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Spectroscopy of 3 S 1 state

Spectroscopy of 3 S 1 state. Lee, Sun Kyung 2009. 9. 21. Outline. 3 S 1 state 분광의 의미 1 S 0 - 3 P 1 - 3 S 1 ladder type 에 optical pumping 에 의한 Yb I triplet state 분광

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Spectroscopy of 3 S 1 state

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  1. Spectroscopy of 3S1 state Lee, Sun Kyung 2009. 9. 21

  2. Outline • 3S1 state 분광의 의미 • 1S0-3P1-3S1 ladder type 에 optical pumping에 의한 Yb I triplet state 분광 • 광격자 내 Yb 원자의 1S0-3P0 transition 분광에 가장 큰 영향을 미치는 Ac stark shift 계산에서 가장 sensitive parameter인 3P0-3S1 coupling 을 정의 • 1S0-3P0 transition 선폭 측정 시 normalization을 위한 repumping laser의 레이저 안정화 • 같은 setup으로 3P0-3D1 transition 분광과 레이저 안정화가 가능 • 같은 setup으로 넓은 선폭의 1S0-3P0 transition 분광 가능

  3. Coupling between triplet states

  4. Energy level • Ladder type atom ( 1S0-3P1-3S1) • Driving field : 556, 680 nm • Fluorescence : 650, 680, 770 nm (branching ratio 1: 3: 5) • Pumping atoms from 1S0 to 3P1 and from 3P1 to 3S1 • Interaction time in atomic beam • v=300m/s, ∆t~30μs, • 3S1 linewidth ~10MHz • I~14mW, Is~4mW/cm2, I/Is > 10 3S1 5 1 3 λ=770nm λ=680nm λ=650nm 3P2 3P1 3P0 λ=556nm 1S0

  5. Spectroscopy of 1S0-3P0 (578nm) may be done in another atomic beam setup

  6. Old Experimental setup 556nm Atomic Beam ECDL 770nm ECDL 680nm 680nm Iop=54mA Top=18.274(kΩ) TH10K ~13°C 770nm Iop=64mA Top=10.01(kΩ) TH10K ~25°C

  7. Experimental setup Lens λ/4 AOM Yb Atom λ/2 680nm ECDL

  8. 680 신호와 레이저 안정화 Before current modulation after current modulation

  9. Depletion of ground state population • 399 형광

  10. EOM effect (One carrier and Two side mode) in AOM double path setup Lee, Sun Kyung 2009. 9. 21

  11. 680 형광 신호

  12. 680 형광 신호 : 3 mode

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