How to use the fiber optic splice box gel
Fiber optic splice box gel is applied to protect splices from moisture, dust, and mechanical stress while ensuring optimal light transmission.
Purpose of the Gel
Fiber optic splice box gel serves as a protective and index-matching medium. It fills gaps between fiber ends in mechanical splices, reducing back reflection and insertion loss by matching the refractive index of the fibers. Additionally, the gel absorbs mechanical stress caused by vibration, thermal expansion, or shock, preventing fiber breakage and maintaining long-term reliability .
Preparation
- Clean the fibers: Remove any water-blocking or petroleum-based gel from the fiber coating using a lint-free cloth and compatible cleaning agent. Avoid soaking the fiber, as solvents can swell the coating .
- Strip the protective coating: Expose the bare fiber ends carefully without nicking or damaging the glass core .
- Prepare the splice tray or closure: Open the splice box or gel dome closure and organize the fiber routing according to the manufacturer's instructions .
Applying the Gel
- Mechanical splices: Place a small amount of index-matching gel into the splice cavity before inserting the fibers. The gel should cover the fiber ends without overflowing, ensuring a seamless optical path .
- Gel dome closures: Fill the closure with the gel to encase the splices and cable entries, conforming to the shape of the fibers and sealing gaps to prevent moisture and dust ingress .
- Avoid contamination: Use clean tools and gloves to prevent dirt or debris from entering the gel, as contamination can reduce optical performance .
Final Steps
- Insert fibers into the gel: Carefully place the spliced fibers into the gel-filled cavity or tray, ensuring proper alignment.
- Seal the closure: Close the dome or box according to the manufacturer's instructions, ensuring the gel remains in place and the closure is airtight .
- Check for excess gel: Remove any surplus gel from the edges to prevent leakage or contamination.
Maintenance and Re-entry
Gel-based closures allow easy re-entry for maintenance or network expansion. When reopening, clean the gel surface and fibers carefully to maintain performance . Avoid prolonged exposure to dirt or dust, as this can compromise the gel's protective properties. By following these steps, the fiber optic splice box gel will provide long-term protection, mechanical stress relief, and optimal optical performance for your fiber network.
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