Partially Coherent Light In The Transmission Spectra Of The Spectral Changes And Spectral Switch

Because the laser has high power, high-density characteristics, the current field of laser physics research is a hot spot. Derived from the laser is basically a part of the coherent laser light, the current scholars of partially coherent light of a substantial amount of research done. In some applications, the partially coherent light than the more fully the advantages of coherent light, partially coherent light in the atmosphere transmission less susceptible to atmospheric disturbances, light intensity distribution more uniform and there is to eliminate or reduce the advantages of speckle.Spectroscopy is widely used in metallurgy, geology, high-precision measurements, the areas of astrophysics, so spectral analysis is a scientific analysis of a more important. Previously thought in a free space optical transmission, the spectrum is to maintain the same. Until the United States in 1986, the famous Professor Wolf optical experts proved: When the spectra of coherent light sources to meet the scaling law degrees from the light source in the transmission spectrum to maintain unchanged. Instead, from the scaling violation of the law of the light source during transmission, the spectrum will change. This phenomenon is known as correlation-induced spectral changes. After the researchers found that when scaling to meet the law of partially coherent light diffraction by fiber optic cable, the light field in the diffraction spectra of the changes will also appear. This is sometimes referred to as spectral changes in the diffraction-induced spectral changes.Researchers previously used by the majority of the partially coherent light are Gaussian - Shell model beam. Ponomarenko has recently introduced a new class of partially coherent light model, the beam can be Laguerre - Gaussian beams by superposition phase, known as partially coherent Bessel-Gaussian beams referred to as amended (MBGB).This paper introduced the theory of partially coherent light through the optical lens, aperture - lens separation system, Young's experiment and some far-field coherent light focused by the spherical aberration after lens spectral characteristics and spectral switches. And to check the parameters of the different spectra of the number and location of switches to change. Application of partially coherent light and the theory of matrix optical coherence on the part of the amendment sale Gaussian beams passing through an aperture - lens separation system changes in the spectra of an in-depth study results show that the sale of partially coherent Gaussian beam through amendments aperture - lens separation system will switch spectrum.