To provide an optical pulse wavelength measuring instrument by optical sampling with which the S/N ratio of a sampling value can be improved by highly efficient optical sampling, and the measurable wavelength range can be expanded.
A second higher harmonic light (2ωsam in optical frequency) of a sampling light is generated by a cascade x(2) process as a non-linear optical material and simultaneously a cross-correlation signal light corresponding to the difference between an optical frequency of the second higher harmonic light generated and an optical frequency of light to be measured is generated, or a second higher harmonic light (2ωsig in optical frequency) of the light to be measured is generated and simultaneously the cascade x(2) material that generates a cross-correlation signal light corresponding to a difference between the optical frequency of the second higher harmonic light generated and an optical frequency of the sampling light is used. The cross-correlation signal light generated by the cascade x(2) process is converted into an electric signal to display a pulse wavelength of the light to be measured by processing the signal.
YAMAMOTO TAKASHI
NAKAZAWA MASATAKA
