| Project/Area Number |
22760254
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
GOKA Shigeyoshi 首都大学東京, 理工学研究科, 准教授 (80305416)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 超小型原子発振器 / CPT共鳴 / ラムゼイ共鳴 / マイクロ波発振器 |
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| Research Abstract |
A pulse excitation method of coherent population trapping (CPT) with a liquid crystal optical modulator (LCM) and a higher-order harmonic excitation method combined with a pulse excitation were proposed for chip-scale atomic clocks (CSACs). Since liquid crystals enable reductions in size, weight, cost, and power consumption compared with acousto-optical modulators (AOMs), our methods are suitable for CSACs. Experiments showed that pulse excitation with a LCM can narrow the CPT resonance linewidth and reduce the light shift effect. The CPT resonance linewidth and light shift sensitivity were less than one-eighth and one-third those for continuous excitation, respectively.
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