2003 Fiscal Year Final Research Report Summary
Wideband Optical Comb Generator Using Quasi-Velocity-Matched Modulation
| Project/Area Number |
14550043
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
MORIMOTO Akihiro Ritsumeikan Univ., Fac Science and Engineering, Professor, 理工学部, 教授 (00142307)
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| Project Period (FY) |
2002 – 2003
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| Keywords | modulator / Fabry-Perot / quasi-velocity-matching / domain inversion / ferroelectricity / ultrafast / optical comb generation / electoro-optic |
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| Research Abstract |
Domain inversion of an electrooptic crystal makes ultrafast optical spatial modulation possible. We have developed ultrafas*t electrooptic modulators, which separate and control optical frequencies with domain inversion, such as an electrooptic deflector, a wave-front controller, an aberration corrector, a phase grating and their integrated devices.
A wideband optical comb generator such as a Fabry-Perot modulator is useful for a optical frequency source on DWDM QptiCal communication and/or precise 9ptical spectroscopy. Domain inversion will improve the characteristics of a Fabry-Perot modulator.
Fabry-Perot modulators with periodic domain inversion are studied theoretically and are fabricated by using. domain inversion of an LiTaO3 electro-optic crystal. It is important to set the conditions between periodic inversion and an optical cavity in order, to increase the modulation. A quasi-velocity-matched FP modulator as an optical comb generator is fabricated by domain inversion with applying high voltage pulses. Microwave modulation characteristics are tested with external optical cavity mirrors.
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