To connect an ST fiber optic interface, align the connector with the adapter, insert it, and twist the bayonet lock a quarter-turn until it clicks.

Step-by-Step Instructions

1. Prepare the Connector Remove the dust cap from the ST connector to expose the ferrule. Ensure the connector and adapter are clean using a fiber optic cleaning kit or lint-free wipes with >91% isopropyl alcohol, as dirt can cause signal loss or damage the fiber end face .
2. Align the Connector Position the ST connector so that the bayonet latch aligns with the slot on the adapter. The ST connector has a round metal body with a 2.5mm ferrule that holds the fiber core in precise alignment .
3. Insert the Connector Gently push the connector straight into the adapter. Avoid forcing it, as misalignment can damage the ferrule or the adapter sleeve .
4. Engage the Bayonet Lock Twist the connector a quarter-turn clockwise until you hear or feel a click. This secures the spring-loaded ferrule in place, maintaining precise alignment and minimizing signal loss .
5. Verify Connection Check that the connector is fully seated and locked. If the signal shows high loss, disconnect, clean the ferrule and adapter again, and reconnect .
6. Safety Precautions
   • Never look directly into the fiber end, as laser light can damage your eyes .
   • Handle fiber ends carefully to avoid breakage or injury from sharp glass fragments .
   • Always discard used cleaning sticks and wipes to prevent contamination .

Additional Tips

• ST connectors are compatible with both single-mode and multi-mode fibers, making them versatile for LANs, telecom networks, and fiber optic instruments .
• Regular inspection and cleaning of connectors and adapters help maintain low insertion loss and high signal integrity .
• Avoid connecting two male or two female ends together, as this can damage the ferrules and result in high insertion loss . By following these steps, you can ensure a secure, low-loss connection for your ST fiber optic interface.