Abstract
A practical absolute wavelength meter was assembled separately a reference wavelength source and wavelength measurement system. The frequency (wavelength) stability was obtained to be 2×10-12 for a reference wavelength source. The other hand accuracy of wavelength measurement was estimated to be ** Michelson interferometer with vacuum chamber. The wavelength was estimated to be 1523.48813 nm for a 1523nm He-Ne laser as test laser. Moreover, the pressure dependence for wavelength was measured to be 0.0044 [pm/hPa]. Measurement reproducibility of the wavelength meter was guaranteed to be ±0.035pm.
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