The WDM optical amplifier repeater series (OEO) plays an important role in WDM (wavelength division multiplexing) systems, especially in DWDM (dense wavelength division multiplexing) systems. The WDM Optical Amplification Repeater Series (OEO) combines the transmitter and receiver into one, and is a protocol and rate transparent fiber optic media converter used in conjunction with SFP, SFP+, XFP, and QSFP optical modules, with a data rate of up to 11.32Gbps. The WDM optical amplifier repeater series (OEO) extends the transmission distance of the network by converting wavelengths (1310 to 1550) and increasing optical power, and has the functions of balanced amplification, timing extraction, and recognition regeneration (3R) of optical signals. Usually, WDM optical amplifier repeater series (OEO) with optoelectronic conversion (O-E-O) function are used together with optical multiplexers in terminal multiplexers.
How does the WDM optical amplifier repeater series (OEO) work?
The biggest feature of WDM optical amplification repeater series (OEO) is the ability to receive, amplify, and re transmit signals through different wavelengths without changing the data/signal content. Nowadays, wavelength conversion can only be achieved through the WDM optical amplification repeater series (OEO). The WDM optical amplifier repeater series (OEO) works like a regenerator, converting the optical input signal into an electrical signal, generating a logical copy of the input signal through a new electrical pulse amplitude and waveform, and using this electrical signal to drive the transmitter to generate an optical signal with a new wavelength.
Why is the WDM optical amplifier repeater series (OEO) required in WDM systems?
There are multiple reasons why we need the WDM optical amplifier repeater series (OEO). Firstly, they can connect incompatible devices, such as converting the carrier wavelength of the optical network 1300NM. Secondly, due to the different providers and standards of our fiber optic network, we need to transition from one fiber optic network to another through the WDM optical amplification repeater series (OEO). The WDM optical amplifier repeater series (OEO) has helped us reduce the number of wavelengths needed.
Development of WDM Optical Amplification Repeater Series (OEO)
Signal regeneration was not previously achieved in the WDM optical amplifier relay series (OEO). Initially, these WDM optical amplifier relay series (OEO) were only used to convert the wavelength of external input signals into wavelengths suitable for WDM systems. This conversion process is also used to stabilize the frequency and amplify the power of these signals, making them compatible with EDFA in DWDM systems. Due to the evolution of the WDM optical amplifier relay series (OEO) from 1R to 3R, the complexity of its signal regeneration components has also increased.
|
1R
|
1R是重新放大的简写，用于最早的WDM光放大中继器系列（OEO）。从它的名字看，1R并不“整理”信号，而是简单地接收外部输入信号并将它转换为一种模拟信号。这一过程无视信号的完整性。结果，若输入的光信号是“垃圾信号”，那么它的模拟版本也将是一个“垃圾信号”。还有就是，由于远距离传输本身可能会导致信号的衰减，DWDM系统的实际传输距离受到了限制。
|
|
2R
|
2R是重新整形和重新放大的简写。在将外部输入信号重新放大之前，先将它进行整理。这时，信号的质量已得到监控。
|
|
3R
重新放大、重新定时和重新整形
|
3R是重新放大、重新定时和重新整形的简写。它比1R和2R系统更为先进。由于在信号内部嵌入了质量数据位，信号质量可以被更为密切和精确地监控。这些质量数据位可将信号的健康度和衰减度告知系统。3R系统能够监控双向通信。
|
|
转换器或复用转换器
|
根据不同的供应商，转换器有不同的名字。它执行相对简单的任务，即将低速率信号通过时分复用技术加载到系统中一个具有较高速率的载波上（常见的一个例子就是，接收4个OC-48信号，然后在1550NM波段上输出一个OC-192的信号）。最新的转换器设计已经吸收了越来越多的TDM功能，在一些情况下避免了对SONET/SDH传输设备的需求。
|
WDM Optical Amplification Repeater Series (OEO) VS Optical Module
The WDM optical amplifier repeater series (OEO) and optical modules are functionally similar devices, which convert full duplex electrical signals into full duplex optical signals. The difference between the two is that the optical module is electrically connected to the host system through a serial interface, while the WDM optical amplifier relay series (OEO) is connected through a parallel interface. Therefore, the WDM optical amplifier repeater series (OEO) is easier to handle low-speed parallel signals, but it has a larger size and consumes more power. In addition, the optical module only provides the function of converting electricity to light (without distinguishing between serial or parallel electrical interfaces), while the WDM optical amplifier relay series (OEO) can convert one wavelength of optical signal into another wavelength of optical signal. Therefore, the WDM optical amplifier repeater series (OEO) can be considered as two back-to-back optical modules.
