We report the Sr-87 optical lattice clock at NIM with a clock laser referenced to a 30 cm ULE cavity. Several improvements, such as the atomic tempera......
Light-emitting diode (LED) standard lamps are interesting since the traditional incandescent standard lamps for photometry are difficult to obtain. Ma......
We used absolute primary acoustic gas thermometry (AGT) to calibrate a Pt-Co resistance thermometer on the thermodynamic temperature scale by measurin......
Blackbody radiation (BBR) temperature and its uncertainty mainly contribute to the BBR shift uncertainty, which is one of the challenges in most ion o......
The air piston gauge (APG) has been established at the National Physical Laboratory, India (NPLI) for Pascal realization since 2002. The APG at NPLI h......
The Newtonian gravitational constant G has proved to be one of the most difficult constants to measure in physics. The improvement of measuring G with......
The Stark shift due to blackbody radiation (BBR) is a key obstacle limiting the frequency uncertainty of optical lattice clocks. A well-characterized ......
The coherent population trapping (CPT) atomic clock is very promising for use in next-generation spaceborne applications owing to its compactness and ......
In July 2016 the Consultative Committee for Thermometry's Non-Contact Thermometry Working Group formed a task group to compile a complete list of unce......
In this study, we realized the triple point (TP) temperature of sulfur hexafluoride (SF6) at the National Institute of Metrology (NIM), China. To this......
Underwater distance measurement has been playing an important role in the fields of underwater navigation, search and rescue, and bathymetric survey. ......
In the temperature range between 0.65 K and 1 K, the international temperature scale of 1990 (ITS-90) is based on He-3 vapour-pressure thermometers an......
The spectral optical radiant power of a quantum cascade laser (QCL) in the (7.35-10.6) mu m spectral range has been measured using a Y-shape absolute ......
