Apparatuses and methods for analyzing multiple optical signals in parallel

A method comprising:

• controlling a mask to spin at a frequency, the mask allowing a first portion of light incident on the mask to pass through the mask, and blocking a remaining portion of the light incident on the mask, based on a pattern on the mask, the light being carried and output by optical fiber channels input into optical fiber ports;
• detecting, via a photodetector, the allowed first portion of the light as input signals;
• transforming the input signals to a frequency domain, to obtain measured signals in frequencies respectively corresponding to the optical fiber channels;
• and
• determining whether each of the measured signals is a failure by comparing the obtained measured signals with a threshold signal.

A non-transitory computer-readable medium comprising instructions, which, if executed by a processor, cause the processor to:

• control a mask to spin at a frequency, the mask allowing a first portion of light incident on the mask to pass through the mask, and blocking a remaining portion of the light incident on the mask, based on a pattern on the mask, the light being carried and output by optical fiber channels input into optical fiber ports;
• detect, via a photodetector, the allowed first portion of the light as input signals;
• transform the input signals to a frequency domain, to obtain measured signals in frequencies respectively corresponding to the optical fiber channels;
• and
• determine whether each of the measured signals is a failure by comparing the obtained measured signals with a threshold signal.