서지주요정보
다중 펌프광으로 구동된 원자계와 변조전달 분광학을 이용한 광주파수표준 연구 = Two-level atomic system driven by a polychromatic pump field and modulation transfer spectroscopy for optical frequency standards
서명 / 저자 다중 펌프광으로 구동된 원자계와 변조전달 분광학을 이용한 광주파수표준 연구 = Two-level atomic system driven by a polychromatic pump field and modulation transfer spectroscopy for optical frequency standards / 윤태현.
저자명 윤태현 ; Yoon, Tai-Hyun
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8010026

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 99005

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Theoretical investigations of the high resolution optical heterodyne spectroscopy with a phase-modulated pump field and experimental realization of an optical frequency standard at 532 nm by using a diode-pumped frequency-doubled Nd:YAG laser of which frequency is stabilized to the hyperfine component of the Iodine molecule are discussed. The 532 nm OFS is applied to measure the absolute spacing of the diffraction grating which can transfer the traceability of the standard of length down to the nanometer range. The theory of the modulation transfer spectroscopy employing a phase-modulated pump field is generalized to include the parametric interactions associated with an arbitrarily intense probe field. General solutions, and analytical solutions at some special cases, of the density matrix equations describing the interactions between a homogeneous two-level atomic system and the external driving field which consists of an equidistant trichromatic pump with frequency difference Ω and an arbitrarily intense probe field with frequency detuning δ from the average frequency of the pump field are obtained. In order to solve the optical Bloch equations a two dimensional harmonic expansion method in terms of two frequencies of Ω and δ is introduced. From the general solutions the polarization spectrum of the probe field induced in the atomic medium, which immediately gives the dimensionless probe absorption and dispersion spectrum, is obtained. The physical nature of the discrete polarization components at δ = -nΩ/(m+1), n ≠ 0, m ≠ -1, where n,m are integers, on the continuous polarization spectrum as well as the generalized Rabi resonances observed on the continuous probe absorption and dispersion spectrum are extensively discussed. The quasienergies and eigenstates of the two-level atom dressed by the trichromatic pump field are obtained and the observed structures of the generalized Rabi resonances are successfully explained on the basis of the obtained quasienergy level structure. Futhermore, the physical nature of the discrete elastic peaks on the continuous polarization spectrum has been explained using the theory of parametric four-wave interactions between the polychromatic pump field and the two-level atom. In addition, for the case of the bichromatic pump field the amplification of the probe field without population inversion at the line center is observed for the first time, which originates from the stimulated two-photon emission of the probe field through the heterodyne parametric four-wave interactions including the probe field. A modulation transfer spectrometer is constructed by using a diode-pumped frequency-doubled 532 nm Nd:YAG laser. The Doppler-free dispersion spectrum belonging to the R(58)32-0 rotational-vibrational transition of the hyperfine component of the $^{127}I_2$ molecule is measured by using the constructed modulation transfer spectrometer. The dispersion spectrum of the $α_1$ component of the R(58)32-0 transition line is used to stabilize the frequency of the 532 nm Nd:YAG laser for the optical frequency standard at 532 nm. We propose two methods to measure the absolute spacing of the diffraction grating, which can transfer the traceability of the standard of length down to the nanometer range. As a first application the constructed optical frequency standard at 532 nm is applied to measure the absolute spacing of the commercial plane grating in order to demonstrate the proposed one wavelength method.

서지기타정보

서지기타정보
청구기호 {DPH 99005
형태사항 iii, 120 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Tai-Hyun Yoon
지도교수의 한글표기 : 이해웅
지도교수의 영문표기 : Hai-Woong Lee
수록잡지명 : "Diffractometric methods for absolute measurement of diffraction grating spacings". Optics Letters. Optical Society of America, vol. 24, no. 2, pp. (1999)
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 참고문헌 : p. 116-120
주제 다중펌프광
2준위 원자
밀도반전없는 증폭
광주파수 표준
회절격자간격 절대측정
Polychromatic pump field
Two-level atom
Amplification without population inversion
Optical frequency standards
Absolute measurement of grating spacing
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