Relation Between Discharge Length and Laser Pulse Characteristics in Longitudinally Excited CO2 Laser
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A longitudinally excited CO2 laser pumped by a fast discharge emits a short laser pulse, similarly to TEA and Q-switched CO2 lasers. We investigated the relation between the discharge length and the laser pulse characteristics to develop a longitudinally excited CO2 laser producing a high spike laser pulse. We examined discharge lengths of 30, 45, and 60 cm, using the same mirrors and the same excitation circuit with the same input energy. A longer discharge length increased the discharge volume and improved the laser output energy. However, the longer discharge length caused a long discharge formation time (a slow fall time of the discharge voltage) due to the higher discharge impedance, which resulted in a long laser pulse tail. Therefore, the longitudinally excited CO2 laser had optimum conditions for obtaining a high spike laser pulse effectively.
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- Relation Between Discharge Length and Laser Pulse Characteristics in Longitudinally Excited CO2 Laser
Journal of Infrared, Millimeter, and Terahertz Waves
Volume 34, Issue 3-4 , pp 225-230
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- Online ISSN
- Springer US
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- Longitudinal excitation
- CO2 laser
- Fast discharge
- Laser pulse shape
- Industry Sectors
- Author Affiliations
- 1. Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi, 400-8511, Japan
- 2. Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan