An 优发手机版优发28优发 (OPM) is a device used to measure the power in an optical signal. it is widely used in Fiber optical communication area. By measuring the absolute power of the transmitter or optical network, an 优发手机版优发28优发 can evaluate the performance of the optical equipment. Using an 优发手机版优发28优发 in combination with a stabilized light source can measure connection loss, verify continuity, and help evaluate fiber link transmission quality.