研究目的
To explore the basics of gas lasers and teach about the most important types, including their operational principles, construction, and applications.
研究成果
Gas lasers vary widely in their characteristics, from low-power continuous beams to high-power pulsed outputs. Despite the decline in sales for many types, CO2 and excimer lasers remain important commercially due to their unique wavelengths and applications in medicine and industry. The chapter provides a comprehensive overview of gas laser physics, construction, and applications, highlighting their diversity and the principles that underlie their operation.
研究不足
The chapter notes that sales of most types of gas lasers have declined as semiconductor and solid-state lasers have replaced them for many applications. It also mentions the technical challenges associated with high-power gas lasers, such as the need for active cooling and the handling of hazardous gases in excimer lasers.
1：Experimental Design and Method Selection:
The chapter discusses the general design of gas lasers, including the use of gas tubes, mirrors, and electric discharges to produce a population inversion. It covers various excitation methods and the types of transitions (electronic, vibrational, rotational) that different gases undergo.
2：Sample Selection and Data Sources:
The text mentions the use of various gases (e.g., helium-neon, argon, krypton, CO2) and their mixtures in laser tubes, highlighting the importance of gas pressure and composition.
3：List of Experimental Equipment and Materials:
Describes the components of gas lasers, including tubes, mirrors (Brewster windows, confocal resonators), electrodes, and power supplies. It also mentions the need for cooling systems in high-power lasers.
4：Experimental Procedures and Operational Workflow:
Details the process of exciting the gas (longitudinal or transverse discharge), maintaining the population inversion, and extracting the laser beam. It also covers the operational differences between continuous-wave and pulsed lasers.
5：Data Analysis Methods:
Briefly touches on the spectral characteristics of gas lasers, including Doppler broadening and the selection of specific wavelengths through cavity optics.
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