mutual interference between the signals of different clock cycles. (Intersymbol Interference), thus affecting the quality of the signal transmission. Unfortunately, although the single-mode fiber has good transmission characteristics, in order to guarantee single mode, the aperture of the optical fiber only to be less than ten microns which makes the coupling from the laser to optical fibers become a technical problem and the 850 nm laser is completely unable to spread in it. Because of this, multimode fiber is still widely used in the local area network and local system. this article come from:http://equipment.china-foodmachine.com/sfp-optical-module/application-of-optical-module.htm
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sfp optical module, sfp fiber module,
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