TW500934B - Optical switch utilizing Faraday rotator - Google Patents
Optical switch utilizing Faraday rotator Download PDFInfo
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- TW500934B TW500934B TW90128161A TW90128161A TW500934B TW 500934 B TW500934 B TW 500934B TW 90128161 A TW90128161 A TW 90128161A TW 90128161 A TW90128161 A TW 90128161A TW 500934 B TW500934 B TW 500934B
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500934500934
【發明領域】 【習知技術】 在光學系統中’許多情況下需要進行信號資料的隸 或^代,因此,光開關在光通訊系統中扮演了二個要 的角色。其中,光開關最主要的一個功能是 ^ 的光學路徑。 又夂得輸貝枓 於,光學開關,係為設置一可移動式的稜 鏡用以進仃切換光訊號之行進路線。如圖丨Α所 2對2光學開關4中,一第一接收端41所接收之一第'一光在吼一 號43傳輸至一第一輸出端45中;同時,一第二接收端u所 接收之一第二訊號44傳輸至一第二輸出端46中。如圖1β所 示,當一致動機構47提供動力將一稜鏡48移至一適當位置 時,一第一接收端41所接收之一第一光訊號43,通過棱鏡 48改變路線後,而傳輸至第二輸出端46中;而一第二接收 端42所接收之一第二訊號44通過稜鏡48改變路線後,而傳 ,,第一輸出端45中。其藉由移動稜鏡48的位置來改變光 讯旒之行進路線’即構成一 2對2光學開關4。 【發明概要】 承上所述,本發明之目的係提供一種運用法拉第轉子[Field of the Invention] [Knowledge Technology] In optical systems, many cases need to perform signal or data generation. Therefore, optical switches play two important roles in optical communication systems. Among them, the most important function of the optical switch is the optical path of ^. In addition, the optical switch is set to a movable prism to switch the route of the optical signal. As shown in Figure 2A, in the 2 to 2 optical switch 4, one of the first light received by a first receiving end 41 is transmitted to a first output end 45 in the roaring number 43; at the same time, a second receiving end u A received second signal 44 is transmitted to a second output terminal 46. As shown in FIG. 1β, when the moving mechanism 47 provides power to move a beam 48 to an appropriate position, a first optical signal 43 received by a first receiving end 41 is transmitted after changing the route through the prism 48 and then transmitted. To the second output terminal 46; and one of the second signals 44 received by a second receiving terminal 42 changes the route through 稜鏡 48, and is transmitted to the first output terminal 45. It changes the travel path of the optical signal by moving the position of 稜鏡 48, that is, a 2 to 2 optical switch 4 is formed. [Summary of the Invention] As mentioned above, the object of the present invention is to provide a Faraday rotator.
五、發明說明(2) ^ ^ ^關^係改變施加於法拉第轉子的磁場來改變偏振光 之說轉’進而控制光訊號之行進路線。 ㈣為^土述目的,本發明提供一種運用法拉第轉子之光 ★弟 刀光时一苐二分光器以及一法拉第轉 旅跄一黛,,一接收端接收一第一光訊號;第二接收端則 一分光器將第一光訊號分成-第-派弁盥二楚苐一光,以及將第二光訊號分為一第三偏 ^i人士、Γ偏振光。第二分光器則將第一偏振光與第二 亦二& i楚為第一光訊號,以及將第三偏振光與第四偏振 、,口 :第一光訊號。法拉第轉子係用於改變第一偏振 木知::振光、第二偏振光與第四偏振光之偏振方向, 轉子處於-第-旋轉角度時,第二分光器所合成 自第一輸出端輸出,第二光訊號則由第二 合成之第一光訊號係自第二輸出端輸出,第= 訊就則由第一輸出端輸出。 依本發明之一實施態樣,第一分光器與第二分光器可 =用極化分波器(PBS,Polarized Beam SpHtter)。第 2振光與第三偏振光為p偏振光’第二偏振光與第四偏 f光則為S偏振光。當法拉第轉子處於第二旋轉角度時, ^,夠改變光的偏振方向,使s偏振光轉為p偏振 振光轉為S偏振光。 與習知技術相比,本發明提供一種運用法拉第轉子之 光開關,尸、需改變施加於法拉第轉子之磁場,即可改變其V. Description of the invention (2) ^ ^ ^ The relationship ^ is to change the magnetic field applied to the Faraday rotator to change the polarization of the polarized light, and then control the course of the optical signal. For the purposes of the present invention, the present invention provides a light using a Faraday rotator. A dichroic beam splitter and a Faraday rotator and a daisy, a receiving end receives a first optical signal; a second receiving end Then, a beam splitter divides the first light signal into a first light, a second light signal, and a second light signal into a third polarized light and a polarized light. The second beam splitter sets the first polarized light and the second polarized light as the first optical signal, and the third polarized light and the fourth polarized light, and the first optical signal. The Faraday rotator is used to change the polarization direction of the first polarizer: vibrating light, second polarized light, and fourth polarized light. When the rotor is at the -first-rotation angle, the second beam splitter is synthesized from the first output end. The second optical signal is output from the second output terminal by the second synthesized first optical signal, and the third signal is output from the first output terminal. According to an embodiment of the present invention, the first beam splitter and the second beam splitter may use a polarized beam splitter (PBS, Polarized Beam SpHtter). The second and third polarized lights are p-polarized light 'and the second and fourth polarized f lights are S-polarized light. When the Faraday rotator is at the second rotation angle, ^ is enough to change the polarization direction of the light, so that the s-polarized light is converted into p-polarized light and the S-polarized light. Compared with the conventional technology, the present invention provides an optical switch using a Faraday rotator. If the magnetic field applied to the Faraday rotator is changed, it can be changed.
第6頁 五、發明說明(3) 而不需移 位移向 對偏振光之旋轉,用以 ,法拉第轉子之位置, 里,可減少法拉第轉子 改變光訊號之行進路線, 亦無需考慮法拉第轉子# 在移動時所產生之公差。 【較佳實施例之詳細說明】 -種相關圖式,說明依據本發明較佳 參照符號表示。 先開關’其中相同的元件 睛參照圖2A與圖2B,依本發明較佳實施例之 =含一第一接收端22、一第二接收端23、一第一 d、一第二輸出端25、一第一分光器u、一第二 =t 一法拉第轉子15。丨中,第—接收端22接收 _〇 (實線部份);第二接收端23接收一第二 C虛線部份)。 第一分光器11將第一光訊號20分成一第_偏 第二偏振光,以及將第二光訊號21分為一第三偏 第四偏振光。第二分光器則將第一偏振光與第二 成為第一光訊號20,以及將第三偏振光與第四偏 為第二光訊號21。法拉第轉子1 5係用於改變第一 第二偏振光、第三偏振光與第四偏振光之偏振方 §法拉苐轉子15處於一第一旋轉角度,即角 ¥ ’第二分光器1 2所合成之第一光訊號2 〇係自第 24輸出,第二光訊號21則由第二輸出端25輸出。 轉子15處於一第二旋轉角度,即角度為90度時, 貫施例的 以相同的 光開關1 輸出端 分光器1 2 一第一光 光訊號21 振光與一 振光與一 偏振光合 振光合成 偏振光、 向。 度為0度 一輸出端 當法拉第 第二分光 500934 五、發明說明(4) 器12所合成之第一光訊號2〇係自第二輸出端25輸出,第二 光訊號21則由第一輸出端24輸出。第一分光器11與第二分 光器12分別為第一極化分波器26 (Polarizing BeamFifth, the description of the invention (3) The rotation of the polarized light is not required to move, so that the position of the Faraday rotator can reduce the distance of the Faraday rotator to change the light signal, and it is not necessary to consider the Faraday rotator # The tolerance that occurs when moving. [Detailed description of the preferred embodiment]-A related drawing, which is illustrated with reference symbols, according to the present invention. Switching first 'refers to FIG. 2A and FIG. 2B for the same components. According to the preferred embodiment of the present invention, it includes a first receiving end 22, a second receiving end 23, a first d, and a second output end 25. , A first beam splitter u, a second = t a Faraday rotator 15. In 丨, the first-receiving end 22 receives _〇 (solid line part); the second receiving end 23 receives a second C dotted line part). The first optical splitter 11 divides the first optical signal 20 into a first-polarized second polarized light, and the second optical signal 21 into a third-polarized fourth-polarized light. The second beam splitter converts the first polarized light and the second into the first optical signal 20, and the third polarized light and the fourth into the second optical signal 21. The Faraday rotator 15 is used to change the polarization of the first, second, third, and fourth polarized lights. § The Faraday rotator 15 is at a first rotation angle, that is, the angle of the second beam splitter 12 The synthesized first optical signal 20 is output from the 24th, and the second optical signal 21 is output from the second output terminal 25. When the rotor 15 is at a second rotation angle, that is, when the angle is 90 degrees, the same optical switch 1 is used throughout the embodiment to split the beam splitter 1 2 a first light signal 21 vibrating light with a vibrating light and a polarized light Light is synthesized to polarized light. The degree is 0 degrees and the output end is the second Faraday beam splitter 500934. 5. Description of the invention (4) The first optical signal 20 synthesized by the device 12 is output from the second output terminal 25, and the second optical signal 21 is output by the first output. 24 output. The first beam splitter 11 and the second beam splitter 12 are respectively a first polarizing beam splitter 26 (Polarizing Beam
Splitter,PBS)與第二極化分波器27。 本實施例中更包含一第一反射單元13、一第二反射單 元14、一第一準直器16、一第二準直器I?、一第三準直器 18以及一第四準直器19。其中,第一反射單元13與第二反 射單元14分別為一第一反射鏡面28與一第二反射鏡面29 ; 另外’該等準直器係將發散之光訊號轉成平行之光訊號。 如圖2A所示,第一光訊號2〇由第一接收端22進入第一 極化分波器2 6中,第一光訊號2 〇被第一極化分波器2 6分離 成第一偏振光與第二偏振光,其中第一偏振光(p偏振 光’ P-polarization )直接通過第一極化分波器26,而第 一偏振光(s偏振光;s_polarizati〇n)被反射至 反 射鏡面29。 在圖2A中,法拉第轉子15其旋轉角度為第一旋轉角度 么1 :第一偏振光以及第二偏振光在通過法拉第轉 =反ίπ改變偏振方向,卜偏振光經由第-反射 由第—反射於一極化分波器27中,同時第二偏振光亦經 振射而到達第二極化分波器27。第-偏 ΪίΐΐΪΐί二極化分波器27至第-輸出端24,*第二 20,、由第一於端24 ’兩道光束合成第-光訊號 田弟輸出端24輸出。 第一先訊號21由第二接收端23進入第一極化分波器26Splitter, PBS) and a second polarizing demultiplexer 27. This embodiment further includes a first reflection unit 13, a second reflection unit 14, a first collimator 16, a second collimator I ?, a third collimator 18, and a fourth collimator.器 19。 19. Among them, the first reflecting unit 13 and the second reflecting unit 14 are a first reflecting mirror surface 28 and a second reflecting mirror surface 29 respectively; in addition, the collimators convert the divergent light signals into parallel light signals. As shown in FIG. 2A, the first optical signal 20 enters the first polarization splitter 26 from the first receiving end 22, and the first optical signal 20 is separated into the first polarization splitter 26 by the first polarization splitter 26. Polarized light and second polarized light, where the first polarized light (p-polarized light 'P-polarization) passes directly through the first polarized demultiplexer 26, and the first polarized light (s-polarized light; s_polarizati) is reflected to Mirror surface 29. In FIG. 2A, the rotation angle of the Faraday rotator 15 is the first rotation angle. 1: The first polarized light and the second polarized light change the polarization direction by Faraday rotation = inverse, and the polarized light is reflected by the first reflection through the first reflection. In a polarization demultiplexer 27, the second polarized light also reaches the second polarization demultiplexer 27 after being radiated. The first-biased polarized demultiplexer 27 to the first-output terminal 24, * second 20, and the first-optical signal synthesized by the two beams at the first-terminal 24 ′ are output to the output terminal 24 of Tiandi. The first pre-signal 21 enters the first polarization demultiplexer 26 from the second receiving end 23
$ 8頁 ^34 五、發明說明(5) " '^ ^ 5 ^ 一光訊號21被第一極化分波器2 6分離成一第三偏振 先與一第四偏振光,其中第三偏振光(P偏振光)直接通 鍾第一極化分波器2 6,經由第二反射鏡面2 9反射至法拉第 子二,而第四偏振光㈠偏振光)被反射至法拉第轉 第四偏振光經由第一反射鏡面28反射至第二極化分波 二27中,第三偏振光則經由第二反射鏡面29反射而到 27中。第三偏振光直接通過第二極化分波器 25 =5 ’而第四偏振光被反射至第二輸出端。 接ί,iii L二光訊號21,由第二輸出端25輸出。 月乡…、圖2β,第一光訊號20由第一接收端、* 入弟一極化分波器26中,第一光 接4而22進 26分離成第-偏振光與第二偏振光:— =波器$ 8 pages ^ 34 V. Description of the invention (5) " '^ ^ 5 ^ A light signal 21 is separated into a third polarization first and a fourth polarization by the first polarization demultiplexer 26. Among them, the third polarization The light (P-polarized light) passes directly through the first polarization demultiplexer 26, and is reflected to the Faraday second by the second reflecting mirror surface 29, and the fourth polarized light (the polarized light) is reflected to the Faraday-turned fourth polarized light. It is reflected into the second polarization sub-wavelength 27 through the first reflecting mirror surface 28, and the third polarized light is reflected into the 27 through the second reflecting mirror surface 29. The third polarized light passes directly through the second polarized demultiplexer 25 = 5 'and the fourth polarized light is reflected to the second output end. Then, iii L two optical signals 21 are output from the second output terminal 25. Yuexiang ..., Fig. 2β, the first optical signal 20 enters the first polarizing demultiplexer 26 from the first receiving end, and the first light is connected to 4 and 22 to 26 are separated into first-polarized light and second-polarized light. : — = Waver
偏振光)被反射至第二反;匕=2。6,而第二偏振光(S 在圖2B中,法拉第轉子15之旋 (90度):故在通過法拉第轉子15,角ς為第二旋轉角度 振光)轉變成S偏振光,而第二偏振· 一偏振光(Ρ偏 p偏振光。第-偏振振ϋ偏振光)轉變成 鏡面_”二極化分波器m光)經由第一反射 一極化为波斋27。其中第二偏振:偏振光則到達第 直接通過第二極化分波器2 :二變成P偏振光) 光(已轉變成S偏振光)反-輪出:25,❿第一偏振 合成第一光訊號20,第一弟;;輪出端25,兩道光束The polarized light) is reflected to the second reflection; D = 2. 6, and the second polarized light (S in Figure 2B, the rotation of the Faraday rotator 15 (90 degrees): Therefore, when passing through the Faraday rotator 15, the angle is second The rotation angle vibration light) is converted into S-polarized light, and the second polarization · first polarization light (P-polarized p-polarized light. The first-polarized ϋ polarization light) is converted into a mirror surface— "two-polarized demultiplexer m light) via the first One reflection and one polarization is Bozhai 27. Among them, the second polarization: the polarized light reaches the first and passes directly through the second polarization splitter 2: the second becomes P-polarized light) The light (converted into S-polarized light) is reverse-rounded out: 25, ❿ the first polarization to synthesize the first light signal 20, the first brother ;; the exit end 25, two beams
田弟一輸出端25輸出。 ITian Di output 25 output. I
JUU934 五、發明說明(6) 第二光訊號21由第二接收端23進入第一極化分波器26 邀,第二光訊號21被第一極化分波器26分離成第三偏振光 二第四偏振光,其中第三偏振光(p偏振光)直接通過第 1極化为波器2 6 ’經由第二反射鏡面2 9反射至法拉第轉子 中’而第四偏振光(s偏振光)被反射至法拉第轉子15 ,法拉第轉子1 5將第三偏振光轉為s偏振光,而第四偏 /光轉為P偏振光。接著,第四偏振光(已轉變成p偏振光 經由第一反射鏡面28反射至第二極化分波器27中,同時 弟三偏振光(已轉變成S偏振光)亦到達第二極化分波器、 27中。其中第四偏振光直接通過第二極化分波器π至第一 $出端24 ’而第三偏振光反射至第一輸出端24,兩道光束 合成第二光訊號21,由第一輸出端24輸出。 请參照圖3 Α及3 Β,在本發明之第二實施例中,第一分 光器11與第二分光器1 2係為梯形形狀之一第一極化分波器 3 〇與一弟二極化分波器31,而第一實施例中之第一反射鏡 面28與第二反射鏡面29分別用一第一反射層32與一第二反 射層3 3替代,本實施例中其餘之元件及特徵皆與第一實施 例相同。第一反射層32及第二反射層33係分別設置於第一 極化分波器30之一表面36及第二極化分波器31之一表面37 上’其表面36及表面37分別與一極化過爐膜(p〇iarize(j filter ) 38及一極化過濾膜39相互平行。第一反射層32及 第二反射層33之功能與第一實施例中的第一反射鏡面28及 第二反射鏡面29相同,第一反射層32改變第二偏振光及第 三偏振光之行進路線,而第二反射層3 3改變第一偏振光與JUU934 V. Description of the invention (6) The second optical signal 21 is invited by the second receiving end 23 into the first polarized demultiplexer 26, and the second optical signal 21 is separated into the third polarized light by the first polarized demultiplexer 26 The fourth polarized light, wherein the third polarized light (p-polarized light) passes through the first polarization directly into the wave device 2 6 'reflected into the Faraday rotator through the second reflecting mirror surface 29 and the fourth polarized light (s-polarized light) Reflected to the Faraday rotator 15, the Faraday rotator 15 converts the third polarized light into s-polarized light, and the fourth polarized light into P-polarized light. Then, the fourth polarized light (which has been converted into p-polarized light is reflected by the first reflecting mirror surface 28 to the second polarized demultiplexer 27, and the third polarized light (which has been converted into S-polarized light) also reaches the second polarization. Demultiplexer, 27. Among them, the fourth polarized light directly passes the second polarized demultiplexer π to the first $ out end 24 'and the third polarized light is reflected to the first output end 24, and the two beams are combined into the second light. The signal 21 is output by the first output terminal 24. Please refer to FIGS. 3A and 3B. In the second embodiment of the present invention, the first beam splitter 11 and the second beam splitter 12 are one of the trapezoidal shapes. The polarization demultiplexer 30 and the second polarization demultiplexer 31, and the first reflecting mirror surface 28 and the second reflecting mirror surface 29 in the first embodiment use a first reflection layer 32 and a second reflection layer, respectively. 3 3 Instead, the remaining components and features in this embodiment are the same as those in the first embodiment. The first reflective layer 32 and the second reflective layer 33 are respectively disposed on a surface 36 and a first surface of the first polarization demultiplexer 30. On one surface 37 of the two-polarization demultiplexer 31, its surface 36 and surface 37 are respectively connected to a polarization furnace film (p〇iarize (j filter) 38 and a polarization filter film 39 are parallel to each other. The functions of the first reflection layer 32 and the second reflection layer 33 are the same as those of the first reflection mirror surface 28 and the second reflection mirror surface 29 in the first embodiment, and the first reflection layer 32 is changed. The travel path of the second polarized light and the third polarized light, and the second reflective layer 33 changes the first polarized light and
第10頁 500934 五、發明說明(Ό 第四偏振光之行進路線。 再請參照圖4A及4B,在本發明的第三實施例中,第一 實施例中之第一極化分波器2 6及第二極化分波器2 7分別以 一第一極化層3 4及一第二極化層3 5替代,其餘之元件及特 徵皆與第二實施例相同。第一極化層34及第二極化層35之 功能與第一極化分波器2 6及第二極化分波器2 7相同,係將 光訊號分成P偏振光與S偏振光,以及將偏振光合成為光訊 號,該等極化層分別設置於具有高透光率的片狀基材之 上;又’第一反射層32與第二反射層33亦分別設置於具有 高透光率的片狀基材之上。在此,具有高透光率的片狀基 材可為一薄片,用以固定該等極化層與該等反射層。 本發明所提供的運用法拉第轉子之光開關係利用改變 施加於法拉第轉子15的磁場來進行光訊號行進路線之切 換。第-接收端22、第二接收端23、第一輸出端24 二 輸出端25以及法拉第轉子15皆為固定於一 : 發明所提供的運用法拉第轉子 ^ = 所以本 考慮該等端子以及法拉第轉子15之;^僅$於^造組裝時 換時考慮因移動而產生的公差。a ,而不需在進行切 用法拉第轉子之光開關無須考二m所提供的運 使接收端與輸出端之對正^ ,寺兀件么差的變化, 以上所述僅為舉例性且更為精準。 本發明之精神與範疇,而對盆:限制性者。任何未脫離 應包含於後附之申請專利範圍中了之等效修改或變更,均 500934 圖式簡單說明 【圖式之簡單說明】 圖1 A及1B為一示意圖,說明習知之2對2光學開關。 圖2A及2B為一示意圖,說明本發明第一實施例中運用 法拉第轉子之光開關。 圖3A及3B為一示意圖,說明本發明第二實施例中運用 法拉第轉子之光開關。 圖4A及4B為一示意圖,說明本發明第三實施例中運用 法拉第轉子之光開關。Page 10, 500934 V. Description of the invention (Ό Route of the fourth polarized light. Please refer to FIGS. 4A and 4B again. In the third embodiment of the present invention, the first polarization splitter 2 in the first embodiment 6 and the second polarization splitter 27 are replaced by a first polarization layer 34 and a second polarization layer 35, respectively, and the remaining components and features are the same as those of the second embodiment. The first polarization layer The functions of 34 and the second polarizing layer 35 are the same as those of the first polarizing demultiplexer 26 and the second polarizing demultiplexer 27. The optical signal is divided into P-polarized light and S-polarized light, and the polarized light is synthesized into Optical signals, the polarizing layers are respectively disposed on a sheet-like substrate having a high light transmittance; and the first reflective layer 32 and the second reflective layer 33 are also disposed on a sheet-like base having a high light transmittance Here, the sheet-like substrate with high light transmittance can be a thin sheet, which is used to fix the polarizing layers and the reflective layers. The light-open relationship using the Faraday rotator provided by the present invention can be changed. The magnetic field applied to the Faraday rotator 15 is used to switch the route of the optical signal. The first receiving end 22, the second receiving end 23, One output end 24, two output ends 25, and Faraday rotator 15 are all fixed to one: The application of the Faraday rotator provided by the invention ^ = Therefore, this terminal and the Faraday rotator 15 are considered; ^ Only $ ^ is considered when changing during assembly The tolerance due to movement. A, without the need to cut the optical switch of the Faraday rotator, there is no need to test the alignment between the receiving end and the output end. The description is only exemplary and more accurate. The spirit and scope of the present invention, but the basin: restrictive. Any equivalent modification or change that does not depart from the scope of the appended patent application is 500934. Brief description [Simplified description of the drawings] Figures 1A and 1B are schematic diagrams illustrating a conventional 2 to 2 optical switch. Figures 2A and 2B are schematic diagrams illustrating a light switch using a Faraday rotator in the first embodiment of the present invention. 3A and 3B are schematic diagrams illustrating an optical switch using a Faraday rotator in a second embodiment of the present invention. FIGS. 4A and 4B are schematic diagrams illustrating an optical switch using a Faraday rotator in a third embodiment of the present invention.
【圖式符號說明】 1 運用法拉第轉子之光開關 11 第一分光器 12 第二分光器 13 第一反射單元 14 第二反射單元 15 法拉第轉子 16 第一準直器 17 第二準直器 18 第三準直器 19 第四準直器 20 第一光訊號 21 第二光訊號 22 第一接收端 23 弟二接收端[Illustration of Symbols] 1 Use of Faraday Rotor Light Switch 11 First Beamsplitter 12 Second Beamsplitter 13 First Reflection Unit 14 Second Reflection Unit 15 Faraday Rotor 16 First Collimator 17 Second Collimator 18 Three collimators 19 Fourth collimator 20 First optical signal 21 Second optical signal 22 First receiving end 23 Second receiving end
第12頁 500934 圖式簡單說明 24 第一輸出端 25 第二輸出端 26 第一極化分波器 27 第二極化分波器 28 第一反射鏡面 29 第二反射鏡面 30 第一極化分波器 31 第二極化分波器 32 第一反射層 33 第二反射層 34 第一極化層 35 第二極化層 36 、37 表面 38 〜39 極化過濾膜 4 光學開關 41 第一接收端 42 苐二接收端 43 第一光訊號 44 第二訊號 45 第一輸出端 46 第二輸出端 47 致動機構 48 稜鏡Page 12 500934 Brief description of the diagram 24 First output end 25 Second output end 26 First polarizing demultiplexer 27 Second polarizing demultiplexer 28 First reflecting mirror surface 29 Second reflecting mirror surface 30 First polarizing branch Filter 31 second polarized splitter 32 first reflective layer 33 second reflective layer 34 first polarized layer 35 second polarized layers 36, 37 surfaces 38 to 39 polarized filter film 4 optical switch 41 first reception Terminal 42 苐 Receiving terminal 43 First light signal 44 Second signal 45 First output terminal 46 Second output terminal 47 Actuating mechanism 48 稜鏡
第13頁Page 13
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TW90128161A TW500934B (en) | 2001-11-13 | 2001-11-13 | Optical switch utilizing Faraday rotator |
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TW90128161A TW500934B (en) | 2001-11-13 | 2001-11-13 | Optical switch utilizing Faraday rotator |
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