advantage

1. The taper coupler has more than 20 years of history and experience, and many equipment and processes only need to be used.

The fee is only a few tenths of the PLC

2. The raw materials are only easily available quartz substrate, optical fiber, heat shrinkable tube, stainless steel tube and less glue, while the machine

And the investment depreciation cost of the instrument is less, and the cost of low-channel splitters such as 1×2 and 1×4 is low.

3. The splitting ratio can be monitored in real time as needed, and unequal splitters can be made.

shortcoming

1. The loss is sensitive to the wavelength of light. Generally, the device should be selected according to the wavelength. Usually, the wavelength signal that can be used is limited.

1310+-40nm, 1490+-10nm, 1550+-40nm.

2. The uniformity is poor, the nominal maximum difference of 1X4 is about 1.5dB, and the difference above 1×8 is larger.

3. The insertion loss varies greatly with temperature TDL

4. Multiplexers such as 1×16 and 1×32 are relatively large in size.