Microprocessing and Microplasma Generation by Femtosecond Laser Pulses Generated by Figure-of-Eight Erbium-Doped Fiber-Laser Amplifier System
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概要
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A high-power femtosecond fiber-laser system for microplasma generation and microprocessing was developed. A 115 fs pulse train was generated by a passively mode-locked erbium-doped fiber laser. The pulses were near the Fourier transform limit. The pulse repetition rate was 12.2 MHz, the average power was 2.2 mW, and the peak power was 940 W. From the fiber-laser output, a small number of pulses were extracted using a lithium niobate optical modulator. The extracted pulses were amplified by an erbium-doped fiber amplifier with a small-signal gain of 400. The pulse was amplified with a net gain of 18 for a repetition rate of 1 MHz. The generation of microplasma from an amorphous carbon film was observed by irradiation of the output of the fiber laser system. The generation of the microplasma was continuous when the position of irradiation was scanned. The diameter of the microplasma was 14 μm. A microablation trace of 15 μm width was obtained on the film.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-08-30
著者
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Mizunami Toru
Department Of Electrical Engineering Faculty Of Engineering Kyushu Institute Of Technology
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Kizaki Naoya
Department of Electrical Engineering, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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Mizunami Toru
Department of Electrical Engineering, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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Nagaiwa Kenzo
Department of Electrical Engineering, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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- Microprocessing and Microplasma Generation by Femtosecond Laser Pulses Generated by Figure-of-Eight Erbium-Doped Fiber-Laser Amplifier System