After nearly 20 years of hard work and a series of technical breakthroughs, scientists led by ZHANG Xuejun from Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP) of the Chinese Academy of Sciences (CAS) have successfully created the world’s largest SiC aspheric mirror, which boasts an impressive diameter of 4 meters.
Optical frequency comb, a Nobel Prize-winning device, can emit numerous evenly spaced and phase-coherent laser lines simultaneously. Besides metrology, attosecond science, and optical communication, frequency comb has recently become an extremely powerful tool for high-precision spectroscopy.
Solar spectral irradiance (SSI) is a key parameter to study the composition, temperature, and dynamics of the Sun over time. An accurate SSI model leads to a better understanding of solar activity.