How to distinguish between good and bad AOC jumpers

　　As a short-distance high-speed data tranSMission solution, the quality of AOC jumpers directly affects network stability. The following is The core methods for distinguishing the quality of AOC jumpers, combining professional standards with practical experience:

　　Key indicators of transmission performance

　　Insertion Loss (IL)

　　Quality standards: single-mode ≤ 0.2dB, multi-mode ≤ 0.3dB (maximum value does not exceed 0.5dB).

　　Test method: Use an optical power meter to measure the power attenuation of the signal after passing through the jumper, and the lower the value, the better.

　　Return Loss (RL)

　　Quality standards: single-mode PC type ≥ 45dB, APC type ≥ 60dB; multi-mode ≥ 20dB.

　　Meaning: reflects the degree of signal reflection. The higher the value, the smaller the signal reflection and the more stable the transmission.

　　Repeatability/Interchangeability

　　High-quality standard: loss change after 1000 plugging and unplugging is less than or equal to 0.2 dB.

　　Test method: Re-measure IL/RL after multiple plugging and unplugging, and observe the numerical fluctuation.

　　II. Material and process details

　　fiber grade

　　Premium choice: Class A fiber, supports OM3/OM4/OM5 multimode or OS2 single-mode standards.

　　Pit avoidance tip: Inferior products may be impersonated with C/D grade fiber, resulting in high attenuation and short range limitations.

　　Sheath and Reinforcement

　　High-quality materials: low-smoke halogen-free polyolefin sheath (flame retardant, non-toxic), aramid reinforcement (strength is 5-6 times that of steel wire).

　　Inferior replacement: polyester yarn replaces aramid (easy to break), PVC sheath (toxic to burn).

　　end face processing

　　Precision process: 3D interferometer detects end face curvature radius, vertex offset (≤ 50μm), and fiber height to ensure no air gap docking.

　　Inferior performance: end face scratches, core shift, resulting in high loss and signal fluctuations.

　　III. Compatibility Verification

　　device interoperability

　　Test method: Connect the mainstream switch/server, read the EEPROM information, and confirm that the field meets the technical specifications (such as wavelength 850nm, length matching).

　　stability test

　　Extreme conditions: through -5 ° C to 50 ° C cycles for 48 hours, no packet loss; after 20 hot swappings, the flow rate is switched normally.

　　IV. Brand and certification

　　Preference: Brands that have passed RoHS (environmental protection) and IEC 61753-1 (plug-in life ≥ 500 times) certification, such as Lvlian, Acer, etc.

　　Pit avoidance tips: Products without certification and abnormally low prices should be cautious, and recycled optical modules or second-hand ferrules may be used.

　　V. User evaluation and actual measurement

　　Real feedback: Check user reviews and focus on transmission stability, packet loss rate, and heat generation.

　　Field testing: Use OTDR (Optical Time Domain Reflectometer) to detect cable attenuation, and verify the actual bandwidth with an optical power meter.

　　suMMarize

　　High-quality AOC jumpers need to meet three core standards: low loss, high stability, and strong compatibility. It is recommended to pass brand certification + key parameter testing + user reputation Comprehensive judgment to avoid selecting products with false parameters or rough craftsmanship.