Which is the correct order of the loss size of the optical fiber connection point?

Question

Options

• AActive connection> cold connection> welding
• BActive connection> fusion splicing> cold splicing
• CWelding>Cold Splicing>Activity Connection
• DCold connection>Activity connection>Welding

• A
  75% (48)
• B
  6% (4)
• C
  16% (10)
• D
  3% (2)

Explanation

Option A is correct because optical fiber connections lose signal in direct proportion to how physically imperfect the join is - active (plug-in) connectors introduce the most loss due to air gaps, surface roughness, and misalignment inherent in removable interfaces, while cold (mechanical) splicing is better since the fibers are held in close alignment, and fusion/welding splicing produces the least loss by melting the fibers together into a nearly seamless glass joint. Option B is wrong because it swaps cold splicing and fusion splicing - fusion splicing always outperforms mechanical cold splicing in loss, so it should be last (lowest loss), not second. Option C is entirely reversed, incorrectly placing welding (the best method) at the top as if it were the worst. Option D incorrectly elevates cold connection above active connection, when in reality removable active connectors consistently have higher loss than fixed mechanical cold splices.

Memory tip: Think of permanence = performance - the more permanent and "melted together" the connection, the less light escapes. Rank by how hard it is to undo: plug in (easiest) → clamp (harder) → weld (permanent) maps directly to most loss → less → least.

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