1.PLC Splitters internal structure

l PLC products are composed of three parts：Input FA、Chip、Output FA.

As picture 1

l The structure of FA

  FA including the cover plate, substrate, fiber soft adhesive, hard adhesive. As picture 1

   Soft adhesive:It is used to fix the optical fiber on the FA cover plate and substrate and protect the optical fiber from damage   

Hard adhesive:Fixed the fiber where among the cover plate,substrate plate and  V-groove inside.

l V-groove  

Ø  V- groove is a V-shaped groove evenly distributed on FA substrate plate for placing and fixing bare optical fiber.

Ø  According to the number of channels, V-groove can be divided into 2CH, 4CH, 8CH, 16CH, 32ch, etc.

Ø  According to the number of  waveguide width ,V-groove can be divided into 127um and 250um .

l SPL Chip

Ø Structure

      As picture1，SPL chip made up chip and cover plate.

Ø The kinds of chip

      According to the number of channels, it can be divided into 1x8、1x16、2x8, etc.

      According to the angle:usually divided into + 8 ° and - 8 ° chips..

Ø Waveguide distribution

l Polishing angle

+8°’s chip and FA 

Ø -8°’s  chip and FA 

1.PLC splitter classification

l Model（Specifications）classification

    According to the number of product input and output channels, it can be divided into 1x2, 1 * 4, 1 * 32, 1 * 4, etc.

l Encapsulation type

    According to different packaging processes or methods, PLC splitter is usually divided into the following five types.

Ø   Splitter encapsulation—— Splitter

Ø   Branch encapsulation——Fan-out

Ø   Mini module encapsulation ——BL

Ø   Module encapsulation——Module

Ø   Chassis encapsulation——Chassis/Panel

1.PLC Product optical parameters

Ø Insertion loss（IL）  The relative variation of the output optical power with respect to the input optical power.

                  Mathematical expression IL=-10lg（Pout/Pin）

Ø Return loss（RL） The relative change of reflected optical power relative to input optical power.

                  Mathematical expression IL=-10lg（Pref/Pin）

Ø Uniformity(UNI)   To measure the difference in performance between different channels of a device, usually expressed as

                    UNI=IL （max）-IL（min）

Ø Directional (DIR)  Measure the signal crosstalk degree between each channel of the device.

                  Mathematical expression IL=-10lg（Pout  ch2/Pin ch1）

Ø Temperature dependent loss（TDL）Maximum change of product IL under different temperature conditions.

Ø Wavelength dependent loss（WDL）The maximum variation of product IL at different wavelengths.

Ø Polarization dependent loss（PDL） The ratio of the maximum transmission to the minimum transmission in a polarized state.

                  PDL_{dB}=10log〔\frac{T_{Max}}{T_{Min}}〕
 Inside Tmax and Tmin represent the maximum and minimum transmission of DUT respectively.