An optical power meter is the most common type of test equipment used to support fiber optic system. NIST developed a testing system to provide absolute power calibrations for optical power meters. These measurements are accomplishe. An optical power meter is the most common type of test equipment used to support fiber optic system. NIST developed a testing system to provide absolute power calibrations for optical power meters. These measurements are accomplished using either collimated-beam or connectorized-fiber configurations at the three principle wavelength regions used by. The C-series calorimeter was designed to measure the electromagnetic radiation produced by CW (continuous wave) laser sources in the power range 1 mW to 1 W at wavelengths ranging from ultraviolet to the near infrared. The calorimeter was constructed to accommodate the unique characteristics of laser radiation (nonuniform profiles, temporal and spa. The device presently used as a transfer or laboratory standard for optical power calibrations is a commercially available, electrically calibrated pyroelectric radiometer (ECPR). This device was originally designed and built by NIST scientists. The pyroelectric sensor is made of lithium tantalate covered with gold-black. The gold-blackcoating (abou. To minimize measurement errors associated with the source wavelength and the detector spectral responsivity, tunable laser sources are installed int he measurement system. The gain medium of the tunable laser is a conventional laser diode but the internal Fabry-Perot resonator is disabled by an anti-reflection coating on one of the facets. An exter. Figure 6shows the configuration of the system used for connectorized fiber measurements during the calibration of optical fiber power meters. The ECPR transfer standard is used as the reference for these calibrations. The system contains several laser source plates, a connector converter stage (for connectorized measurements), lenses (for parallel.
