1264901 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種混合乙太網路與射頻訊號之 單一波長光纖通信系統，尤指一種利用馬克干赫調^哭 將經過數位直接調變之光訊號再次調變，整合不同傳ς 型態的射頻訊號於數位光網路上，並透過光電元件來^ ，號對光電轉換，以利用光纖特性來實現低通道損耗和 高容量的高速傳輸。 【先前技術】 在光纖通仏系統中，為了增加通道的利用率和網路 交換的便利性，所以必須允許不同型態的信號可以在同 一個通道中傳送，通常會以下列三種方式來實現： 1. 光波長多工（WDM，wavelength divis丨on multiplexing) 此種方式提供了不同波長下訊號間有足夠的波長間 距，類似電訊號下頻率多工的方式，可用來區隔不同 信號在電訊號下相同操作頻率（類比）或操作速率（數 位）的干擾，因此可使數位信號以高位元率運作。 2. 電頻率多工（FDM，frequency division mu_丨exing): 此方法利用不同載波頻率來分隔不同訊號型態，但數 位信號所佔的頻寬會隨著位元率的增加而上升，所以 必須將訊號間的頻率間距加大，以減少干擾，因此在 較高速率的操作下通道中的頻道數會減少；再者，可 1264901 搭配使用多相位相角調變（M_p (M_QAM)的方式夕鄕银H交 士』+ Λ 位兀（blt)轉換到符碼（symbol)的 產生數位況號的傳輪符碼率，以減少傳輸頻 I 〇 、 3·光極化正交多工：欲利用單一光源同時傳遞兩種訊 號’為了讓此兩訊號不會彼此干擾，故將兩者分別承 載於单-波長之兩正交極化之上，使得單一波長得以 同時傳第兩種訊號。 目刚使用上述的二種方法會有光信號設備複雜 士高或數位信號位元率低的問題產生，而無法 鬲位元率和設備成本。 求侑 【發明内容】 本發明之主要目的係在於可使用目前已存在的射頻 ”乙太網路標準系統，將兩者射頻和數位的特性結合在 單一波長的光纖傳輸系統中，促使乙太網路與射頻^统 =幹簡便化，以不大幅更動現有傳輸設備下，使通道 各里加大，有利於系統業者提供多項性的服務。 為達上述之目的，本發明係一種混合乙太網路與射頻訊 號之單一波長光纖通信系統，係由一馬克干赫調變器混 合光乙太網路訊號模組與射頻信號之調變方式，在馬克 干赫凋艾态光輸入端輸入光乙太網路訊號模組信號，”射 頻輸入端輸入射頻信號，在其輸出端便是具有兩個信號 之光訊號；而該系統包含有··一由光源訊號單元及第一 1264901 光纖構成之光乙太網路訊號模組，可由本地產生或是由 上層繼承之直調光乙太（數位）網路訊號；一與第一光 纖連接之馬克干赫電光調變器及電氣射頻訊號單元所構 成之混合訊號模組，係將直調光乙太網路訊號在此混合 訊號模組内合成一單一光波長之混合訊號；一以第二光 纖與馬克干赫光電調㈣連接之傳遞模組，係為往下層 網路傳遞之通道；-與第二光纖連接之光電轉換接收 • 器、數位應用端以及射頻應用端所構成之接收模組，可 將由傳遞模組傳遞過來之單—波長混合光訊號還原成各 自之獨立訊號並轉換至各個應用端，該接收模組係，該 數位應用端係接受由光源訊號單元傳遞出之訊息，而該 射頻應用端係接收由電氣射頻訊號單元傳遞出之訊息。 【實施方式】 請參閱『第1〜6圖』所示，係分別為本發明之系統 • 架構不意圖、光電轉換接收器示意圖、直調之數位光信 號之光譜不意圖（進入馬克干赫調變器之前）、射頻信號 頻譜示意圖（驅動馬克干赫調變器之前）、經二次調變含ϋ 數位、射頻兩信號之光譜示意圖（馬克干赫調變器輸出 端）以及經光電轉換接受器之電頻譜示意圖。如圖所示： 本發明係-種混合乙太網路與射頻訊號之單—波長光纖 通信系統，其係由一光乙太網路訊號模組i、一混合訊 唬杈組2、一傳遞模組3及一接收模組4所構成，由混 合訊號模組2混合光乙太網路訊號模組i與射頻信號之 1264901 調變方式，在混合訊號模組2光輸入端輸入光乙太網路 訊號模組1信號，射頻輸入端輸入射頻信號，在其輸出 端便是具有兩個信號之光訊號。 上述所提之光乙太網路訊號模組1，可由本地產生 或是由上層繼承之光乙太（數位）網路訊號，該光乙太 網路訊號模組1係由一光源訊號單元1 1、及一與光源 訊號單元1 1連接之第一光纖1 2所構成，該光源訊號 單元1 1為一直調式訊號（如第3圖所示），其來源係直 接透過任何型態之光調變器（MZM或EAM等）或是雷射 光源（LD)所產生，亦可為從上層數位光網路繼承下來 的訊號，且該雷射光源可使用850nm、131 Onm和1550nm 現有規格之光通訊光源，而第一光纖1 2可為單模（SMF， Single Mode Fiber)，或為各種類行多模光纖（如PMF， Polarization Mode Fiber…etc)。 该混合訊號模組2係將與光乙太網路訊號模組1之 網路訊號所產生之電氣形式射頻訊號（如第4圖所示） 在單一光波長中合成混合訊號，該混合訊號模組2係由 一與上述第一光纖12連接之馬克干赫光電調變器2 1、及一與馬克干赫光電調變器2 ]_連接之電氣射頻訊 號单元2 2所構成’该馬克干赫電光調變器2 1 (MZ-EOM, Mach-Zehnder Electric-to-Optic Modulator, 或簡稱馬克干赫調變器『MZM，Mach-Zehnder Modulator』），具備幾個主要的輸入、輸出埠··光輸入（從1264901 IX. Description of the Invention: [Technical Field] The present invention relates to a single-wavelength optical fiber communication system for mixing Ethernet and radio frequency signals, and more particularly, a digital direct modulation using a Mark Gancher The optical signal is tuned again, and the different types of RF signals are integrated on the digital optical network, and the photoelectric conversion is performed through the photoelectric components to utilize the characteristics of the optical fiber to realize low-channel loss and high-capacity high-speed transmission. [Prior Art] In the fiber-optic wanted system, in order to increase the utilization of the channel and the convenience of network switching, it is necessary to allow different types of signals to be transmitted in the same channel, which is usually implemented in the following three ways: 1. Wavelength multiplex multiplexing (WDM) This method provides sufficient wavelength spacing between signals at different wavelengths, similar to the frequency multiplexing under the signal, which can be used to separate different signals in the electrical signal. The interference of the same operating frequency (analog) or operating rate (digital), so that the digital signal can operate at a high bit rate. 2. Frequency division mu_丨exing: This method uses different carrier frequencies to separate different signal types, but the bandwidth occupied by digital signals increases with the increase of the bit rate, so The frequency spacing between the signals must be increased to reduce interference, so the number of channels in the channel will be reduced at higher rate operation; in addition, 1264901 can be used with multi-phase phase angle modulation (M_p (M_QAM))夕鄕银H交士』+ Λ bit 兀(blt) converts to the symbolic rate of the symbolic number generated by the symbol to reduce the transmission frequency I 〇, 3· optical polarization orthogonal multiplexing: To transmit two signals simultaneously using a single light source', in order to prevent the two signals from interfering with each other, the two signals are respectively carried on the two orthogonal polarizations of single-wavelength, so that a single wavelength can transmit the second signal at the same time. The use of the above two methods has the problem that the optical signal device has a low complexity or a low bit rate of the digital signal, and the bit rate and the device cost cannot be obtained. SUMMARY OF THE INVENTION The main object of the present invention is Available The existing radio frequency "Ethernet standard system" combines the radio frequency and digital characteristics of the two in a single-wavelength optical fiber transmission system, which facilitates the simplicity and simplicity of Ethernet and RF to not significantly change the existing transmission. Under the equipment, the channels are increased, which is beneficial to the system provider to provide multi-sex services. For the above purpose, the present invention is a single-wavelength optical fiber communication system for mixing Ethernet and radio frequency signals, which is a Mark Ganhe. The modulator mixes the optical Ethernet signal module and the RF signal modulation mode, and inputs the optical Ethernet signal module signal at the mark dry-light state input terminal, "the RF input terminal inputs the RF signal, The output end is an optical signal with two signals; and the system comprises an optical Ethernet signal module composed of a light source signal unit and a first 1264901 optical fiber, which can be generated locally or inherited by the upper layer. Directly dimming the optical (digital) network signal; a mixed signal module consisting of a Markanghe electro-optical modulator and an electrical RF signal unit connected to the first optical fiber The dimming Ethernet signal synthesizes a mixed signal of a single optical wavelength in the mixed signal module; a transmission module connected with the second optical fiber and the Mark Ganhe photoelectric (four) is a channel for transmitting to the lower layer network The receiving module formed by the photoelectric conversion receiving device, the digital application end and the RF application end connected to the second optical fiber can restore the single-wavelength mixed optical signals transmitted by the transmitting module to their respective independent signals and convert To each application end, the receiving module is configured to receive a message transmitted by the light source signal unit, and the RF application end receives the message transmitted by the electrical RF signal unit. [Embodiment] Please refer to The first to sixth figures are the system of the present invention, the architecture is not intended, the photoelectric conversion receiver is schematic, the spectrum of the digital signal of the direct adjustment is not intended (before entering the Markanger modulator), and the RF signal Schematic diagram of the spectrum (before driving the Markanghe modulator), the second harmonic modulation of the ϋ-containing digits, and the two signals of the RF signal (Mark Ganhe modulation) An output terminal) and an electrical spectrum after photoelectric conversion receiver of FIG. As shown in the figure: The present invention is a single-wavelength optical fiber communication system for mixing Ethernet and radio frequency signals, which is transmitted by a light Ethernet signal module i, a hybrid signal group 2, and a transmission The module 3 and the receiving module 4 are configured, and the mixed signal module 2 mixes the optical Ethernet signal module i and the RF signal 1264901 modulation mode, and inputs the light at the optical input end of the mixed signal module 2 The network signal module 1 signal, the RF input terminal inputs the RF signal, and at its output is the optical signal with two signals. The above-mentioned optical Ethernet signal module 1 can be locally generated or transmitted by the upper layer of the optical Ethernet (digital) network signal, and the optical Ethernet signal module 1 is composed of a light source signal unit 1 1. A first optical fiber 12 connected to the light source signal unit 1 1 , wherein the light source signal unit 1 is a constant-modulation signal (as shown in FIG. 3 ), and the source is directly transmitted through any type of light. The transformer (MZM or EAM, etc.) or the laser source (LD) can also be generated from the upper digital optical network, and the laser source can use 850nm, 131 Onm and 1550nm existing specifications. The communication light source, and the first optical fiber 12 can be a single mode (SMF, Single Mode Fiber), or a variety of multi-mode fiber (such as PMF, Polarization Mode Fiber...etc). The mixed signal module 2 combines the electrical form RF signals generated by the network signal of the optical Ethernet signal module 1 (as shown in FIG. 4) into a mixed signal in a single optical wavelength, the mixed signal mode. The group 2 is composed of a Markganhe photoelectric modulator 2 1 connected to the first optical fiber 12 and an electrical RF signal unit 2 2 connected to the Markanghe photoelectric modulator 2]_ MZ-EOM, Mach-Zehnder Electric-to-Optic Modulator, or Mach-Zehnder Modulator for short, has several main inputs and outputs. ·Light input (from
9 (D 1264901 12進入之訊號）、光輸出（:輸出至31之訊號）、直流電壓 (vbias)輸入、射頻電訊號輸入（Vrf)(圖未示），而電 氣射頻§fl號單元2 2係為一具備載波（carrier)之調變 訊號（Modulated Signal)。 滅傳遞模組3係為往下層網路傳遞之通道，該傳遞 模組3係為一與馬克干赫光電調變器2 1連接之第二光 纖3 1 ’該第二光纖3 1可為單模（SMF，Single Mode φ Flber)，或為各種類行多模光纖（如PMF，Polarization9 (D 1264901 12 incoming signal), optical output (: output to 31 signal), DC voltage (vbias) input, RF signal input (Vrf) (not shown), and electrical RF §fl unit 2 2 It is a modulated signal with a carrier. The transmission module 3 is a channel for transmitting to the lower layer network, and the transmission module 3 is a second optical fiber 3 1 connected to the Markganhe photoelectric modulator 2 1 'the second optical fiber 3 1 can be a single Mode (SMF, Single Mode φ Flber), or for various types of multimode fiber (such as PMF, Polarization)
Mode Fiber…etc) 〇 • 該接收模組4可將由傳遞模組3傳遞過來之單一波 • 長混合光訊號（如第5圖所示），還原成各自之獨立訊號 並轉換至各個應用端，而該接收模組4所還原之獨立訊 號可視系統與電路頻寬傳輸1〇〇Mb/s至1〇Gb/s不等，射 頻吼號載波頻率為該數位訊號位元率之1 5倍以上，（數位 1_25Gb/s，則射頻訊號載波應在1.875GHz以上），該接收 鲁模組4係由一與上述第二光纖31連接之光電轉換接收 器4 1、一與光電轉換接收器4 1連接之數位應用端4 2、以及一與光電轉換接收器4 1連接之射頻應用端4 3所構成’該數位應用端4 1係接受由光源訊號單元1 1傳遞出之訊息，而該射頻應用端4 3係接收由電氣射 頻訊號單元2 2傳遞出之訊息，且該接收模組4之混合 光訊號由第二光纖3 1接入光電轉換接收器4 1連接 後’先產生原傳送端的混合電訊號，將此訊號分成兩個 1264901 刀類比/數位^虎（如第6圖所示），即類比/數位有線 甩二見的m接與低通濾、波器連接，連接—電視訊號放 大為後即可輸出原來的訊號，而乙太信號接以一高通滤 波器，再以混波器進行降頻的動作，解回帶有封包形式 的原數位乙太信號，透過低通濾波器再解回無封包形式 的訊號，之後可接-限制放大器放大此訊號，而該接收 模組4之光電轉換接收器4工更進一步包含有：光二極 體4 1 1 ( PD，Photodiode)，係、與第二光纖3丄連接， 由半導體製作完成，如PIN、APD、及MSM等，將接受到 之光功率轉換為電功率；放大器4丄2，係與光二極體 4 1 1連接，可依不同轉換之需求採用轉阻放大器（丁丨a， Transimpedance Amp丨mer)或是一般放大器形式；功率 分歧器4 1 3 ( Power Splitter)，係與放大器4丄2連 接，將輸入之功率平均分為兩個路徑傳遞至兩級；低通 濾波器4 1 4 (LPF，L〇w_PassR|ter)，係與功率分歧器 4 1 3連接後與數位應用端4 2連接；帶通濾波器4工 5 (BPF，Band-PassFilter)，係與功率分歧器4工3連 接後與射頻應用端4 3連接，其中，該功率分歧器4工 3係以傳輸線理論設計並在印刷電路板上製作，升/降頻 數位信號的載波為設計的中心頻率，威爾京生功率分波 器（Wilkinson power divier)、90/180度分波/混波器 (90/180° hybrid )或耦合器（coupler)可依方向性來當作 合併或分離用，該低通濾波器語4 4帶通濾波器可使 1264901 用表面黏接元件（SMD)、步階/姊式傳輪線或表面 元件（s_混合傳輸線設計來製作濾、波器，可彈性的 並製作符合規格之低通濾波器。 又。 …請參閱『第7及第8圖』所示，係本發明馬克干赫 调變器的元件特性訊號特性曲線圖即馬克干赫調變器的 光、電兩個不同輸入埠之頻譜示意圖。如圖所示：由。於 高速傳輸率網路服務的要求日趨增加，因此對於如射頻 信號6和數位乙太網路/網際網路的整合是未來的趨勢和 目:票；目前的光纖傳輸系統中，數位信號5和射頻信號 6若要同時在同-通道（即光纖）中傳輸時，需使用分波長 的方式來將數位和射頻信號6分㈣林㈣波長下傳 达，但所需要的設備必須包含兩個以上的穩定雷射光 源:光，合器和光遽波器等，且通道容量依賴光元件的 好壞决疋，因此，設備複雜度和成品相對較高；為了有 利^射頻5fl5虎和乙太網路的結合，並在不更動或增加光 通信系統中的光設備下，可以使用電訊號混和的方式來 進行射4和數位#號5的結合，在有限的電路和電設備 ^頁足下，以單一波長的來同時傳送兩種不同形式的訊號。 本發明即使用一馬克干赫調變器2 1，其大訊號模 型可以用下列方程式表示： I〇u^Va^〇pt)^~Iopi(t) l-cos^^«^/ 其中丨〇ut(Va，I0pt)表示隨著電壓Va⑴變化的光強度； 甩壓^⑴變是驅動馬克干赫調變器2 1的訊號，包含了 12 ⑧ 1264901 馬克干赫調變器2 1的偏慰 2 "； ；，0^ -波長多工應用:/Ϊ輸二車的光強度，在傳統非單 用丨ST ^ 〇Pt疋里（常數），在此，我們利 =7為：、時變函數的特性來達到單-波長多工之應 一 4半波長$塵’ ^靜態相位移，這兩個變數表 :母個馬克干赫調變器2 1的元件特性，皆為定值，不 應用改變。如上被古名口 α Μ 过方耘式所不，其大訊號特性曲線如 第7圖所示。 如第8圖所示之頻譜，我們利用馬克干赫調變器2 1的光、電兩個不同輸入埠，來達到兩個不同訊號同時 承載在單一波長上的目的，再將接收光訊號還原成電氣 吼唬之頻譜。數位信號5的頻譜頻寬隨著位元率的上升 而增加，因此為了在無使用的頻帶下承載其他的射頻信 號6,就必須與此射頻信號6之頻率遠離數位信號5的 位凡率；在數位信號5頻譜對射頻信號6造成的訊雜比 (SNR)可接受的範圍，並且射頻信號6又能不對數位信號 5的錯誤率（BER)造成影響，數位信號5的功率、射頻信 戒6的功率及頻率都必須要隨著兩個信號之要求及馬克 干赫調變器2 1、光電轉換接收器4 1之狀況進行最佳 化。Mode Fiber...etc) 接收• The receiving module 4 can restore the single wave long mixed optical signal (shown in Figure 5) transmitted by the transmitting module 3 to their respective independent signals and convert them to each application. The independent signal visual system restored by the receiving module 4 and the circuit bandwidth are transmitted from 1 〇〇 Mb/s to 1 〇 Gb/s, and the RF 载波 carrier frequency is more than 15 times the bit rate of the digital signal. (Digital 1_25 Gb/s, the RF signal carrier should be above 1.875 GHz), the receiving Lu module 4 is a photoelectric conversion receiver 4 1 connected to the second optical fiber 31, and a photoelectric conversion receiver 4 1 The digital application terminal 4 2 and the RF application terminal 43 connected to the photoelectric conversion receiver 4 1 constitute the 'digital application terminal 4 1 accepting the message transmitted by the light source signal unit 1 1 , and the radio frequency application The terminal 4 3 receives the message transmitted by the electrical RF signal unit 2 2 , and the mixed optical signal of the receiving module 4 is connected to the photoelectric conversion receiver 4 1 by the second optical fiber 3 1 to generate a mixture of the original transmitting end. Telecommunications, divide this signal into two 126490 1 knife analog / digital ^ tiger (as shown in Figure 6), that is, the analog / digital cable 甩 的 m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m The Ethernet signal is connected to a high-pass filter, and then the down-converter is performed by the mixer, and the original digital Ethernet signal with the packet form is decoded, and the signal without the packet form is decoded through the low-pass filter, and then The connection-limit amplifier amplifies the signal, and the photoelectric conversion receiver 4 of the receiving module 4 further includes: a photodiode 4 1 1 (PD, Photodiode), connected to the second optical fiber 3, by the semiconductor After the production is completed, such as PIN, APD, and MSM, the received optical power is converted into electric power; the amplifier 4丄2 is connected to the optical diode 4 1 1 , and the transimpedance amplifier can be used according to different conversion requirements (Ding Wei) a, Transimpedance Amp丨mer) or a general amplifier form; the power splitter 4 1 3 (Power Splitter), connected to the amplifier 4丄2, divides the input power into two paths equally into two stages; low-pass filtering 4 1 4 (LPF, L〇w_P assR|ter), connected with the power splitter 4 1 3 and connected to the digital application terminal 4 2; bandpass filter 4 work 5 (BPF, Band-PassFilter), connected with the power splitter 4 work 3 and RF The application terminal 43 is connected, wherein the power splitter 4 is designed by the transmission line theory and fabricated on the printed circuit board, and the carrier of the rising/lowering digital signal is the designed center frequency, and the Wilkinson power splitter (Wilkinson power divier), 90/180 degree splitter/mixer (90/180° hybrid) or coupler (coupler) can be used for merging or separating depending on the directionality. The pass filter allows the 1264901 to use a surface mount component (SMD), a step/姊 transfer line or a surface component (s_hybrid transmission line design to create a filter, a waver, and to be flexible and to produce a low pass filter that meets specifications. Device. also. ...Please refer to "Figures 7 and 8" for the component characteristic signal characteristic diagram of the Markganhe modulator of the present invention, that is, the spectrum diagram of the two different input ports of the Markanghe modulator. As shown: by. The demand for high-speed transmission rate network services is increasing, so the integration of such as RF signal 6 and digital Ethernet/Internet is the future trend and goal: ticket; in current optical fiber transmission systems, digital signal 5 and If the RF signal 6 is to be transmitted in the same channel (ie, fiber) at the same time, the wavelength and the RF signal should be transmitted in 6 (4) (four) wavelengths, but the required equipment must contain more than two. Stable laser source: light, combiner and optical chopper, etc., and the channel capacity depends on the quality of the optical components, so the complexity of the device and the finished product is relatively high; in order to benefit the RF 5fl5 Tiger and Ethernet The combination, and without changing or increasing the optical equipment in the optical communication system, the combination of the radio 4 and the digit #5 can be performed by means of the electric signal mixing, under the limited circuit and the electric equipment, with a single The wavelengths are used to simultaneously transmit two different forms of signals. The present invention uses a Markanghe modulator 2, and its large signal model can be expressed by the following equation: I〇u^Va^〇pt)^~Iopi(t) l-cos^^«^/ where 丨〇 Ut (Va, I0pt) represents the light intensity as a function of voltage Va(1); 甩^(1) is the signal that drives the Markanger modulator 2 1 and contains the eccentricity of the 12 8 1264901 Mark Gancher modulator 2 1 2 ";;,0^ - Wavelength multiplexing application: / Light transmission intensity of the two cars, in the traditional non-single use ^ST ^ 〇Pt疋 (constant), here we benefit = 7 for:, hour The characteristics of the variable function to achieve a single-wavelength multiplex should be a 4 half-wavelength $dust' ^ static phase shift, these two variables table: the component characteristics of the mother Marker modulator 2 1 are all fixed values, No changes are applied. As shown above, the characteristic curve of the big signal is as shown in Figure 7 by the ancient name. As shown in Figure 8, we use the two different input ports of the Markanghe modulator 2 1 to achieve the purpose of simultaneously carrying two different signals on a single wavelength, and then restore the received optical signal. The spectrum of electricity into electricity. The spectral bandwidth of the digital signal 5 increases as the bit rate increases. Therefore, in order to carry other radio frequency signals 6 in the unused frequency band, the frequency of the radio frequency signal 6 must be away from the bit rate of the digital signal 5; The signal-to-noise ratio (SNR) caused by the digital signal 5 spectrum to the radio frequency signal 6 is acceptable, and the radio frequency signal 6 can not affect the error rate (BER) of the digital signal 5, the power of the digital signal 5, the radio frequency signal ring The power and frequency of 6 must be optimized with the requirements of the two signals and the condition of the Markanger modulator 21 and the photoelectric converter receiver 41.
射頻信號6上乘載之訊號隨著不同的調變方式，對 數位信號5造成訊雜比有不同的要求，而一般直接調變 之數位光信號亦隨著不同的標準（如SONET 〇C-n、SHD 13 ⑧ 1264901 STM-m，n，m = 1, 2, 3,…etc)有不同的信號方式（NZ、 NRZ等），對兩個信號之功率強度、射頻信號6之頻率有 不同的要求，一切最佳化過程都依照數位信號5、射頻 信號6最後在接收端之後的電氣訊號為依據。 綜上所述’本發明混合乙太網路與射頻訊號之單一 波長光纖通信系統可有效改善習用之種種缺點，可使用 目丽已存在的射頻與乙太網路標準系統，將兩者射頻和 • 數位的特性結合在單一波長的光纖傳輸系統中，促使乙 太網路與射頻系統的骨幹簡便化，以不大幅更動現有傳 輸没備下，使通道容量加大，有利於系統業者提供多項 性的服務，進而使本發明之産生能更進步、更實用、更 符合使用者之所須，確已符合發明專利申請之要件，爰 依法提出專利申請。 惟以上所述者，僅為本發明之較佳實施例而已，當 不能以此限定本發明實施之範圍；故，凡依本發明申請 »專利範圍及發明說明書内容所作之簡單的等效變化與: 飾，皆應仍屬本發明專利涵蓋之範圍内。 14 1264901 【圖式簡單說明】 !:圖，係本發明之系統架構示意圖。 弟圖係本發明之光電轉換接收器示意圖。 弟圖’係本發明之直調之數位光信號之光譜示意圖 ^ (進入馬克干赫調變器之前）。The signal transmitted on the RF signal 6 has different requirements for the signal-to-noise ratio with respect to the digital signal 5 according to different modulation methods, and the digital signal directly modulated by the digital signal also has different standards (such as SONET 〇Cn, SHD). 13 8 1264901 STM-m,n,m = 1, 2, 3,...etc) have different signal modes (NZ, NRZ, etc.), which have different requirements on the power intensity of the two signals and the frequency of the RF signal 6. All optimization processes are based on the electrical signals of the digital signal 5 and the RF signal 6 after the receiving end. In summary, the single wavelength optical fiber communication system of the hybrid Ethernet and radio frequency signals of the present invention can effectively improve various disadvantages of the conventional use, and can use the existing RF and Ethernet standard systems to transmit both radio frequency and • The digital features are combined in a single-wavelength fiber-optic transmission system, which facilitates the backbone of the Ethernet and RF systems, so that the existing transmissions are not significantly changed, and the channel capacity is increased, which is beneficial to the system provider. The service, in turn, makes the invention more progressive, more practical, and more in line with the needs of the user. It has indeed met the requirements of the invention patent application, and has filed a patent application according to law. However, the above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto; therefore, the simple equivalent changes made in accordance with the scope of the invention and the contents of the invention description of the present invention are : Decorations are still covered by the patents of this invention. 14 1264901 [Simple description of the diagram] !: The diagram is a schematic diagram of the system architecture of the present invention. The figure is a schematic diagram of the photoelectric conversion receiver of the present invention. The figure is a schematic diagram of the spectrum of the direct-modulated digital light signal of the present invention ^ (before entering the Markanger modulator).
第4圖’係本發明之射頻信號頻譜示意圖（驅動馬克干 赫調變器之前）。 第5圖▲係本，明經二次調變含數位、射頻兩信號之光 一 譜不意圖（馬克干赫調變器輸出端）。 =6圖，係本發明經光電轉換接受器之電頻譜示意圖。 弟7圖，係本發明馬克干咖㈣的元件触 曲線圖。 第8圖，係本發明馬克干赫的光、電兩個不同輸入 頻譜示意圖。 W 之 【主要元件符號說明】 光乙太網路訊號模組1 光源訊號單元11 第一光纖12 混合訊號模組2 馬克干赫光電調變器2 1 電氣射頻訊號單元2 2 傳遞模組3 ⑧ 15 1264901 第二光纖3 1 接收模組4 光電轉換接收器4 1 光二極體4 1 1 放大器4 1 2 功率分歧器4 1 3 低通濾波器4 1 4 帶通濾波器4 1 5 數位應用端4 2 射頻應用端4 3 數位信號5 射頻信號6Figure 4 is a schematic diagram of the frequency spectrum of the radio frequency signal of the present invention (before driving the Markanghe modulator). Figure 5 ▲ is the system, the second time of the Ming dynasty, the light containing the digital and RF signals is not intended (the output of the Markanghe modulator). Figure 6 is a schematic diagram of the electrical spectrum of the photoelectric conversion receiver of the present invention. Figure 7 is a diagram of the component touch curve of the Mark Dry Coffee (4) of the present invention. Figure 8 is a schematic diagram showing two different input spectra of the light and electricity of the Mark Ganhe of the present invention. W [Main component symbol description] Optical Ethernet signal module 1 Light source signal unit 11 First optical fiber 12 Mixed signal module 2 Mark Ganhe photoelectric modulator 2 1 Electrical RF signal unit 2 2 Transfer module 3 8 15 1264901 Second fiber 3 1 Receiver module 4 Photoelectric conversion receiver 4 1 Light diode 4 1 1 Amplifier 4 1 2 Power splitter 4 1 3 Low pass filter 4 1 4 Band pass filter 4 1 5 Digital application 4 2 RF application 4 3 digital signal 5 RF signal 6
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