Studies On The Coherent Combination And Measurement Of The Femtosecond Laser Pulse

The future trend of the development of femtosecond pulse is amtosecond pulse, the advancement of the pulse measurement and coherent combination technology has promoted the development of the Ultrafast optics. In this thesis, I sumerize my work on anasysing the probability of amtosecond laser from the combination of independent lasers, discussing the contribution of the inicial paramenters of two independent lasers on combinationate pulse. I also introduce my work on the development of the software of SPIDER apparatus which is widely used to evaluate the spectrum phase and domin information of the monocycle pulses. The main content of the thesis are as follows:1. Basede on the autocorrelation measurement and principle of lasers coherent combination, numerical anasys how the time synchronization, carrier envlope phase, Spectrum, chirp contribute to the coherent combination pulse, come up with the method to combine two lasers with pahse control but with out strictly frequency comb coincidence, anasys the principle of difference between the output of the combined lasers and ordinal lasers, prepare a theory fundamention for the experiments of the coherent combination of lasers.2. Develop the utility software of SPIDER apparatus. Combined with existing FFT transform filter, we insert the new wavelet transform filter method, anasys the characteristic of wavelet transform. Based on the algorism, we development the excutive programe on the Visual C++ workspace, introduce the parements set and and opreration of the programe, anasys the different reconstruct result response to these parameters. In the software, we set the noise control choice, precise control, and the menu for data file save, the beatutiful and friendly interface, upgrade the precise and utility of the SPIDER apparatus.