Ultraviolet double-optical-comb absorption spectrum measurement device and method based on heterodyne detection
A technology of absorption spectroscopy and heterodyne detection, applied in the fields of ultrafast optics and optical frequency combs, which can solve the problem that the high-precision spectral measurement technology is not very mature and does not fully utilize the time-frequency domain advantages, measurement accuracy and accuracy of the ultraviolet comb light source The problem is not high, and the effect of avoiding mechanical scanning, fast measurement speed and simple structure is achieved.
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[0025] Example: such as figure 1 , 2 As shown, this embodiment specifically relates to a device for measuring ultraviolet double-comb absorption spectroscopy based on heterodyne detection, which mainly includes a femtosecond mode-locked pulse laser group, a femtosecond laser pulse amplifier group, Pulse time-frequency domain control system group, nonlinear spectral transformation system group, and sample measurement and analysis system9.
[0026] Such as figure 1 , 2 As shown, the femtosecond mode-locked pulse laser group includes two femtosecond mode-locked pulse lasers, which are respectively the first laser 1 and the second laser 2. The femtosecond mode-locked pulse laser is a nonlinear polarization rotation mode-locked fiber laser, a semiconductor can One of the mode-locked fiber lasers with saturable absorber mirrors or fully polarization-maintaining nonlinear fiber loop mirror mode-locked lasers. In this embodiment, a nonlinear polarization rotation mode-locked fiber ...
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