A laser wavelength meter was calibrated to ±1 MHz 1\(\sigma\) using transitions in molecular iodine at around 700 nm, where precise experimental measurements of iodine lines are sparse. Two saturation absorption spectroscopy systems were used to measure and characterize the R(118)(2-8) a₁₀, R(54)(3-9) a_1, and P(48)(3-9) a₁₅ hyperfine lines of molecular iodine near 700 nm. The transition frequencies were measured using a frequency comb and used to calibrate the wavelength meter. Additionally, the full hyperfine spectrum of the R(54)(3-9) transition was obtained and fitted using a theoretical model allowing for hyperfine coupling constants to be deduced, which agreed with theoretical values.

使用分子碘在 700 nm 附近的跃迁将激光波长计校准到 ±1 MHz 1 \(\sigma\)，其中碘谱线的精确实验测量很少。两个饱和吸收光谱系统被用于测量和表征R（118）（2-8）一₁₀，R（54）（3-9）一个_1，和P（48）（3-9）一个₁₅超精细700 nm 附近的分子碘谱线。使用频率梳测量跃迁频率并用于校准波长计。此外，获得了 R(54)(3-9) 跃迁的完整超精细光谱，并使用理论模型拟合，允许推导超精细耦合常数，这与理论值一致。