Full metadata record
DC FieldValueLanguage
dc.contributor.author萬冀威en_US
dc.contributor.authorJi-Wei Wanen_US
dc.contributor.author趙如蘋en_US
dc.contributor.authorRu-Pin Chao Panen_US
dc.date.accessioned2014-12-12T02:20:53Z-
dc.date.available2014-12-12T02:20:53Z-
dc.date.issued1998en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#NT870429015en_US
dc.identifier.urihttp://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.abstractWe 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.isozh_TWen_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.subjectnematic liquid crystalen_US
dc.subjectoptical fiber coupleren_US
dc.subjectswitching timeen_US
dc.subjectvoltage-controlled fiber coupleren_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.titleThe optical fiber coupler using liquid crystal layer and its effect on switching timeen_US
dc.typeThesisen_US
dc.contributor.department電子物理系所zh_TW
Appears in Collections:Thesis