The speed of development of optical communication data centers is an inevitable trend; then, for suppliers, in order to maintain priority competitiveness, it is necessary to continuously adjust the packaging of optical modules and continuously increase the transmission rate of optical modules. Then, before such a situation, the development of an optical module was born.
There are many kinds of optical module packages, including the early 1*9 and GBIC; and the more popular optical module packages such as CFP and QSFP28.
The speed of the optical module is also 155M, 622M, 1.25G, 2.5G, 4.25G, 10G, 40G developed to the current 100G, 200G or even 400G optical modules.
Today, Xiaobian shares with you the 100G QSFP28 optical module.
The 100G QSFP28 optical module first appeared in 2013. After several years of development, the 100G QSFP28 optical module has been derived into several categories, each with different optical module standards and suitable for different transmission applications.
The following small series takes the 100G QSFP28 CWDM4 2KM optical module as an example to introduce the detailed parameters of the 100G QSFP28 optical module.
1 : 4 channel full duplex optical module
What is a 4-channel optical module?
The 4-channel optical module uses the same fiber, and both can transmit 4 channels of optical wavelength simultaneously.
2 : Transmission data rate up to 26Gbps per second
This is easy to understand. The transmission rate of the 100G QSFP28 optical module is 100G, and the optical module transmits using a 4-channel optical fiber, so the transmission data rate can reach up to 26Gbps per second.
3 : CDR circuit built in the receiving end and transmitting channel
This is about the structure of the optical module.
The optical module is composed of an optoelectronic device, a functional circuit, an optical interface, and the like, and the optoelectronic device includes two parts, a transmitting and receiving device.
The transmitting part is: an electric signal inputting a certain code rate is processed by an internal driving chip to drive a semiconductor laser (LD) or a light emitting diode (LED) to emit a modulated light signal of a corresponding rate, and an optical power automatic control circuit is internally provided therein. The output optical signal power remains stable.
The receiving part is: the optical signal input module of a certain code rate is converted into an electrical signal by the photodetecting diode. After the preamplifier, the electrical signal of the corresponding code rate is output.
4 : low power consumption
The power consumption of modules with different model parameters is different. 100G is different from package, generally 3.5-9w. So the power consumption of this 100G QSFP28 optical module is < 3.5W, which is a good aspect.
5 : hot swap
According to the mode of use: optical modules can be divided into non-hot plug and hot swap;
6 : LC interface
Fiber optic connectors can be classified into FC type, SC type, LC type, ST type, and KTRJ type.
7: Temperature 0 °C to +70 °C
By observing the temperature of the optical module, it can be known whether the optical module is an industrial-grade optical module or a commercial-grade optical module;
Commercial grade 0 ° C ~ +70 ° C; industrial grade -40 ° C ~ +85 ° C
In addition to the 100G QSFP28 optical module, the 100G QSFP28 high-speed cable has also been widely welcomed because it can greatly reduce the cost of 100G short-distance transmission. There are two main types of 100G QSFP28 high-speed cables: QSFP28 to QSFP28 high-speed cable and QSFP28 to SFP28 high-speed cable.
Both ends of the QSFP28 to QSFP28 high-speed cable are QSFP28 fiber transceivers; one end of the QSFP28 to SFP28 high-speed cable is the QSFP28 fiber transceiver, and the other end is four SFP28 fiber transceivers. In general, the length of the 100G QSFP28 high-speed cable does not exceed 5m.
Through today's introduction, we have a certain understanding of the performance parameters of the 100G QSFP28 optical module.
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