銫原子6S-6D光譜有助於理論物理學家對銫原子波函數更精密的建立，使得B-Spline法所建立的波函數更趨於真實情況。這對於原子宇秤不守恆的計算至為重要。在應用方面，雙光子躍遷誘發透明的觀察有助於建立二級時間標準。比起傳統的CPT Clock具有，無光強增寬與光強頻移的好處。本計畫將建立885-nm銫原子穩頻系統與超冷銫原子系統，來觀察二個不同躍遷路徑之雙光子吸收之量子干涉，即，6D1/2, F=36D3/2, F=5 and 6D1/2, F=46D3/2, F=5。 ;Cesium atom 6S-6D spectrum is significant for setting up suitable sets of bases for constructing wavefunction via B-Spline. Two-photon transition induced transparency with 6D1/26D3/2 transitions benefits, comparing with that performed by one-photon transition, for free AC stark shift and free power broadening, which is very promising for building up a novel secondary time standard.This project proposes to build up an 855-nm cesium-stabilized diode laser and a cesium MOT system to observe the quantum interference between two pathways of cesium two-photon transition, namely, 6D1/2, F=36D3/2, F=5 and 6D1/2, F=46D3/2, F=5.
