ELECTROMAGNETIC POWER MEASUREMENT AND REPORTING

摘要

A method to measure and report electromagnetic radiation power includes receiving electromagnetic radiation and generating an electrical signal having a magnitude based on the power of the electromagnetic radiation. An adjustable gain may be applied to the electrical signal to generate an amplified electrical signal that may be sampled to generate a digital sample. The adjustable gain may be controlled based on the value of the digital sample and the digital sample may be associated with a gain value. One or more calibration factors may be selected based on the gain value associated with the digital sample and the selected calibration factor(s) may be used to calculate the power of the electromagnetic radiation.

主权项

1. A method, comprising:
receiving an optical signal; generating an electrical signal in response to the optical signal, a magnitude of the electrical signal based on a power of the optical signal; applying an adjustable gain to the electrical signal to generate an amplified electrical signal; sampling the amplified electrical signal to generate a digital sample of the amplified electrical signal; and controlling the adjustable gain applied to the electrical signal based on a value of the digital sample to substantially maintain the value of the digital sample within a particular resolution zone of an analog-to-digital converter, wherein controlling the adjustable gain comprises:
comparing the value of the digital sample with a high threshold digital sample value:comparing the adjustable gain with a low threshold gain value; andin response to the value of the digital sample exceeding the high threshold digital sample value and the adjustable gain exceeding the low threshold gain value, decreasing the adjustable gain.