How to choose a cost-effective optical module

optical module Mainly includes Optical electronic devices, functional circuits and optical interfaces, etc., is an important device in optical communication fast fiber optics (feisu.com)

I. Look at the demand

It's good to see. whether the requirements are met , such as clothes have many styles, light modules also have many kinds of, mainly divided into: GBIC, SFP, SFP +, XFP, SFF, CFP, etc., optical interface types include SC and LC. many kinds of, if you do not know what you want, then how quickly you choose to your favorite module?

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two. See Product parameters

Many people think that buying something is a big brand and good quality. In fact, this idea is not entirely correct, the quality as the first factor to consider is understandable, but the excessive reliance on the brand is not very wise. Selecting optical modules depends not only on the quality, but also on the parameters.

1. Center Wavelength:

There are currently 3 main types:

850nm (MM, multimode, low cost but short transmission distance, generally only transfer 500M);

1310nm (SM, single mode, transmission process loss of large but small dispersion, generally used for transmission within 40KM);

1550nm (SM, single mode, transmission process loss of small but large dispersion, generally used for over 40KM long-distance transmission, the farthest can be transmitted directly without relay 120KM);

2. transfer rate:

currently there are 4 kinds: 155Mbps, 1.25Gbps, 2.5Gbps, 10Gbps , the transmission rate is generally backwards compatible, so 155M optical modules are also called Fe (hundred gigabit) optical modules, and 1.25G optical modules are also known as GE (Gigabit) optical Modules .

3. transmission Distance:

the optical signal does not need to be relayed to enlarge the distance directly transmitted , optical modules generally have the following specifications: Multimode 550m, single-mode 15km, 40km, 80km and 120km and so on.

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three. look at the old and new color

buy a mobile phone is afraid to buy a second-hand mobile phone, Choose the module is the same reason, afraid to buy secondhand. It's time to eyes peeled. The method of identifying the second-hand optical module, the rapid optical fiber is also here to summarize a few:

1. look appearance, the appearance of the new module, consistency is better, and the old module for different manufacturers of products, and after a long period of use, the shell is very old, no luster, there are some wear scratches, fiber mouth dust.

2. look at the casing, the general multimode has plastic casing and metal casing two kinds. Second-hand old casing fiber degree difference, rough, intuitive feeling poor. Single mode is generally a metal casing. Second-hand old casing of the inner wall has a good scratch, bad metal color, a few casing comparison of poor consistency, and the new module casing color bright, smooth, consistent.

3. put the module into a 50-60 degree environment to test if it is working properly.

four. See Enterprise

Whether it is a black cat, or a white cat, can catch the mouse is a good cat, the same as mentioned above, rely on the big brand is not wise, sometimes can bring us surprises, perhaps it is the development of enterprises. Big brand, product quality is guaranteed, but the price is expensive, some small enterprises, product quality is still guaranteed, but the price is moderate, how a company's products can let everyone rest assured that only to do this:

1. Quality Assurance

A company good, to see how the qualification, a variety of quality system certification, such as CE, ROHS, FCC and so on, and has been iso9001:2008 confirmed, and has strict internal quality management procedures of the company, has been the official certification to ensure the quality, then we worry about what!

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2. Unconditional return of goods

The general business will say that the goods in the presence of any non-human damage, providing 15 days of return, and some reliable small and medium-sized enterprises, dare to promise goods in the absence of any problems, to provide 60 days Exchange services.

3. Long warranty period

The lifetime of a light module is 5 years, and it is difficult to see good or bad in the first year, and the problem arises in the second or third year of use. Quality assurance manufacturers dare say five years warranty, more common has the rapid optical fiber (feisu.com).

according to the above 4, I believe you can choose to a cost-effective ultra-high Optical Module .

How to choose a cost-effective optical module