1234952 玖、發明說明： 【發明所屬之技術領域】 本發明是有關於一種光波導波長多工器，特別是指— 種光波導低密度波長多工器（coarse wavelength division multiplexer ;簡稱 CWDM)。 【先前技術】 在網際網路日益普及和高傳輸容量快速成長下，光纖 (optical fiber)通訊架構等傳輸方式，已開始進入時間 多工與波長多工相結合的波長多工通訊系統（Wavelength 10 Division Multiplexing ; WM)時代。 參閱圖1、圖2及圖3，一種習知z字形波長分割多 工器（zigzag wavelength division multiplexer)l，又 稱鋸齒形波長分割多工器。該Z字形波長分割多工器1包 含：一中間塊（intermediate block)ll、一 輸入端 12 及 15 複數輸出端13。 該中間塊11是一實心且透明的基板，並具有一第一 側邊111及一相反於該第一側邊U1的第二側邊112。 該輸入端12是設置在該中間塊11的第一側邊Η1 上，並具有一第一套管121，及一設置在該第一套管121 20 内的光學準直器（optical col 1 imator) 122。該第一套管 121之一中心軸線是與該第一側邊ιη以一角度介於75度 至90度之間的夾角㊀’利用熱固化樹脂（therm〇sett丨叫 resin)固著於該第一侧邊in上，並於内部設有一具有一 開口 124的固定物123。該光學準直器122是利用熱固化 1234952 樹脂固著於該固定物123上，並由一玻璃管、至少一設置 在該玻璃管内的折射率漸變透鏡（graclient index lens; 簡稱GRIN lens)、一與該折射率漸變透鏡相間隔設置在該 玻璃管内的玻璃套圈，及一設置在該玻璃套圈内傳輸光纖 5 所構成（圖未示）。 該等輸出端13分別相間隔地設置在該第一及第二側 邊111、112上。為便於描述說明此輸出端13的細部結構， 以下以參閱圖3說明之。每一輸出端13具有一第二套管 131、一光學準直器132及一濾波片（fiiter)133。 10 該第二套管13丨是藉由熱固性樹脂固著於該第二侧邊 112上，並具有一具有一開口 135的固定物134，且由該 固定物134界定出相間隔的一第一管狀部136及一第二管 狀部137。該第一管狀部136的一中心軸線l與該第二管 狀部13 7的一中心軸線L2夾一第二夹角㊀’，且該第二管狀 15 部137的一開口面與該中心軸線L2呈一垂直角度。 該光學準直器132設置於該第一管狀部136，並利用 熱固性樹脂固著於該固定物134上。該光學準直器132具 有一固著在該固定物134上的折射率漸變透鏡138、一墊 片139、一與該折射率漸變透鏡138相間隔設置的玻璃套 20 圈140及一設置在該玻璃套圈140内的傳輸光纖141。其 中，該墊片139藉熱固性樹脂將該折射率漸變透鏡ι38與 該玻璃套圈140相互固著。 該濾波片133設置在該第二管狀部ι37並藉熱固性樹 脂固著於該固定物134上。 1234952 其中，該輸入端12可傳輸一多波段（multi—channel) 之一次光光束（primary beam ;意即具有^、L、^的 光束），藉該等輸出端丨3内所設置的濾波片133使該一次 光光束呈一 ζ字形路徑依序傳遞至各輸出端13，並藉由該 5 等濾波片I33將該一次光光束分別過濾成複數特定頻率範 圍的單波段（single-channel)的二次光光束（sec〇ndaq beam;意即該等輸出端13分別僅具有該 單波段之二次光光束），以形成一分光作用。 由於此種Z字形波長分割多工器丨是藉由機械加工的 10 方式組裝而成，且在組裝過程中精準度較不易控制。因 此，當該一次光光束的一入射角產生偏差時，將造成該等 濾波片133在分別過濾形成該等二次光光束時的頻率改變 及偏振依賴損失（polarization dependent l〇sses;簡稱 PDL)等問題。另外，由於上面所提及的各光學準直器的折 15 射率漸變透鏡將依造光學設計的需求而增加，因此相形之 下也增加使用空間。 綜上所述，如何解決Z字形波長分割多工器在組裝過 私中造成光損耗並節省使用空間等問題，是當前開發z字 形波長分割多工器相關業者所需克服的一大難題。 20 【發明内容】 因此，本發明之目的，即在提供一種光波導低密度波 長多工器。 本發明之光波導低密度波長多工器，包含：一波導晶 片（wave-guide chipset)、一輸入單元、一第一傳輸裝置 1234952 及一第二傳輸裝置。 該波導晶片具有-第-側面’及一與該第一側面對立 設置的第二側面，且該波導晶片上形成有一光學迴路。較 佳地，該第一側面可平行於該第二側面。 5 該輸入單元設置於該波導晶片的第一側面上，且具有 一輸入接頭（glass ferru〗e)及一設置在該輸入接頭内'並 傳輸-多波段的-次光光束的輸入光纖。該輸入接頭之一 中心軸線是與該第一側面夾一第一央角。 該第一傳輸裝置與該輸入單元相間隔地設置在該第 10 一側面上，並呈現有一反射性。 該第二傳輸裝置具有複數相間隔地設置在該第二側 面上的傳輸單元。每一傳輸單元具有一傳輸接頭、一形成 在該傳輸接頭上的渡膜，及一設置在該傳輸接頭内的傳輪 光纖，且每一傳輸接頭的—中心軸線是與該第二側面夾— 15 第一夾角。1亥等遽膜分別對-對應的特定波長範圍的光呈 現有穿透性，且對其餘波長範圍呈現有—反射性。該— 次光光束藉該波導晶片、該第一及第二傳輸裝置的反射 I*生以一 Z字形路徑依序傳遞至該等傳輸裝置，並藉該第 -傳輸裝置的穿透性將該一次光光束過濾形成複數特定 20 ;皮長耗11的二次光光束’經由該等傳輸光纖分別輸出以形 成一分光作用。 本發明之功效在於，藉由利用半導體製程中的微影蝕 y ^photolithography)等方式製作而成的該波導晶片取 代習知所使用的折射率漸變透鏡，以節省多工器的使用空 1234952 間並提高光學路徑的精準度。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 、下配口參考圖式之兩個較佳實施例的詳細說明中，將可 清楚的明白。 在本發明被詳細描述之前，要注意的是，在以下的說 明中，類似的元件是以相同的編號來表示。 參閱圖4,本發明之光波導低密度波長多工器的一第 一較佳實施例，包含：一波導晶片2、一輸入單元3、一 第一傳輸裝置4及一第二傳輸裝置5。 3亥波導晶片2具有一第一側面21，及一與該第一侧面 21對立設置的第二側面22。該波導晶片2上形成有一利 用微影姓刻所製成的光學迴路（圖未示）。較佳地，該第一 侧面21可平行於該第二側面22。 該輸入單元3設置於該波導晶片2的第一側面21上， 且具有一輸入接頭31、一形成在該輸入接頭31上的抗反 射膜（anti-reflective coating;簡稱 AR coating)32 及 一設置在該輸入接頭31内並傳輸一多波段的一次光光束 (λ〇)的輸入光纖33。該輸入接頭31之一中心軸線是與該 第一側面21夾一第一夾角（α)。一般而言，該第一夾角範 圍大約介於82度至84度。 該第一傳輸裝置4與該輸入單元3設置在該第一側面 21上，且該第一傳輸裝置4是一呈現有一反射性的反射膜 41 〇 1234952 該第二傳輸裝置5具有複數相間隔地設置在該第二側 面22上的傳輸單元5〇。每一傳輸單元5〇具有一傳輸接頭 51、一形成在該傳輸接頭51上的濾膜52，及一設置在該 傳輪接頭51内的傳輸光纖53,且每一傳輸接頭51的一中 心軸線是與該第二側面22夾一第二夾角（β)。該等濾膜52 分別對一對應的特定波長範圍的光呈現有一穿透性，及對 其餘波長範圍呈現有一反射性。 該一次光光束（λ〇)藉該波導晶片2上的光學迴路g 圭jui、該第一及第二傳輸裝置4、5的反射性，以一 2字 形路徑依序傳遞至該等傳輸裝置4、5，並藉該第二傳輸裝 置5的濾膜52的穿透性將該一次光光束（λ。）過濾形成複數 特疋波長|巳圍的二次光光束（意即入〗，，、人2”、人3”、入4”）， 由該等傳輸光纖53分別輸出以形成一分光作用。 參閱圖5,本發明之光波導低密度波長多工器的一第 二較佳實施例，大致上是與該第一較佳實施例相同。其不 同處在於，該第一傳輸裝置4的細部結構，及該第二傳輸 裝置5的每一傳輸單元50所過濾的特定波長範圍。 該第一傳輸裝置4更呈現有一穿透性。該第一傳輸裝 置4是具有複數相間隔地設置在該第一側面21上的傳輪 單tl 40。該第一傳輸裝f 4的每一傳輸單元4〇具有一傳 輸接頭42、一形成在該傳輸接頭42上的濾膜43及_設置 在4傳輸接頭42内的傳輸光纖44。該第—傳輸裝置4的 每一傳輸接頭42的一中心軸線是與該第一側面21爽一第 二夾角（β)。由此，該第一傳輸裝置4的該等濾膜杓分別 10 1234952 對一對應的特定波長範圍的光呈現有一穿透性，且對其餘 波長範圍呈現有一反射性。 該一次光光束（λ。）藉該波導晶片2及該等傳輸裝置 4、5的濾膜43、52的反射性，以一 ζ字形路徑依序傳遞 5 至該等傳輸裝置4、5,並藉該等傳輸裝置4、5的濾膜43、 52的穿透性將該—次光光束㈤過濾形成複數特定波長範 圍的二次光光束（意即入,，、入2，、λ3，、人4,、入5，、入6，、L，、 h )，由該等傳輸裝置4、5的傳輸光纖44、53分別輸出 以形成一分光作用。 10 由上面所述，本發明之光波導低密度波長多工器具有 下列數項特點： 一、利用具有光學迴路的該波導晶片2可取代並節省 習知的折射率漸變透鏡之使用量。另外，由於該波導晶片 2兀件微小化，相形之下也節省使用空間。 15 _ 一、该波導晶片2上的光學迴路是利用微影蝕刻的精 雀製私方式所形成。因此，該一次光光束（入〇)在一入射角 偏差上的問題，將遠低於習知利用機械加工組裝時所產生 的問題，可有效降低如偏振依賴損失等所帶來的光損耗。 本發明之光波導低密度波長多工器具有元件微小 化使用空間小、光學精準度高及光損耗低等特點，確實 達到本發明之目的。 准以上所述者，僅為本發明之較佳實施例而已，當不 此X此限疋本發明貫施之範圍，即大凡依本發明申請專利 乾圍及發明說明書内容所作之簡單的等效變化與修飾，皆 1234952 應仍屬本發明專利涵蓋之範圍内。 【圓式簡單說明】 5 圖1是一俯視示意圖，說明一 一種習务 割多工器； < 2字形波長分 圖2是一局部剖面示意圖，說明該 細部結構； 舀知之一輸入端的 輸出端的 圖3是一局部剖面示意圖，說明該習知之 細部結構； 圖4是一俯視示意圖，說明本發明之光波導低密度波 長多工器的一第一較佳實施例；及 圖5疋一俯視示意圖，說明本發明之光波導低密度波 長多工器的一第二較佳實施例。 12 1234952 【圖式之主要元件代表符號簡單說明】 2……" 41…… ……反射膜 21…… ......第一側面 42…… …···傳輸接頭 22…… ......苐一側面 43…… ……濾膜 3".…" …···輸入單元 44…… ......傳輸光纖 31…… ……輸入接頭 5……·· ……第二傳輸裝置 32…… ……抗反射膜 50…… ……傳輸單元 33…… ......輸入光纖 51…… ……傳輸接頭 4 ……第一傳輸裝置 52…… ……濾膜 40…… .……傳輸單元 53…… 131234952 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to an optical waveguide wavelength multiplexer, and particularly to a kind of optical waveguide low-density wavelength multiplexer (CWDM). [Previous Technology] With the increasing popularity of the Internet and the rapid growth of high transmission capacity, optical fiber communication architecture and other transmission methods have begun to enter the wavelength multiplexing communication system (Wavelength 10 combining time multiplexing and wavelength multiplexing). Division Multiplexing; WM) era. Referring to FIG. 1, FIG. 2 and FIG. 3, a conventional zigzag wavelength division multiplexer 1 is also called a zigzag wavelength division multiplexer. The zigzag wavelength division multiplexer 1 includes: an intermediate block 11, an input terminal 12 and a complex output terminal 13. The intermediate block 11 is a solid and transparent substrate, and has a first side edge 111 and a second side edge 112 opposite to the first side edge U1. The input end 12 is disposed on the first side edge 1 of the intermediate block 11 and has a first sleeve 121 and an optical collimator (optical col 1 imator) disposed in the first sleeve 121 20. ) 122. A central axis of the first sleeve 121 is at an angle between the first side edge ιη and an angle between 75 degrees and 90 degrees. 'The resin is fixed to the resin with a thermosetting resin (thermose). A fixing object 123 having an opening 124 is provided on the first side edge in. The optical collimator 122 is fixed on the fixed object 123 by using a heat-curing 1234952 resin, and is composed of a glass tube, at least one graclient index lens (GRIN lens), A glass ferrule disposed in the glass tube at a distance from the refractive index gradient lens and a transmission optical fiber 5 disposed in the glass ferrule (not shown). The output terminals 13 are respectively disposed on the first and second sides 111 and 112 at intervals. In order to facilitate the description of the detailed structure of the output terminal 13, it is described below with reference to FIG. Each output terminal 13 has a second sleeve 131, an optical collimator 132, and a filter 133. 10 The second sleeve 13 丨 is fixed to the second side edge 112 by a thermosetting resin, and has a fixing member 134 having an opening 135, and a first interval is defined by the fixing member 134. The tubular portion 136 and a second tubular portion 137. A second included angle ′ between a central axis l of the first tubular portion 136 and a central axis L2 of the second tubular portion 137, and an open surface of the second tubular portion 137 and the central axis L2 At a vertical angle. The optical collimator 132 is disposed on the first tubular portion 136 and is fixed on the fixed object 134 by using a thermosetting resin. The optical collimator 132 has a refractive index gradient lens 138 fixed on the fixed object 134, a spacer 139, a glass sleeve 20 circles 140 spaced from the refractive index gradient lens 138, and a glass sleeve 140 disposed on the The transmission fiber 141 in the glass ferrule 140. Among them, the spacer 139 fixes the refractive index gradient lens ι38 and the glass ferrule 140 to each other by a thermosetting resin. The filter 133 is disposed on the second tubular portion ι37 and is fixed to the fixture 134 by a thermosetting resin. 1234952 Among them, the input terminal 12 can transmit a multi-channel primary light beam (primary beam; meaning a beam having ^, L, ^), and use the filters provided in the output terminals 3 133 The primary light beam is sequentially transmitted to each output terminal 13 in a zigzag path, and the primary light beam is filtered into a single-channel of a plurality of specific frequency ranges by the fifth-grade filter I33. Secondary light beam (secondaq beam; meaning that the output terminals 13 each have only the secondary light beam of the single band) to form a spectroscopic effect. Because this Z-shaped wavelength division multiplexer is assembled by 10 methods of mechanical processing, and the accuracy is difficult to control during the assembly process. Therefore, when a deviation occurs at an incident angle of the primary light beam, it will cause the frequency change and polarization dependent loss (polarization dependent loss) of the filters 133 when the secondary light beams are filtered to form the secondary light beams. And other issues. In addition, since the fold-emissivity gradient lenses of the optical collimators mentioned above will increase according to the requirements of the optical design, the use space is also increased in comparison. In summary, how to solve the problems of the Z-shaped wavelength division multiplexer that causes optical loss in the assembly process and saves the use of space is a major problem that the current industry related to the development of the z-shaped wavelength division multiplexer needs to overcome. [Summary of the Invention] Therefore, the object of the present invention is to provide an optical waveguide low-density wavelength multiplexer. The optical waveguide low-density wavelength multiplexer of the present invention includes: a waveguide chip (wave-guide chipset), an input unit, a first transmission device 1234952, and a second transmission device. The waveguide wafer has a -first side surface and a second side surface opposite to the first side surface, and an optical circuit is formed on the waveguide wafer. Preferably, the first side surface may be parallel to the second side surface. 5 The input unit is disposed on the first side of the waveguide wafer, and has an input connector (glass ferrule) and an input fiber disposed in the input connector and transmitting a multi-wavelength-secondary light beam. A central axis of one of the input joints is a first central angle with the first side. The first transmission device is spaced apart from the input unit on the tenth side surface and exhibits a reflective property. The second transmission device has a plurality of transmission units disposed at intervals on the second side. Each transmission unit has a transmission joint, a ferrule formed on the transmission joint, and a transmission wheel optical fiber arranged in the transmission joint, and the —center axis of each transmission joint is clamped with the second side— 15 First angle. Films such as 1H, etc. are transparent to the corresponding wavelengths of light, and are reflective to the remaining wavelengths. The — secondary light beam is sequentially transmitted to the transmission devices in a zigzag path by the waveguide wafer, the reflection I * of the first and second transmission devices, and the penetrability of the first transmission device transmits the The primary light beam is filtered to form a plurality of specific 20; secondary light beams with a skin length of 11 are output through the transmission fibers respectively to form a spectroscopic effect. The effect of the present invention is that the waveguide wafer manufactured by using a photolithography method in a semiconductor manufacturing process and the like replaces a conventional refractive index gradient lens, so as to save the use of a multiplexer by 1234952 And improve the accuracy of the optical path. [Embodiment] The foregoing and other technical contents, features, and effects of the present invention will be clearly understood in the detailed description of the two preferred embodiments with reference to the drawings. Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same reference numerals. Referring to FIG. 4, a first preferred embodiment of the optical waveguide low-density wavelength multiplexer according to the present invention includes a waveguide chip 2, an input unit 3, a first transmission device 4 and a second transmission device 5. The waveguide 30 has a first side surface 21 and a second side surface 22 opposite to the first side surface 21. An optical circuit (not shown) is formed on the waveguide wafer 2 by using the lithography engraving. Preferably, the first side surface 21 can be parallel to the second side surface 22. The input unit 3 is disposed on the first side surface 21 of the waveguide wafer 2 and has an input connector 31, an anti-reflective coating (AR coating) 32 formed on the input connector 31, and a device. An input optical fiber 33 of a multi-band primary light beam (λ0) is transmitted in the input connector 31. A central axis of the input joint 31 is a first included angle (α) with the first side surface 21. Generally speaking, the first included angle range is approximately 82 degrees to 84 degrees. The first transmission device 4 and the input unit 3 are disposed on the first side surface 21, and the first transmission device 4 is a reflective film 41 which has a reflective property. 〇1234952 The second transmission device 5 has a plurality of spaced intervals. The transmission unit 50 is provided on the second side surface 22. Each transmission unit 50 has a transmission joint 51, a filter film 52 formed on the transmission joint 51, and a transmission fiber 53 disposed in the transmission joint 51, and a central axis of each transmission joint 51 Is a second included angle (β) with the second side surface 22. The filter films 52 respectively have a penetrability for a corresponding specific wavelength range of light and a reflectivity for the remaining wavelength ranges. The primary light beam (λ〇) is sequentially transmitted to the transmission devices 4 in a zigzag path by the reflectivity of the optical circuit g of the waveguide wafer 2 and the first and second transmission devices 4 and 5. , 5, and by virtue of the penetrability of the filter film 52 of the second transmission device 5, the primary light beam (λ.) Is filtered to form a secondary light beam with a specific wavelength | People 2 ", 3", and 4 ") are output by the transmission fibers 53 to form a beam splitting effect. Referring to FIG. 5, a second preferred embodiment of the optical waveguide low-density wavelength multiplexer of the present invention Is substantially the same as the first preferred embodiment. The difference lies in the detailed structure of the first transmission device 4 and the specific wavelength range filtered by each transmission unit 50 of the second transmission device 5. The The first transmission device 4 further has a penetrability. The first transmission device 4 is a transmission wheel tl 40 having a plurality of phase intervals disposed on the first side surface 21. Each transmission of the first transmission device f 4 The unit 40 has a transmission joint 42, a filter film 43 formed on the transmission joint 42, and A transmission fiber 44 disposed in the 4 transmission connector 42. A central axis of each transmission connector 42 of the first transmission device 4 is a second angle (β) with the first side surface 21. Therefore, the first The filter membranes 10 of the transmission device 4 respectively exhibit a transmissivity to light corresponding to a specific wavelength range and a reflectivity to the remaining wavelength ranges. The primary light beam (λ.) Borrows the waveguide wafer 2 And the reflectivity of the filter films 43 and 52 of the transmission devices 4 and 5 are sequentially transmitted to the transmission devices 4 and 5 in a zigzag path, and the filter films 43 and 5 of the transmission devices 4 and 5 are borrowed. The penetrability of 52 filters the secondary light beam to form a secondary light beam of a plurality of specific wavelength ranges (meaning that ,,,, 2 ,, λ3, 4, 4, 5, 6, 6, and L , H) are output by the transmission fibers 44, 53 of these transmission devices 4, 5 respectively to form a spectroscopic effect. 10 From the above, the optical waveguide low-density wavelength multiplexer of the present invention has the following features: I. Using the waveguide wafer 2 with an optical circuit can replace and save the conventional refractive index gradually The amount of lens used. In addition, due to the miniaturization of the components of the waveguide wafer 2, the use of space is also saved in comparison. 15 _ 1. The optical circuit on the waveguide wafer 2 is formed by the fine etching method using lithographic etching. Therefore, the problem of the deviation of the incident angle of the primary light beam (into 0) at an incident angle will be much lower than that caused by conventional machining and assembly, which can effectively reduce the optical loss such as polarization dependence loss. The optical waveguide low-density wavelength multiplexer of the present invention has the characteristics of miniaturizing the use of components, small space for use, high optical accuracy, and low optical loss, etc., and indeed achieves the purpose of the present invention. The ones described above are only the preferred implementation of the present invention. For example, when this X is not limited, it is the scope of the present invention, that is, simple equivalent changes and modifications made according to the patent application scope and the description of the invention, which are all 1234952 should still be covered by the invention patent Within range. [Circular brief description] 5 Figure 1 is a schematic plan view illustrating a custom multiplexer; < 2 wavelength profile Figure 2 is a partial cross-sectional schematic illustrating the detailed structure; the output of one of the known inputs FIG. 3 at the end is a schematic partial cross-sectional view illustrating the conventional detailed structure; FIG. 4 is a schematic top view illustrating a first preferred embodiment of the optical waveguide low-density wavelength multiplexer of the present invention; and FIG. 5 is a top view A schematic diagram illustrating a second preferred embodiment of the optical waveguide low-density wavelength multiplexer of the present invention. 12 1234952 [Simplified explanation of the representative symbols of the main elements of the drawing] 2 …… " 41 …… …… Reflective film 21 …… …… First side 42 ……… ·· Transmission connector 22 ……. ..... 苐 One side 43 ………… Filter membrane 3 " .... "… ·· Input unit 44 …… …… Transmission fiber 31 …… …… Input connector 5 …… ·· …… Second transmission device 32 ………… Anti-reflection film 50 ………… Transmission unit 33 ………… Input fiber 51 ………… Transmission connector 4 …… First transmission device 52 ……… … Filter membrane 40 ……. …… Transfer unit 53 …… 13