Polishing Process & Recommended XYT Lapping Films for Fiber Optic Connectors
XYT Lapping Films provide high-precision, repeatable polishing for fiber optic connectors, ensuring low insertion loss and high return loss. Below is a detailed polishing guide for various connector types:
- SC, LC, FC, ST, MU (PC/APC) Connectors
- MTP, MPO, MTRJ (MM/SM, PC/APC) Connectors
1️⃣ Polishing Process for SC, LC, FC, ST, MU Connectors
➡️ PC (Physical Contact) & UPC (Ultra Physical Contact) Polishing
PC/UPC polishing focuses on achieving a flat but convex fiber end-face with high return loss.
| Step | Film Type | Grit Size (µm) | Purpose |
|---|---|---|---|
| Coarse Grinding | Diamond (Metal Bond) | 30µm, 9µm | Ferrule shaping, material removal |
| Fine Polishing | Diamond (Resin Bond) | 3µm, 1µm | Scratch removal, geometry refinement |
| Pre-Final Polishing | Diamond, Aluminum Oxide | 1µm, 0.3µm | Surface smoothing |
| Final Polishing | Silicon Dioxide | 0.5µm, 0.02µm | Mirror finish, high return loss (>55dB) |
🔹 Final Target: Return Loss >50dB for PC, >55dB for UPC
➡️ APC (Angled Physical Contact) Polishing (8° Angle)
APC connectors require a precise 8° angled ferrule end-face for minimal back reflection.
| Step | Film Type | Grit Size (µm) | Purpose |
|---|---|---|---|
| Coarse Grinding | Diamond (Metal Bond) | 30µm, 9µm | Initial shaping at 8° angle |
| Fine Polishing | Diamond (Resin Bond) | 3µm, 1µm | Surface refinement |
| Pre-Final Polishing | Diamond, Aluminum Oxide | 1µm, 0.3µm | Preparing for final step |
| Final Polishing | Silicon Dioxide | 0.5µm, 0.02µm | Achieving superior return loss |
🔹 Final Target: Return Loss >65dB (APC Standard)
2️⃣ Polishing Process for MTP, MPO, MTRJ Multi-Fiber Connectors
MPO/MTP connectors have multiple fibers, requiring highly precise end-face geometry for proper alignment and optical performance.
➡️ MPO/MTP MM (Multimode) PC Polishing
Designed for high-performance data transmission in short-distance applications.
| Step | Film Type | Grit Size (µm) | Purpose |
|---|---|---|---|
| Coarse Grinding | Silicon Carbide (Metal Bond) | 30µm, 15µm, | Material removal, ferrule leveling |
| Fine Polishing | Silicon Carbide (Resin Bond) | 9µm, 6µm | Surface preparation |
| Pre-Final Polishing | Silicon Carbide, Aluminum Oxide | 3µm, 1µm | Uniform ferrule surface |
| Final Polishing | MPO CE/SiO2 Flock Lapping Film | 0.5µm | Ensures ‘0’ coredip for all fibers |
🔹 Final Target: End-face geometry within spec, insertion loss <0.35dB
➡️ MPO/MTP SM (Single Mode) APC Polishing
Designed for long-haul, high-speed fiber transmission with an 8° angle to reduce back reflection.
| Step | Film Type | Grit Size (µm) | Purpose |
|---|---|---|---|
| Coarse Grinding | Silicon Carbide (Metal Bond) | 30µm, 15µm | Precise 8° angle shaping |
| Fine Polishing | Silicon Carbide (Resin Bond) | 9µm, 6µm | Scratch removal |
| Pre-Final Polishing | Silicon Carbide, Aluminum Oxide | 3µm, 1µm | Smoothing before final step |
| Final Polishing | MPO CE / SiO2 Flock Lapping Film | 0.5µm | Ensures consistent end-face geometry |
🔹 Final Target: Return Loss >65dB, perfect multi-fiber alignment
🔹 Summary Table of Recommended XYT Lapping Films
| Connector Type | PC/UPC Process | APC Process | MTP/MPO MM (PC) | MTP/MPO SM (APC) |
|---|---|---|---|---|
| Coarse Grinding | 30µm, 15µm, 9µm Diamond (Metal) | 30µm, 15µm, 9µm Diamond (Metal) |
30µm, 15µm Silicon Carbide (Metal) |
30µm, 15µm Silicon Carbide (Metal) |
| Fine Polishing | 9µm, 3µm Diamond (Resin) | 9µm, 3µm Diamond (Resin) | 9µm, 6µm Silicon Carbide (Resin) | 9µm, 6µm Diamond (Resin) |
| Pre-Final Polishing | 1µm, 0.3µm Aluminum Oxide | 1µm, 0.3µm Aluminum Oxide | 3µm, 1µm Silicon Carbide, Aluminum Oxide | 3µm, 1µm Silicon Carbide, Aluminum Oxide |
| Final Polishing | 0.5µm, 0.02µm Silicon Dioxide | 0.5µm, 0.02µm Silicon Dioxide | MPO CE Flock Lapping Film | MPO CE Flock Lapping Film |
Would you like further customization for specific machines or polishing setups? 🚀
4-Stage MPO/MTP Polishing Process with Di-Water:
✔ SiC 15B → SiC 3D → SiC 1A → CE0.5B Flocked
3-Stage MPO/MTP Polishing Process with Slurry:
✔ SiC 15B → SiC 3D → Black Cloth with CE0.5B Slurry
Our Polishing Films Provide:
✅ High Pass Rate Performance – Consistently high-quality end-face finishing
✅ Cost-Effective Solution – More efficient use of PET sheets or Just 3-4 stage, reducing costs.
✅ Geometry Meets IEC & GR-326 Standard – Ensures industry-standard optical performance
✅ RoHS & REACH Certified by SGS Lab – Fully compliant with environmental regulations
✅ Stable & Durable – Long-lasting film with precise, repeatable results
Let us know your specific requirements, and we will provide free samples and technical support tailored to your needs.
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Telecommunications
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Automotive
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Roller finishing
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Electronics
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Semiconductors
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Aerospace
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Optical Glass Crystal
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Jewellery lapidary
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Medical
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Oil & Gas
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Food Processing
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Furniture and Wood industry
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Metals Finish
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Fiber Optics Polishing
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Music industry
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LED LCD Panel
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Mobile Phone Industry
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Watch
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Printing and Paper industry
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Engine and Machine parts
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Hydraulic components
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Pneumatic components
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Ball bearings
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Gear and Train components
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Moulds
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Cranks Cams and Steering devices
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Dental Polishing
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Knife Blade Tools sharpening
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Hard disks and Magnetic head
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Other parts end face polishing
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