서지주요정보
광분해 옥소레이저 증폭기 계열의 출력 특성 = The characteristic output of a photodissociation iodine laser amplifier series
서명 / 저자 광분해 옥소레이저 증폭기 계열의 출력 특성 = The characteristic output of a photodissociation iodine laser amplifier series / 한재원.
저자명 한재원 ; Hahn, Jae-Won
발행사항 [서울 : 한국과학기술원, 1983].
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소장정보

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4102018

소장위치/청구기호

학술문화관(문화관) 보존서고

MAP 8327

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초록정보

A photodissociation iodine laser amplifier series is developed and the characteristic output is examined. The amplifier series consists of an oscillator, a pre-amplifier, and a main-amplifier. In the pumping reflectors of the oscillator and the preamplifier, two parallel flash lamps placed at the foci of a double ellipse are used. The main- amplifier consists of two sections and in a section four flash lamps system is employed, each flash lamp being placed at the foci of the four-fold ellipse cavity. As the active medium of the laser,$i-C_3F_7I$ is used and the argon gas as the buffer gas in the amplifier. In order to run the amplifier series effectively, the beam quality of the oscillator and the pre-amplifier are examined in detail. The beam divergence is found to be 4.0 mradian, which is closely in the theoretical value, 3.5 mradian. The effect of the shockwave produced during optical pumping is examined. This effect is, however, avoided by giving 3-4μsec delay time between the amplifier pumping and the oscillator pumping. When that delay time is introduced, the output pulse is found to produce accurate Fresnel diffraction pattern. To examine the characteristic output of the amplifier series, the laser oscillator is made to oscillate with $TEM_{\circ\circ}$-mode, and the output pulse is fed to the preamplifier and then the main-amplifier. The gas pressure of the active medium ($i-C_3F_7FI$) of the oscillator and the pre-amplifier are both fixed to 100 torr and that constant pressure the main-amplifier output energy is measured and its dependence on the fill gas pressure is measured. And it is found that the maximal output energy from the main amplifier is 3.5J, when the pressure of $i-C_3F_7I$ is 40 torr. Therefore the energy gain $G_E$ of the pre-amplifier and the main amplifier are 11.5, and 13.0, respectively. In this case the electrical efficiency is worked out to be as high as 0.16%. The research on the power output depending on the partial pressure of argon gas, the buffer gas, is made, but the dependence is found not significant. The pulse forms of the oscillator output and the main-amplifier output are found to be 150 nsec, and 80 nsec, respectively. This measurement proves that pulse is sharpened in the amplifiers. The maximum power output of the entire system is thus determined to be 45 MW.

서지기타정보

서지기타정보
청구기호 {MAP 8327
형태사항 iv, 83 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jae-Won Hahn
지도교수의 한글표기 : 이상수
지도교수의 영문표기 : Sang-Soo Lee
학위논문 학위논문(석사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 75-81
주제 Optical amplifiers.
Iodine lasers.
광 분해 (Photolysis / disintegration) --과학기술용어시소러스
요오드. --과학기술용어시소러스
레이저. --과학기술용어시소러스
증폭기. --과학기술용어시소러스
레이저 출력. --과학기술용어시소러스
Photodissociation.
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