optical physics
2.Six years ago, optical frequency combs based on femtosecond Kerr-lens mode-locked lasers were introduced into the field of optical frequency metrology by merging ultra-fast (in the time domain) and ultra-stable (in the frequency domain) techniques, which realized the precise control of the electric field of lasers both in the time domain and in the frequency domain, and have firmly established their role in ultra-precise and ultra-fast physics.
3.Polarized light in the extreme ultraviolet (EUV) and soft X-ray range is a valuable tool in the investigation of magnetic materials and magneto-optical effects, measurement of Faraday and Kerr effects, and polarization analysis of the synchrotron radiation. These polarizing measurements could be used in the study of a wide range of phenomena in biology, chemistry, physics, and material science.
4.Coupled rate equaiton for passive or self Q switched solid state lasers is studied in physics and mathematics methods. The formula about relationship to repetition rate of the pulses and optical parameters of the lasers has been derived,by means of the adiabatic elimination approximation (AEA) and the Hopf bifurcation condition.
5.On the basis of theories of physics,geometrical optics and photometry,the optical properties of collimated light beam incident upon single fiber perpendicular to the fiber axis are studied.By exploring the behaviors of reflected light and transmitted light from single fiber,the distribution of the light is described and the proportionalities between the intensity of the reflected,transmitted and scatered light are obtained respectively,and the different laws governing the intensity of diffused light and transmitted light from single fiber between near and far field are discussed.Experiments demonstrate that the decrease of projecting light in far field is in direct proportion for the increase of fiber diameter,which serves as the theoretical basis for a series optics equations,as well as for the designment for photoelectric deviccs for detecting fibers.
