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Improvement of the signal-to-noise ratio in a glass-based guided-wave optical microphone
http://hdl.handle.net/10191/31209
http://hdl.handle.net/10191/31209c7effe29-1e6c-4952-b4a4-73d012dc16b5
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
6475_647519.pdf (811.3 kB)
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| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-12-24 | |||||
| タイトル | ||||||
| タイトル | Improvement of the signal-to-noise ratio in a glass-based guided-wave optical microphone | |||||
| タイトル | ||||||
| タイトル | Improvement of the signal-to-noise ratio in a glass-based guided-wave optical microphone | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | optical microphone | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | guided-wave optics | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | glass | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | diaphragm | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | elasto-optic effect | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
| 資源タイプ | conference paper | |||||
| 著者 |
Nikkuni, Hiroyuki
× Nikkuni, Hiroyuki× Mogi, Yoshiaki× Hayashi, Manabu× Ohkawa, Masashi× Sekine, Seishi× Sato, Takashi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In this study, the signal-to-noise ratio of a glass-based guided-wave optical microphone was successfully improved by both increasing sensitivity and reducing noise. The optical microphone has a square diaphragm as a pressure-sensitive structure and a straight single-mode waveguide across the diaphragm. Sensitivity of the microphone and resonance frequency of the diaphragm are dependent on the area and thickness of the diaphragm. In this study, in order to increase sensitivity, the diaphragm dimensions were enlarged from 16 mmx16 mmx0.15 mm in the previous study to 20 mmx20 mmx0.15 mm. According to theoretical calculations, the phase sensitivity and resonance frequency were 2.5 mrad/Pa and 3.4 kHz for a 20 mmx20 mmx0.15 mm diaphragm, respectively. The sensitivity was theoretically expected to be twice as high as that in the previous study. To reduce noise, a bandpass filter with passband from 300 Hz to 3 kHz was employed. After fabrication of the optical microphone, sound pressure, ranging from 100 to 122 dB-SPL, was applied to the microphone with a frequency of 1 kHz. The measured output of the optical microphone was almost proportional to the sound pressure, and the minimum detectable sound pressure level of the microphone was experimentally evaluated to be 100 dB-SPL. | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | Integrated optics: devices, materials, and technologies 11 : 22-24 January 2007 : San Jose, California, USA. : Jan 2007, San Jose, CA | |||||
| 書誌情報 |
Proceedings of SPIE - the International Society for Optical Engineering en : Proceedings of SPIE - the International Society for Optical Engineering 巻 6475, p. 647519-1-647519-8, 発行日 2007-02 |
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| 出版者 | ||||||
| 出版者 | International Society for Optical Engineering, SPIE | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0277786X | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA10619755 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1117/12.698904 | |||||
| 権利 | ||||||
| 権利情報 | Copyright 2007 Society of Photo-Optical Instrumentation Engineers | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
