서지주요정보
루비에서 발생하는 위상공액파의 이방성 연구 = Anisotopic properties of phase conjugate wave generated in ruby crystal
서명 / 저자 루비에서 발생하는 위상공액파의 이방성 연구 = Anisotopic properties of phase conjugate wave generated in ruby crystal / 이학규.
저자명 이학규 ; Lee, Hak-Kyu
발행사항 [대전 : 한국과학기술원, 1990].
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소장정보

등록번호

8000234

소장위치/청구기호

학술문화관(문화관) 보존서고

DAP 9014

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

This dissertation is concerned with optical phase conjugate waves generated in cryptocyanine and ruby crystal. The phase conjugate(PC) mirror system consisting of a and amplifier and a nonlinear medium is presented and the theoretical analysis of enhanced PC wave in the system is derived by taking into account of the overlap of the probe and counterpropagating PC wave in the amplifier. In order to examine experimentally the enhanced PC reflectivity in degenerate four wave mixing (DFWM) an amplifier is placed in the probe beam path. A Q-switched ruby laser is a light source, and a ruby rod of 6mm (diameter)×76mm (length) and cryptocyanine dissolved methanol are used for the amplifier and the nonlinear medium, respectively. Experimental result of maximal $R_{enh}/R$=3.9±0.25 is obtained where R and $R_{enh}$ are PC reflectivities in the absence and presence of the amplifier, respectively. The experimental results agree within 5% with the theoretical values. Next, the anisotropic properties of PC wave generated in a ruby crystal are investigated. The real part $n'_2$ of the complex nonlinear refractive index coefficients of ruby crystal $(Cr^{3+}:Al_2O_3)$ induced by $Ar^+$ ion laser (5145$\mathring{A}$), are measured by Mach-Zehender interferometric method. The $n'_2$ measured at same pumping beam wavelength for the light polarization perpendicular ($\sigma$) and parallel ($\pi$) to the crystal c-axis are (2.81±0.36)×$10^{-8} cm^2/W$ and (1.33±0.17)×$10^{-8} cm^2/W$, respectively. The measured values are useful for the DFWM experiments in ruby crystal. The isotropic DFWM theory can not be applied in the uniaxial crystal as ruby, since both of the ordinary (o) and extraordinary (e) gratings are formed by the o-waves and e-waves, respectively. An anisotropic DFWM theory is derived considering both the transmission and reflection gratings by the treatment of the o-waves and e-waves separately. The experiments are performed for two cases. In one the o-grating vector equals to e-grating vector, so that the o-and e-gratings have the same Bragg diffraction conditions but in the other otherwise. The experimental results agree within 5% with the theoretical values calculated by using the $n'_{2A\sigma}$ and $n'_{2A\pi}$ measured before.

서지기타정보

서지기타정보
청구기호 {DAP 9014
형태사항 [iv], 96 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Hak-Kyu Lee
지도교수의 한글표기 : 이상수
지도교수의 영문표기 : Sang-Soo Lee
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 90-96
주제 Optical phase conjugation.
Ruby crystals.
루비. --과학기술용어시소러스
위상 공역. --과학기술용어시소러스
이방성. --과학기술용어시소러스
Anisotropy.
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