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কোম্পানির খবর How does a PLC Splitter work?

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How does a PLC Splitter work?

2025-07-31

The PLC Splitter (Planar Waveguide Splitter) operates based on integrated optical waveguide technology and the multimode interference effect. It achieves optical power distribution by fabricating a precise optical waveguide structure on a quartz substrate using semiconductor processing. The detailed principles are as follows:

1. Core Waveguide Structure
  • A Y-branching or multimode interference (MMI) waveguide design is employed. By controlling the waveguide paths etched into the quartz substrate, the input optical signal is proportionally distributed to multiple output ports.
  • The waveguide's refractive index profile (high-index core and low-index cladding) constrains the optical signal's propagation direction, reducing energy leakage.
2. Splitting Process
  • Input Optical Coupling: The input optical fiber is aligned with the waveguide chip via a spot mode converter (SSC), and the optical signal enters the Y-branch waveguide.
  • Power Distribution: Light waves interfere in the branch waveguides, and the waveguide width and branching angle are designed to achieve either equal (e.g., 1:2, 1:4, etc.) or unequal power distribution.
  • Output Coupling: The split optical signal is output through the output fiber array, completing the splitting process.
3. Wavelength Insensitivity

The quartz waveguide efficiently splits optical signals in the 1260-1650nm band, eliminating the need for structural adjustments for specific wavelengths.

4. Difference from Fused-Band Taper (FBT) Splitters

The PLC Splitter utilizes semiconductor technology to achieve optical splitting, resulting in high stability and uniformity. FBT splitters, on the other hand, rely on fused-band taper technology, are wavelength-sensitive, and have a limited number of channels.

The key to this technology lies in the precision of the waveguide design and the reliability of the packaging process, ensuring low insertion loss (typically 3.5dB to 24dB) and high splitting uniformity (within ±0.5dB).
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কোম্পানির খবর-How does a PLC Splitter work?

How does a PLC Splitter work?

2025-07-31

The PLC Splitter (Planar Waveguide Splitter) operates based on integrated optical waveguide technology and the multimode interference effect. It achieves optical power distribution by fabricating a precise optical waveguide structure on a quartz substrate using semiconductor processing. The detailed principles are as follows:

1. Core Waveguide Structure
  • A Y-branching or multimode interference (MMI) waveguide design is employed. By controlling the waveguide paths etched into the quartz substrate, the input optical signal is proportionally distributed to multiple output ports.
  • The waveguide's refractive index profile (high-index core and low-index cladding) constrains the optical signal's propagation direction, reducing energy leakage.
2. Splitting Process
  • Input Optical Coupling: The input optical fiber is aligned with the waveguide chip via a spot mode converter (SSC), and the optical signal enters the Y-branch waveguide.
  • Power Distribution: Light waves interfere in the branch waveguides, and the waveguide width and branching angle are designed to achieve either equal (e.g., 1:2, 1:4, etc.) or unequal power distribution.
  • Output Coupling: The split optical signal is output through the output fiber array, completing the splitting process.
3. Wavelength Insensitivity

The quartz waveguide efficiently splits optical signals in the 1260-1650nm band, eliminating the need for structural adjustments for specific wavelengths.

4. Difference from Fused-Band Taper (FBT) Splitters

The PLC Splitter utilizes semiconductor technology to achieve optical splitting, resulting in high stability and uniformity. FBT splitters, on the other hand, rely on fused-band taper technology, are wavelength-sensitive, and have a limited number of channels.

The key to this technology lies in the precision of the waveguide design and the reliability of the packaging process, ensuring low insertion loss (typically 3.5dB to 24dB) and high splitting uniformity (within ±0.5dB).