Infrared single photon frequency up-conversion detection system based on full polarization-maintaining synchronous pulse pumping

Abstract

The invention relates to an infrared single photon frequency up-conversion detection system based on full polarization-maintaining synchronous pulse pumping. The system adopts a master-slave laser with an full polarization-maintaining structure, benefiting from the stable polarization state of a polarization-maintaining optical fiber, the master-slave laser has stable polarization-maintaining output, the anti-environmental interference capability is strong, and the long-time stable operation can be achieved; the laser adopts a master-slave structure, and the mutual crosstalk between two lasersis reduced by utilizing an injection type all-optical synchronization mode; and the slave laser is a full polarization-maintaining synchronous mode-locking mechanism based on a nonlinear loop mirror,and can achieve long-term stable synchronous mode-locking ultra-fast pulse output without optimizing the polarization state of injected light and the polarization evolution in the cavity of the laser; a grating pair is adopted in the cavity of the laser to control the dispersion amount in the cavity, and the synchronous pulse is precisely controlled in a time-frequency domain so as to obtain high-efficiency single-photon frequency up-conversion.

Description

technical field [0001] The invention relates to ultra-sensitive infrared detection technology, in particular to a single-photon infrared frequency up-conversion detection system based on full deviation-maintaining synchronous pulse pumping. Background technique [0002] In recent years, infrared single-photon detection has played an important role in many practical applications such as optical communication, lidar, laser ranging, laser guidance, quantum informatics, material detection and analysis, etc. The particularity of national defense technology. At present, infrared single-photon detectors have superior performance, but their high cost and harsh low-temperature working environment greatly limit the promotion and commercialization of their applications. Infrared detectors made of semiconductor materials, such as indium gallium arsenic avalanche photodiodes, can work stably at room temperature, and the cost is moderate, but their infrared detection efficiency is genera...

AI Technical Summary

Problems solved by technology

Active synchronization mainly uses electronic active feedback technology based on analog circuits. The control system of this method is complex and is easily affected by devices such as photodetectors, mixers, filters, and piezoelectric ceramic brakes.

The passive synchronization scheme is limited by the nonlinear polarization rotation (NPR) mode-locking mechanism, and the synchronous laser cavity is mainly composed of non-polarization-maintaining fibers and devices, which are susceptible to environmental disturbances

What's more, since the nonlinear frequency conversion is often sensitive to the polarization of the light field, the conversion efficiency cannot be stabilized for a long time, which seriously hinders its application in more practical occasions.

Images