What is a Fiber Optic Quick Connector?
A fiber optic quick connector (also called a field-assembly connector or cold splice connector) allows technicians to terminate fiber cables on-site without epoxy or polishing. It contains a factory-polished ferrule inside, and the field fiber is simply inserted and locked in place. This dramatically simplifies FTTH deployment.
Cold Splicing vs Fusion Splicing
Cold Splicing (Mechanical):
- ✓ No fusion splicer needed — low tool cost
- ✓ Simple operation, 2-3 minutes per termination
- ✓ Perfect for field work and emergency repairs
- ✗ Slightly higher insertion loss (0.3-0.5dB)
Fusion Splicing:
- ✓ Very low insertion loss (0.03-0.05dB)
- ✓ Permanent, stable connection
- ✗ Splicer costs $3,000-$15,000
- ✗ Requires power, training, and maintenance
For most FTTH installations, cold splice quick connectors offer the best value. Our ESC250D-APC fiber quick connector has sold 17,000+ units and is trusted by field technicians worldwide.
Tools You Will Need
- Fiber cleaver (essential — quality matters for clean end faces)
- Fiber stripping pliers (for jacket and coating removal)
- Alcohol wipes or lint-free wipes (for cleaning fiber)
- Length gauge/template (for controlling bare fiber length)
- SC/APC quick connectors (e.g., ESC250D-APC)
Installation Steps
Step 1: Thread the Boot
Slide the connector boot and rubber boot onto the fiber cable in the correct orientation (threads facing the cable end).
Step 2: Strip the Fiber
Using fiber strippers, remove approximately 45mm of outer jacket and coating. First remove the outer jacket, then the tight buffer, and finally the 250μm coating to expose the bare fiber. Keep the fiber straight throughout.
Step 3: Clean the Fiber
Wipe the bare fiber with an alcohol wipe or lint-free cloth soaked in isopropyl alcohol. Wipe in one direction only. Do not touch the cleaned fiber.
Step 4: Cleave the Fiber
Using a quality fiber cleaver, cleave the fiber at approximately 12mm from the bare fiber end. Make a single, clean cut — do not cut twice. The end face should be flat with no chips or cracks.
Step 5: Check Cleave Quality
Use a microscope to inspect the fiber end face if available. Cleave quality directly affects insertion loss.
Step 6: Insert the Fiber
Gently insert the cleaved fiber into the guide hole at the back of the connector. Push slowly and steadily until you feel slight resistance — this means the fiber has reached the pre-polished stub inside. Continue gentle pressure until the fiber bends slightly, confirming full contact.
Step 7: Secure the Connector
Press down the connector clamp or locking mechanism to secure the fiber. Then tighten the boot cap onto the connector body until snug.
Step 8: Attach the Housing
Snap the outer SC housing onto the connector body. You should hear a click when locked. Gently tug the cable to verify it is secure.
Post-Installation Testing
- Visual Inspection: Check for visible damage
- Light Test: Use a visual fault locator (red laser) to check continuity
- OTDR Test: Measure insertion loss with an OTDR — target under 0.5dB
FAQ
Q: Insertion loss is too high?
A: Re-cleaving the fiber with a clean cut and re-terminating usually fixes this.
Q: No light passing through?
A: The fiber may not be reaching the internal stub. Try inserting the fiber deeper.
Q: Can these connectors be reused?
A: Most quick connectors are single-use. Use a new connector for re-termination.
Summary
Fiber quick connectors are essential tools for FTTH deployment. Proper technique and quality tools are key to reliable terminations. For large deployments, consider training all installers before starting.
Langzhi Technology offers high-quality ESC250D-APC fiber quick connectors and accessories. Contact us for more information.
