完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | 萬冀威 | en_US |
dc.contributor.author | Ji-Wei Wan | en_US |
dc.contributor.author | 趙如蘋 | en_US |
dc.contributor.author | Ru-Pin Chao Pan | en_US |
dc.date.accessioned | 2014-12-12T02:20:53Z | - |
dc.date.available | 2014-12-12T02:20:53Z | - |
dc.date.issued | 1998 | en_US |
dc.identifier.uri | http://140.113.39.130/cdrfb3/record/nctu/#NT870429015 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/64436 | - |
dc.description.abstract | 實驗中使用不同介電異向差(Δε>0及Δε<0)的低折射係數液晶,作為研磨式光纖耦合器的夾層。對不同的液晶材料,分別採用平行排列和垂直排列二種方式。以632.8nm雷射為光源,藉由外加電壓改變液晶的有效折射係數,來控制耦合比例。 我們成功的做出比以前薄的液晶夾層,在不同的外加電壓下,比較不同液晶層厚度對於耦合率及耦合器開關時間的影響。實驗結果顯示液晶夾層較薄的耦合器比過去較厚的耦合率大且開關時間短。 | zh_TW |
dc.description.abstract | We use 632.8nm He-Ne Laser as light source and low-refractive index liquid crystals with positive and negative dielectric anisotropy(Δε>0 andΔε<0), respectively, as intermediate layer of the optical fiber coupler. By applying voltage, we can change the effective refractive index of the liquid crystal to tune the light coupling ratio. We successfully reduce the thickness of the liquid crystal intermediate layer by using thinner mylar spacer. We measure the coupled and uncoupled fiber output power when varying the applied voltage under different layer thickness. We also study the response time of our fiber couplers. The results show that both coupling ratio and response time performance are better for couplers with thinner liquid crystal layer. | en_US |
dc.language.iso | zh_TW | en_US |
dc.subject | 向列型液晶 | zh_TW |
dc.subject | 光纖耦合器 | zh_TW |
dc.subject | 開關時間 | zh_TW |
dc.subject | 電控式光纖耦合器 | zh_TW |
dc.subject | nematic liquid crystal | en_US |
dc.subject | optical fiber coupler | en_US |
dc.subject | switching time | en_US |
dc.subject | voltage-controlled fiber coupler | en_US |
dc.title | 以液晶為夾層之光纖耦合器中液晶層厚度對開關時間的影響 | zh_TW |
dc.title | The optical fiber coupler using liquid crystal layer and its effect on switching time | en_US |
dc.type | Thesis | en_US |
dc.contributor.department | 電子物理系所 | zh_TW |
顯示於類別: | 畢業論文 |