Optical-Fiber Power Meter Comparison between NIST and KRISS

Area of Science:

• Metrology and Measurement Science
• Optical Engineering
• National Metrology Institutes

Background:

• Accurate optical power measurement is critical for telecommunications and photonics.
• International comparisons ensure consistency of measurement standards.
• National Institute of Standards and Technology (NIST-USA) and Korea Research Institute of Standards and Science (KRISS-R.O. Korea) are leading metrology institutes.

Purpose of the Study:

• To compare the national optical fiber power measurement reference standards of NIST-USA and KRISS-R.O. Korea.
• To assess the agreement between the two institutes' standards at specific wavelengths.
• To validate the accuracy and comparability of optical power measurements internationally.

Main Methods:

• Utilized a temperature-controlled optical trap detector for precise measurements.
• Conducted intercomparison of reference standards at 1302 nm and 1546 nm wavelengths.
• Analyzed measurement results to determine the difference between the laboratories' standards.

Main Results:

• The largest difference observed between NIST-USA and KRISS-R.O. Korea reference standards was less than 2.5 parts in 10^3.
• This difference was within the combined standard uncertainty (k=1) of the measurements.
• Demonstrated high agreement between the two national metrology institutes' standards.

Conclusions:

• The reference standards for optical fiber power measurements at NIST-USA and KRISS-R.O. Korea are in excellent agreement.
• The intercomparison validates the reliability of optical power measurements conducted by both institutes.
• This supports global consistency in optical metrology.