| DC 欄位 |
值 |
語言 |
| DC.contributor | 物理學系 | zh_TW |
| DC.creator | 陳亭儒 | zh_TW |
| DC.creator | CHEN, TING-JU | en_US |
| dc.date.accessioned | 2017-7-21T07:39:07Z | |
| dc.date.available | 2017-7-21T07:39:07Z | |
| dc.date.issued | 2017 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=102222007 | |
| dc.contributor.department | 物理學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 我們建立了一套885 nm穩頻雷射系統，藉由電光調製器將一外腔式半導體雷射頻率鎖在銫原子6S1/2-6D3/2的交叉譜線躍遷上，穩定度在200秒平均時間為10-12 (受限於銫原子鐘的穩定度)。我們使用偏頻鎖頻技術控制另外一台外腔式半導體雷射，透過Doppler free雙光子躍遷光譜測量銫原子6S1/2-6D3/2的躍遷頻率。經過對light shift以及磁場的修正，推得超精細常數為A=16.3351(8) MHz B=-0.092(9) MHz C=0.0029(4) MHz。除此之外，考慮了殘餘氣體對銫原子能階可能的影響，我們在真空系統中量測銫原子6S1/2-6D3/2¬躍遷的絕對頻率，其值分別為6S1/2 F=4 - 6D3/2 F=5: 338 595 897 162 (51) kHz 以及6S1/2 F=3 - 6D3/2 F=5: 338 600 493 491 (15) kHz | zh_TW |
| dc.description.abstract | We developed an 885-nm frequency stabilized laser system locked via Cesium 6S1/2-6D3/2 crossover-line transition with electro-optical modulator. The stability of laser frequency is 10-12 at 200-seconds average time. We offset locked a slave laser to probe the hyperfine structure of Cesium 6D3/2 via the Doppler free two-photon transition spectra. After extrapolating the light shift and the Zeeman shift, the Cesium 6D3/2 coupling constants A and B and C are determined as A=16.3351(8) MHz; B=-0.092(9) MHz; C=0.0029(4) MHz, which is the first time to our knowledge pushing the spectral resolution to C constant in this transition.
Besides, to avoid any collision shift by alien gas, we performed the absolute frequency measurement of 6S1/26D3/2 transition with a cesium cell whose vacuum was always kept at 10-10 by an ion pump. We obtained the value of 338 595 897 162 (51) kHz for 6S1/2 F=4 - 6D3/2 F=5 and 338 600 493 491 (15) kHz for 6S1/2 F=3 - 6D3/2 F=5 respectively. | en_US |
| DC.subject | 銫原子 | zh_TW |
| DC.subject | 6S-6D | zh_TW |
| DC.subject | 超精細結構 | zh_TW |
| DC.subject | 雙光子躍遷 | zh_TW |
| DC.subject | Cesium | en_US |
| DC.subject | 6S-6D | en_US |
| DC.subject | hyperfine structure | en_US |
| DC.subject | two-photon transition | en_US |
| DC.title | 銫原子6S1/2-6D3/2超精細躍遷絕對頻率與超精細結構 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Cesium 6S1/2-6D3/2 hyperfine transitions : absolute frequency and hyperfine structure | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |