Approaching the Quantum‐Limited Precision in Frequency‐Comb‐Based Spectral Interferometric Ranging (Laser Photonics Rev. 19(11)/2025)

Toward Realizing Length Standards In article number 2401995, Yoon‐Soo Jang and co‐workers present distance measurements using frequency‐comb‐based spectral interferometry with sub‐nanometer precision close to a standard quantum limit and a study of the fundamental limit of its measurement precision. This study will be an important step toward the practical realization of upcoming length standard.