The polarization maintaining Fiber Coupled Diode Laser is an optocoupler made of polarization maintaining fiber. It is a key device to realize polarization coupling, spectroscopy and multiplexing. Its most important feature is the stable transmission of two orthogonal linearly polarized light, and can maintain their own polarization state unchanged, thus becoming a variety of military interference sensors and coherent communication key components, is to constitute high-precision high-performance fiber Gyro and hydrophone one of the basic components.
Fiber Coupled Diode Lasers and fiber optic adapters are used to connect two independent fiber jumpers components, common in the patch panel or rack connector panel. If it is used to connect two identical fiber optic connectors (such as ST / ST SC / SC, etc.), it is called a coupler. If it is used to connect two different types of fiber optic connectors (such as ST / LC SC / LC) is called the adapter.
Fiber optic gyroscope, fiber optic hydrophone and other sensors in the military and civilian areas of the application of more and more widely, so that their performance requirements will become increasingly high. Among them, the optical Fiber Coupled Diode Laser is composed of these fiber optic sensor core components, its performance on the overall performance of fiber optic sensors a great impact.
The domestic Fiber Coupled Diode Laser is mainly made of single-mode optical fiber. The coupler has a simple process and low cost. However, due to its non-polarization preserving function, birefringence caused by external disturbances can cause the zero drift and signal of the optical fiber sensor Fading, resulting in the performance of the coupler is very unstable.
The polarization maintaining Fiber Coupled Diode Laser, which is made of polarization maintaining fiber, is a special kind of optical Fiber Coupled Diode Laser which has the property of keeping the polarization state of the linearly polarized light in addition to the function of the ordinary coupler combined with light splitting. Western developed countries have been on China's blockade of the polarization-maintaining Fiber Coupled Diode Laser development technology, therefore, polarization-maintaining Fiber Coupled Diode Laser analysis and research is of great significance.
At present, the performance of polarization maintaining Fiber Coupled Diode Laser is analyzed from three aspects: spectral ratio, extinction ratio and additional loss. The temperature characteristics of these three performance indexes are analyzed experimentally, and a convenient, intuitive and practical Fiber Coupled Diode Laser performance analysis platform is designed and used to analyze the temperature and temperature characteristics of the coupler. From the experimental analysis, the effect of the polarization change of the polarization maintaining Fiber Coupled Diode Laser on the performance of the fiber optic gyroscope is summarized, and the performance test of the self-made polarization maintaining Fiber Coupled Diode Laser is carried out. The excellent polarization maintaining Fiber Coupled Diode Laser is selected for the fiber optic gyroscope or Other equipment.
In order to meet the requirements of these different applications, in recent years, researchers continue to influence the coupling of the coupler in the process of manufacturing these couplers, which are influenced by many factors, including production processes, control parameters, and sophisticated equipment and many other problems. Manufacturing process and process control methods for more and more in-depth study and research.
As the polarization maintaining Fiber Coupled Diode Laser in the molten state is difficult to determine the material changes, and its use of the polarization-maintaining fiber used in the production of a special stress structure, therefore, compared to ordinary single-mode coupler, Fiber Coupled Diode Laser production process to be more complex, at present can not be used for the manufacture of polarization maintaining Fiber Coupled Diode Laser melting cone technology for in-depth theoretical study.
However, due to the low cost and high performance of the polarization maintaining Fiber Coupled Diode Laser in the military and civilian areas has been more and more widely used, and the performance requirements of the coupler is also increasing, so the need for polarization-maintaining fiber coupling The development process of the coupler is deeply analyzed and studied, and the high performance polarization maintaining Fiber Coupled Diode Laser is developed, which has great practical significance for the future application and development of the coupler.