The Study Of Local Volume Holographic Grating Diffraction Properties And Its Integrated Modular Devices

In recent years, the production of compact and full of actinic light integrated devices and systems for its huge optical information processing and laser communications potential applications attract much attention. How to build multiple optical components on a single media surface and interior, building composite function of integrated optical systems simultaneously. The development of small and full photochemical free-space transmission is a three-dimensional optical system,Which has become the development direction of the integration of technology and the new generation of optical devices and systems research focus internationally.Currently, the local volume holographic recording has been widely studied, and is considered one of the most promising technologies, holographic storage is an important potential for integrated multi-functional three dimensional optical system.And the study of the characteristics of the recording system is also for many other fields of information optics, optical communications, etc. They have a broad impact.However, in practical applications, there are some key issues, erases the time of reading the stored information as a hologram(volatility), low diffraction efficiency,and so on. This diffraction characteristics of the material and light fold volume holographic grating recording local dynamics grating becomes the key to solving the problem. In this paper, an urgent problem for the local volume holographic grating integrated optical devices, specific studies conducted in three areas:(1)A detailed study of pulse shaping properties in crossed-beam volume gratings is performed. Analytical expressions for the profiles of the transmitted and diffractedbeams are obtained based on the modified coupled wave theory. The spatial and spectrum evolutions and the diffraction efficiency of the diffracted pulsed beams are discussed. It is shown that the profiles of diffraction pulses and the total diffraction efficiency are greatly affected by the grating size, recording angle and refractive-index modulation. The studies indicate that the shaping properties for different geometry parameters of the crossed-beam volume gratings are different.However, this difference can be used for many special pulse shaping applications.(2)The formation dynamics of crossed-beam photorefractive gratings formed by the in Fe doped Li Nb O3 crystal is studied based on jointly solving the material equations and the two-dimensional coupled-wave theory. The numerical calculations of the temporal and the spatial evolutions of the space-charge field and the light modulation depth are given, and the influence of the recording conditions, including the recording wavelength, the two-dimensional sizes of the holographic grating are presented, and the time evolution of diffraction efficiency during holographic recording is also presented.(3)Through the study of the diffraction characteristics is more than local volume holographic, A pulse shaping filter device of tunable ring cavity was invented, its basic principle is formed by five gratings perpendicular recording structure. By adjusting the distance between crossed-beam volume gratings, to achieve the pulse shaping filter laser. The success of the research on the local volume holographic diffraction device is applied to the device designs.