Introduce the optical system for laser emission and reception
The laser emission and reception optical system consists of two major parts: the emission optical module and the reception optical module. Its most widely applied fields are laser processing systems, fluorescence detection systems and Raman spectroscopy detection systems.
1.The emission optical module is mainly responsible for collimating, expanding or shaping the laser beam emitted by the laser, so that it can be emitted with specific parameters such as beam quality, divergence Angle and energy distribution. The receiving optical module is used to collect the laser signal reflected back from the target, perform focusing, filtering and other operations on it, so as to facilitate subsequent detection and processing.
The laser emission system consists of key components such as the laser emission light source, collimating lens group, beam expander and shaping element. As the energy source of the entire system, the performance parameters of the laser emission light source, such as wavelength stability and power output characteristics, directly determine the effect of subsequent optical processing. The collimating lens group, through precise optical design, compresses the divergence Angle of the laser beam to an extremely small range, ensuring that the laser maintains a high energy concentration during long-distance transmission. The beam expander magnifies the diameter of the laser beam according to actual needs to meet the application requirements in different scenarios. The shaping element achieves flexible control of the laser beam shape by changing the phase distribution or amplitude distribution of the laser beam, such as converting a Gaussian beam into a flat-top beam, to meet the beam quality requirements in specific application scenarios.
2. The laser receiving system consists of core components such as the receiving lens group, filters, and photodetector. The receiving lens group is responsible for efficiently collecting the weak laser signals reflected back from the target and focusing them onto the surface of the photodetector through precise optical design to enhance the signal reception efficiency. Filters are used to filter out background noise and other interfering light signals, ensuring that only laser signals of specific wavelengths can reach the detector, thereby improving the signal-to-noise ratio and detection accuracy of the system. As the terminal component of the laser receiving system, the performance parameters of the photodetector, such as sensitivity and response time, directly determine the system’s detection ability and processing speed for laser signals.
Post time: Dec-29-2025