When adjusting the optical power, the flatness is a very important index. The adjustment of the flatness is generally completed through the single-channel VOA in the multiplexer board. For example…

When adjusting the optical power, the flatness is a very important index. The adjustment of the flatness is generally completed through the single-channel VOA in the multiplexer board. For example, when the flatness is adjusted through the M4OV, the M40V board can detect For the input optical power of all multiplexing ports, the project can set different VOAs according to different input power values to achieve the purpose of flatness commissioning.