The Design And Implementation Of Integrated Optical System For Atom Interferometers

The gravity gradiometer can be used to directly measure the third-order derivative of the gravitational potential, its spatial resolution is better than normal gravity measurements, and it thus has great significance and broad application prospect in resource exploration, environmental monitoring, geophysical research and other fields.The atom gravity gradiometer scheme based on dual-synchronous differential cold atom interferometers is the most potential one. However, as the core component of the entire instrument, the optics system of an atom interferometer is complex and large, it is unable to meet the needs of transportable and practical. To solve this problem, we have overcome a series of technical bottlenecks in the miniaturization of laser and optical elements, design and implement a set of integrated, transportable and environment adaptable optical system, which lay a solid foundation for engineered and practical atom gravity gradiometer in the future.The main achievements include follows:1) Successfully developed a series of miniaturized semiconductor lasers and Laser Power Amplifier, designed and implemented a set of miniaturization technology programs for optical components.2) Implemented a set of integrated optical systems, and simulation analysis and quadratic optimization of their mechanical and thermal stability. Optimized optical system has a high stability, the current optical output power of 1 month varies by less than 5%.3) Design and implement a fiber optic splitter module, the module has been tested at70 Kg weight conditions and temperature conditions at change of 20?C, optical output power variation were less than 6% and 10%, the test results show that the spectral module has a good environment adaptability.