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Openai/69109937-2170-8005-9304-da49840bb5b9
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===== 1. Tolerance stack-up: Even sub-micron mechanical errors can affect coupling efficiency, particularly in very high-speed or high-power applications. ===== # Laser variability: Active alignment compensates for slight variations in laser emission point, angle, or wavelength that passive designs canβt dynamically correct. # Performance ceiling: Some believe that in ultra-high-density or long-haul telecom applications, active alignment may still deliver slightly better coupling efficiency (e.g., 0.2β0.3 dB better), which matters for very tight power budgets.
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