Light energy per unit time.
A power is measured in watts = joules / second. In optical communications, powers is calculated dBm.
Optical Power Meter
An optical power meter is an instrument used to measure the optical power in a light beam.
Optical Power Measurement
Optical power meter comes with a sensor head.Some optical instruments measure the heat (work for high power lasers) and some are based on photo diode circuitry (for the low power levels used in fiber optic communication systems).
Optical power meters use optical detectors (photo diode) to detect light energy and power levels. Mostly detectors are based on:
- silicon (Si)
- Germanium (Ge).
- Indium-Gallium-Arsenide (InGaAs).
A PN junction device that conduct current when exposed to light energy. It converts light energy into electrical energy.
Video Source # 2
Posted by Technology guide in Urdu and Hindi on Tuesday, April 14, 2020