Design of accurate optical fiber power meter

The circuit principles and singlechip data processing program for the optical power meter are illumi- nated.A kind of optical element with high sensitivity and reliability is choosen for the circuit design.The ele- ment is photodiode-FU15PD which insures the transferring optic reliability in receiving optical fiber.A 16 bits A/D chip CS5529 and a high speed singlechip AT89C51 are used for achieving high measuring accuracy and high computing rate.High performance was been achieved with the above three high performance ele- ments,and this method has been used in practice.