TW200803204A - A method of and apparatus for combining electrical signals - Google Patents

Abstract

A method of combining a plurality of electrical signals for transmission over an optical network, said method comprising: (a) each of a plurality of light emitters receiving a respective input electrical signal at a different respective centre frequency and emitting a respective light signal in response thereto and indicative thereof, wherein each light emitter emits the respective light signal at a different respective wavelength; and (b) a photoreceptor receiving the light signals and emitting an output electrical signal in response thereto and indicative thereof.

Description

200803204 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a method of combining a plurality of electrical signals transmitted on a fiber optic network. The invention also relates to a generalizing device. The invention also relates to a system for transmitting signals. Embodiments of the present invention are directed to a passive optical network (PNO) architecture for disseminating communication signals to a plurality of terminal and end user premises. # [Prior Art] The passive optical network (pQN) that extends the fiber-optic cable to the customer end has recently received increasing attention. It is sometimes referred to as "fibre t〇 the home", "fiber t to the kerb", or, fibre to the building architecture. These passive optical network architectures utilize time division multiplexing (TDM) and wavelength division multiplexing (WDM).

Technologies such as (SCM; sub-carrier multiplexing) and hybrid WDM/TDM ® mechanisms are already operational. Among these architectures, many of the examples operate using TDMA (time division multiple access) technology, which typically allows many users to share a specific bandwidth of 1 〇 Gb/s (1 billion bits per second). , ie giga_bits per second) fiber channel. This type of solution relies on the high-bandwidth component of the client device and involves hierarchical classification of the client to establish signal transmission delays and signal uplink scheduling to avoid simultaneous transmission of multiple users on the same fiber channel. Interference between each other. 5 200803204 Passive fiber-optic network is a single point to multi-point woven mother 1 π ^ Α 』 wood structure. Passive fiber and chipping can contain fiber to the terminal, which is the combination of Putian X and 峪 峪. In such networks, the optical splitters are used to service multiple final lines via a single fiber. Among some systems, a single fiber can serve 32 terminals. Pull j, μ, σ passive optical network in the service room of the service library (C on al office, or Nai Duan)

Pt llneterminal; 0LT), and contains multiple optical network early units (0Ptical netw〇rk units) near the user end. The advantage of a passive fiber optic network is that it requires a smaller number of fibers than a point-to-point architecture. In some systems, the 'downlink signal (dGwnlinksignals, meaning the signal from the terminal to the K-end user equipment) is broadcast to each of the same downlink channel, the s-end user equipment. The downlink and uplink signals...plink signals, meaning signals from the end user equipment to the equipment room, can be processed to prevent eavesdropping. In some systems, the uplink signal is combined using a multiplex access protocol, which is typically tdma. One of the problems with TDMA is that network devices must provide time slot slots to end user equipment to allow uplink communications. Several passive optical network standards have been developed · ITU-T g.983; ITU-T G.984; and IEEE 802.3ah. ITU_T G 983 is developed by the International Telecommunications Union and includes AP〇N (asynchronous transfer mode (ATM) PON,

Asynchronous transmission mode passive optical network) and BP〇N (broadbaiid PON 'wideband passive optical network). ITU_T G 984 is also known as GPON (gigabit PON, Gigabit passive optical network). IEEE 6 200803204 802.3ah is also known as EPON (Ethernet PON, Ethernet passive optical network). Existing passive fiber optic networks are typically based on wavelength division multiplexing (WDM) technology, using one wavelength for downlink communications and another different wavelength for uplink communications. This allows for a two-way communication transmission using a single fiber. A passive optical network can include a terminal node, which is called an OLT (ie, a fiber-optic office terminal). The passive optical network may further include one or more client nodes, which may be referred to as ONT (optical network terminals). The optical fiber and optical splitter between the OLT and the NTT are called ODN (optical distribution network). The OLT provides an interface between a passive fiber network and a backbone network. The ONT provides a link to any device that the end user wishes to connect to the passive optical network. Services suitable for passive optical network transmission include: plain old telephone service ('POTS); voice over internet protocol (VoIP); data (eg, Ethernet) Road); video; and telemetry. Passive fiber optic networks are a converged network that transports non-specific content. That is, a passive optical network may be used to carry any service. The appropriate components of the service device can be converted and packaged in a single packet format for transmission within a passive fiber optic network.

A passive optical network using TDMA includes a shared network in which the OLT transmits the data stream of the downlink to all ONTs. Every ONT 7 200803204

Read only the packets that are passed to itself. It can use encryption to prevent unauthorized eavesdropping on the under-link communication content. The OLT also communicates with each ’NT to allocate the uplink bandwidth to each _ node. (10) There is communication content to be transmitted 'OLT assignment-time start point so that 〇Ντ can transmit its packet. Since the bandwidth is not fixed (4) per-(four), it is dynamically equipped with a 'TDMA passive fiber-optic network that allows for statistical multiplex and over-provisioning for both the uplink and downlink link bandwidths. This makes this passive fiber optic network even more advantageous than a point-to-point network in that it not only shares the fiber but also allows a large group of users to share the bandwidth without sacrificing security. One problem with this passive fiber-optic network architecture is the use of TDMA technology in the uplink direction. This allows the client device to require a high bandwidth component. In addition, the use of TDMA in the uplink direction requires hierarchical classification between end user equipment and local passive fabric nodes. In addition, the use of TDMA must also schedule the uplink data transmission to avoid interference between multiple users caused by simultaneous transmission of the same fiber channel. The use of TDMA technology in passive fiber optic networks also requires the presence of fairly complex processing equipment in this passive fiber optic network. Subcarrier multiplex technology overcomes these problems by allocating a portion of the bandwidth of the uplink communication to an end user without limiting the time domain. Subcarrier multiplexing can be used in passive fiber optic networks to increase the efficiency of fiber bandwidth usage. Subcarrier multiplex (hereinafter referred to as SCM) is a mechanism in which multiple signals are multiplexed in a radio frequency (hereinafter referred to as RF) range and transmitted by a single wavelength in the fiber. Passive Optical Network 8 200803204 Learn the maturity of components, solid microwave stability and frequency selection The advantage of using SCM is that microwave components are more versatile than optical components with the same function. Typically, a passive fiber optic network is configured with a passive splitter in the downlink direction to spread a plurality of signals to each 'end user equipment. A certain split splitter can servo up to 32 sets of end user devices. Multiple

The dynamic splitter is connected to a high-density wavelength-multiplexed wavelength division multiplexing, DWDM) #^器/解 multiplexer' I, which in turn is connected to the terminal. A passive optical splitter on the downlink channel is connected to each end user device via an optical fiber. The advantage of using SCM for the uplink communication channel is that it is easier, less costly, and more efficient to process the microwave range signals. However, when the end user equipments are separated from one another by a distance and are commonly connected via fiber optic to the % of the active knife m, the technique used in the uplink communication channel is: problematic. In general, the use of SCM t in the transmission path is quite complicated and inefficient communication channels, so that the signal can be subjected to subcarrier multiplexing operation in a collector (c〇ncentrator) placed beside the passive beam splitter. This set of information may require sensitive microwave receiving devices to receive microwave signals transmitted over short-range RF connections or specially laid coaxial cables, and requires additional communication, such as microwave combining devices and optical modulation devices, to modulate suitable backhaul. Shouted to the heart of the computer room. This system lacks transparency and is less economical in terms of hardware and signal impairment. One of the objects of the present invention is to address this problem. SUMMARY OF THE INVENTION 9 200803204 In accordance with a first feature of the present invention, a method of combining a plurality of electrical signals transmitted over a fiber optic network is provided, the method comprising: a) each of a plurality of light emitters (light) Emitte〇 respectively receives a wheeled electrical signal of a different center frequency and respectively emits an optical signal to react and indicate the reception of the aforementioned input electrical signal, wherein each of the aforementioned light emitters respectively emits the optical signal at a different wavelength; and b - a photoreceptor receives the optical signal as described above and transmits an output electrical signal to react and indicate receipt of the optical signal. At least one of the aforementioned input electrical signals can be generated from a baseband signal. A suitable electrical signal can be generated from a fundamental frequency apostrophe generated by mixing the output of the baseband signal and a local oscillator oscillator. The aforementioned local oscillator preferably operates in the radio frequency range. At least one of the aforementioned input electrical signals may be a signal originating from a wireless access point (or wireless base station, wireless bridge, or AP for short), such as a wireless access point connected to a personal computer. At least one of the aforementioned input electrical signals may be compatible with the IEEe 802.1 1 standard - at least one of the input electrical signals may be derived from a cellular telephone telecommunication base station ° at least one of the foregoing The input electrical signal may be derived from a cellular telephone telecommunication pico station. o The bandwidth of the optical receiver may be such that each of the foregoing optical signals is located in the band 10 200803204 (in-band). And/or causing the beat frequency (or beat frequency) of the optical signal to be out of band (〇ut_〇f-band) relative to the bandwidth. Alternatively, or both, the aforementioned light emitters may be such that the aforementioned light system is within the frequency band and/or such that the wave frequency is out of band with respect to the bandwidth of the light receiver. A fiher can be used to substantially prevent the aforementioned wave difference frequency of the aforementioned optical signal from being detected by the aforementioned optical receiver. The aforementioned output electrical signal output by the optical receiver can be input to a transmission light emitter. The transmission light emitter can be a Light Emitting Diode (LED). This transmitted light emission can be a transmission laser (transmissi〇I1 iaser). This transmitted laser can emit light to a fiber. The above-mentioned transmission light emitter may be a low-degree-of-the-earth wavelength division multiplexing (CWDM) laser. This laser can be uncooled. The aforementioned transmission laser can be a high density wavelength division multiplexed laser. The foregoing output electrical signal can be used to drive a modulator, which adds the output electrical signal to a continuous wave (CW) wavelength from a distributed source. A receiving optical receiver (receiving) The photoreceptor can receive signals transmitted from the transmitting optical transmitter via the optical fiber. A plurality of receivers can be connected to the output of the aforementioned receiving optical receiver. The light receiver can be a photodiode. The photodiode may be a P-type-Intrinsic-N-type (PiN type) photodiode. At least one of the plurality of receivers described above can generate a baseband signal. A 200803204 base frequency # can be generated by down-converting (d〇wnc〇nverting) the output of one of the output of the receiving optical receiver with the output of a local oscillator. The aforementioned local oscillator preferably operates in the radio frequency range. At least one of the plurality of receivers may be a wireless access point. At least one of the foregoing plurality of receivers may be compatible with one of the IEEE 8〇2.1 1 standards. At least one of the foregoing plurality of receivers may be a mobile telephone telecommunications base station. At least one of the plurality of receivers may be a mobile telephone telecommunications base station. The step of receiving a plurality of baseband signals before the step (a) of the uranium method is performed by each of the end user equipment modules and each of the baseband signals is upconverted into a carrier signal to respectively generate a relative input. The electrical ##' each carrier signal has a different center frequency. The method may be included in each of the plurality of optical signal collectors, each of which receives the optical signal output by a group of end user equipment modules, each of which is combined with the terminal user equipment module The light signals are respectively outputted with a combined optical signal to reflect and indicate the reception of the aforementioned optical signals. The method can be further included in a multiplexer to receive the combined optical signal of each of the details and multiplex it to continue transmission on an optical carrier. According to a second feature of the present invention, a communication device is provided in combination with a plurality of electrical signals transmitted over a fiber optic network, the device having a plurality of light beams and a light receiver, each of the foregoing light emitters being used to separate Connect 12 200803204 to receive an input electrical signal of a different center frequency, and respectively emit an optical signal at a different wavelength to reflect and indicate the reception of the aforementioned input electrical signal; and the aforementioned optical receiver is configured to receive the aforementioned optical signal and transmit An electrical signal is output to react and indicate receipt of the aforementioned optical signal. The communication device can be further implemented to implement the method as described in the first feature above. The various additional features mentioned in the first feature are therefore also present for this second feature.

The device may further comprise a plurality of end user device modules, wherein each module comprises an upconverter (UpC〇nverter) to upconvert a baseband signal back to a relative carrier signal, each carrier signal separately There are different center frequencies to generate an input electrical signal, respectively. Each of the end user δ modules may further include a light emitter, and each of the light emitters may receive an input electrical signal generated as above. Each end user device module can be used to receive radio frequency signals, and each radio frequency signal can be separately input to the optical transmitter. A single, multiple or all of the above described light emitters can be a low density wavelength division multiplexed laser. The light emitter can be an uncooled laser. The device may comprise a plurality of optical signal collectors, each of the optical signal collections II (4) receiving the aforementioned optical letter output by the group terminal user equipment module | the δί1 device is respectively combined with the group terminal device module The light signal, and the rim _, the knife, respectively, combines the light signal to react and indicate the reception of the aforementioned optical signal. A single, a plurality of seven or all of the above optical signal collectors may each include a light diode connected to a phase opposite transmission laser. The transmitted laser can be a high-density sub-knife night-long multiplex transmission laser. 13 200803204: _乂 contains more benefits to receive each of the aforementioned combined lights 1 ' and multiplex it to continue the transmission of the "optical carrier". The multiplexer can be a density-density, wavelength-multiplexed multiplexer. According to the third feature of the present invention, a terminal user equipment module having the above features is proposed. According to a fourth feature of the present invention, a plurality of terminal user equipment modules having the above characteristics are proposed. At least some embodiments of the present invention allow SCM to be implemented in existing passive fiber optics, to reduce costs. At least some embodiments of the present invention use SCM to know a passive fiber optic network that includes an optical fiber coupled to a customer premises equipment. At least some embodiments of the present invention provide for signal-to-electrical-to-optical conversion by a hub. The hub can include a nearly passive (virtually uplink module) that allows a + expensive, non-cooled, low-density, wavelength-multiplexed laser to be used in the customer premises equipment. At least in some implementations In the example, only a single temperature control laser (temper (4) (10) trolled _ 〇 is required, and the return h is called "which means the data transmission from the terminal device of the self-service-group user to the computer terminal. At least some implementations of the present invention. This allows a nearly passive uplink channel to be used as a combination of multiple users' uplink channels into a single-wavelength. This combination of signals allows individual SCM channels to be based on a clear combination of Q__ The combination of i-vertical or effective peer-to-peer network, each of which has a two-way dedicated communication channel to and from the terminal. This vertical point-to-point network is between the aforementioned 200803204 client device and the terminal. There is no need for a fiber optic connection dedicated to a single user. At least some embodiments of the device are nearly passive, meaning that no signal processing takes place in the hub of the hub. Thus, certain embodiments of the present invention allow for the use of extremely inexpensive components in ρ 士 I 柒 。 。 。 。 。 。 。 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些 某些Replacement of RF application communication systems for maintenance, emergency repair, and reconstruction of disaster damage. This Mx example can provide end users with much higher uplink bandwidth than TDMA passive fiber network systems. [Embodiment] The first figure shows a first standby system in which two fundamental frequency signals A and B from an end user (not shown in the figure) are combined and transmitted to the machine room via a single (1) (not Shown in the figure. In this embodiment, ^ transmission line 111 is a standard single-mode fiber of 25 km (singie m〇dexian "', hereinafter referred to as Qing). Fiber-optic transmission line (1) constitutes the height of the machine room Density-wavelength multiplexed back-loading. This system includes a -to-ups-converter having a first mixer 105 and a local oscillator ι〇3, & The frequency of the device 105 is 媳', the conversion state can be produced A. Local oscillating device · 5 GHz signal. The first mixer end is connected to the input end of a first laser diode 107 / wheel is 1560.6 nm light. The first - laser two pole two Only the wavelength pole body 109 can sense the light of the area. _ X , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The device includes a second mixer 丨〇6 and a second local oscillating device 104 connected thereto. The second up-converter receives the fundamental frequency signal B at the input of the second mixer 106. The local oscillator 1〇4 can generate a #6 GHz#. The output of the second mixer 1 is connected to the input of a second laser diode 108, which emits a wavelength of 153 〇.3 nm. Light. The second laser diode also emits light that falls within the sensing area of the photodiode 丨〇9. The photodiode 109 has a bandwidth of 15 GHz. The electrical output of the photodiode 1〇9 is connected to a transmission laser 11〇. Transmission of laser 11 () can emit light with a wavelength of 1566.1 nm. The transmission laser 11 emits light to the optical fiber transmission line 111. The optical fiber transmission line 1 is a single mode optical fiber in this embodiment. A PIN type (P-type, intrinsic, N_type) photodiode 112 is disposed at the receiving end of the optical fiber transmission line 111 to receive a signal transmitted thereon. this? The 1^ type diode has a bandwidth of 15 GHz and can amplify the k number received from the optical fiber transmission line i i i . The output of the PIN diode ii2 is connected to the input terminals of the two local receiving states, and each of the local receivers can obtain the fundamental frequency signals A and B respectively during operation. The first local receiver has a first receiver mixer 11 3 and a first receiver local oscillator 1丨5. The local oscillator 系$ is used to generate the nickname of the same frequency as the first local oscillator 1〇3 of the system user, meaning 2.45 GHz. Therefore, the first receiver mixer 丨13 can output the baseband signal A. Similarly, the second local receiver includes a second receiver mixer 114 that receives signals from a second receiver local oscillator u6. This local oscillator is used to generate a signal of the same frequency as the second local oscillator 1 〇4 16 200803204, which means 6 GHz. Therefore, the second receiver mixer 114 can output the baseband signal b. The operation of the system as shown in the first figure is explained below. Continuing with the first figure, the baseband signals A and B are converted to different RF frequencies using a local oscillator and mixers 1〇3, 1〇5, and 116. Each of the fundamental frequency signals a and B is upconverted to an RF carrier by a tTiple balanced mixer, respectively, to generate a binary phase shift key (binary _ Phase shift keMd, hereinafter referred to as BPSK) Signals, and each has a different carrier frequency. The mother-in-law Lu then inputs the laser diodes 1, 〇 7, 108, respectively, and each of the laser diodes 1 〇 7, 1 〇 8 responds to output light of different wavelengths. Each of the laser diodes 107, 108 independently outputs a fundamental frequency signal modulated into an individual carrier, and the individual carriers are respectively modulated into optical carriers output by the laser diodes 107, 108. As described above, the laser diodes 107 and 108 operate at different wavelengths. The wavelengths of the laser diodes 107 and 108, and the φ bandwidth of the photodiodes 1〇9, are selected such that the light generated by the interaction of light from each of the laser diodes 1 〇7, 1 〇8 The difference frequency cannot be detected by the photodiode 1〇9. Therefore, the 15 GHz bandwidth of the photodiode 109 operates as the same filter, which causes the wave difference frequencies of the laser diodes 107 and 1〇8 to be undetected. The electrical signal output by the photodiode 109 is a sub-carrier modulated (SCM) signal. The center of this SCM signal is at the carrier frequency of 2.45 GHZ and 6 GHz. This composite electrical signal is used to drive a transmission laser 110 operating at 1566.1 nm. The transmission laser 11 is used to transmit a composite power 17 200803204 gas signal including the aforementioned two SCM channels on a 25 km standard single mode fiber 111, which constitutes a DWDM reload to the equipment room end. Therefore, a back-loaded optical signal is transmitted over the single-mode optical fiber (1). This signal is detected by an amplified 15 GHz PIN diode 112 located at the system room end. The electrical signal output by the PIN-type diode Π2 is then separated and converted to a baseband signal generated by each receiver.

The generation of the above two fundamental frequency signals A and B has been subjected to low pass filtering.

The second figure shows a second system which is a generalized version of the system of the first figure. The second system is used to transmit more than two SCM channels on the optical fiber transmission line 21A. A number of fundamental frequency signals A through z are connected to a plurality of upconverts converted to 204. These upconverters are arranged in substantially the same manner as the first system described in connection with the first figure. Therefore, each upconverter 2〇4 includes a local oscillator δι to \, respectively, and each local oscillator operates at a different frequency fi to fn. The upconverter 2〇4 is used to output a plurality of independent subcarrier modulation signals, and the center of each signal is at a different carrier frequency. The output of each upconverter 2〇4 is input to one of the plurality of laser diodes 206, respectively. Each of the laser diodes 2 〇 6 is used to output light at a different wavelength to λη, respectively. The laser diodes 206 are arranged such that each light output is input to a single photodiode 209. The bandwidth of the photodiode 209 is such that the wavelength difference between any wavelength μ to λη is not detected by the photodiode 2〇9. The photodiode 209 can generate a composite electrical signal that includes each subcarrier modulation signal that is considered to drive the transmission laser 21 〇. The transmission laser 210 is connected to the optical fiber transmission line 2u by a suitable transmission path. The fiber optic transmission line 211 is connected to a photodiode 2丨2, 18 200803204, and the photodiode 212 is connected to a beam splitter (not shown) and a plurality of receivers. Each receiver includes a local oscillator and mixer 214 that outputs one of the baseband signals A through Z, respectively. The second system shown in the second figure operates substantially the same as the first system shown in the first figure. In this second system, each of the baseband signals 202 is upconverted to an RF carrier, and the center frequency of each of the RF carriers is unique among the baseband signal groups transmitted via the fiber optic transmission line 21 1 . It is necessary for the receiving device 214 to uniquely identify each received baseband signal based on its frequency. Each of the up-converted baseband signals A to z is input to one of the laser diodes 206, respectively, and the laser diode 206 has a unique wavelength in the laser diode group. Each of the laser diodes 2〇6 then transmits an optical signal to the photodiode 209, respectively. Each of the laser diodes 2〇6 has a unique wavelength to reduce the interference effect between the different light k-numbers projected onto the photodiode 2〇9. The generation of the wave difference frequency is due to the interaction between the light signals emitted by the different laser diodes, but the wavelengths of the laser diodes 206 and the light diodes 2〇9 are deliberately selected to make such wave differences. The frequency is not detected by the photodiode 2〇9: the wave difference frequency of the laser diode is not within the frequency range of the photodiode 209. The resultant electrical signal output from the photodiode 209 is input to the transmitting laser 210. The transmission laser 210 responds to transmit light to the fiber optic transmission line 2ΐ. At the receiving end of the optical fiber transmission line 211, a photodiode 212 is disposed to receive the light transmitted from the optical fiber transmission line 211. The photodiode 212 reproduces an electrical signal that can be separated and downconverted by a plurality of receivers to reproduce a plurality of fundamental frequency signals A through Z, respectively. 19 200803204 The second figure shows a passive optical network downlink channel, which can be used as a downlink channel under any of the systems of the present invention. The equipment room 301 is connected to a high density wavelength division multiplexing (DWDM) demultiplexer 302 via a fiber optic cable. The DWDM demultiplexer 3〇2 is connected to a plurality of optical fibers, and the optical fibers connect the DW plexus 3G2 to a plurality of optical splitters, and each of the optical fibers is connected to the opposite optical splitter. For the sake of convenience of explanation, the third diagram only shows the - splitter 31 其中 therein. This splitter can be regarded as a "passive" splitter' because it does not perform signal processing. The passive splitter 31 is connected to the DWDM demultiplexer 3〇2 and will receive signals from the dwdm demultiplexer 302. The device is distributed to a plurality of user terminal equipment units 32, each unit 320 is connected, and the second is connected by a fiber optic cable. Each user terminal equipment unit 320 includes a light pole 321 and a down converter 322, which are down-converted. The converter 322 includes a -mixer and a local oscillator (both of which are not shown in the figure). The operation of the downlink structure shown in the third figure will be described below. The machine room 3〇1 transmission - high density points Wavelength multiplexed (DWDM) signal to dwdm demultiplexer. Room 3 (ΠDWDM signal contains multiple dwdm channels, each -DWDM channel operates at unique wavelengths. In each same group The signal of the user terminal equipment unit 32 is encoded into a DWDM channel at a specific wavelength in the computer room. The user terminal equipment unit 320 of the same group is connected to the same-passive optical splitter 3ι〇U household terminal device. M 32G is composed. The same - Each user terminal equipment unit 320 in the group is addressed by a relative rf frequency. The DWDM signal includes a wavelength that is intentive (4) 20 200803204. In other words, the DWDM signal includes several DWDM channels, each channel corresponding to each passive splitting In other alternative arrangements, more than one passive optical splitter can receive the same channel from the DWDM demultiplexer 302. However, each user terminal equipment unit 320 must be uniquely addressed and transmitted by a DWDM wavelength. The RF frequency of the SCM signal. The DWDM demultiplexer 302 demultiplexes the DWDM signal received from the equipment room. The DWDM demultiplexer 302 outputs a DWDM channel to each passive optical splitter 3 10. This DWDM channel The signal is identified by a wavelength. The impairment of the signal may necessitate the use of an optical amplifier in the DWDM demultiplexer 302. This optical amplifier may be an erbium doPed fibre ampllfer (EDFA). The passive beam splitter 310 receives a single DWDM. Channel, as previously stated, this DWDM is defined by its wavelength. Passive splitter 3 10 outputs its received DW DM channel to each user terminal device 320. The DWDM channel includes an SCM signal, wherein the signal system of each user terminal device is defined by - RF frequency. In each user terminal device unit 320, the optical diode therein 321 Self-receiving DWDM #道产生—Electrical signal° This electric 1^ #U(4) is input into RF receiver 322 in unit 320, and the local oscillator (not shown) is specific to the specific user terminal equipment unit 320.疋 Frequency is decoded. Therefore, it should be understood that each of the user terminal equipment units 3 20 has an RF receiver dedicated to interpreting the RF frequency of the particular unit 320 from the subcarrier multiplex signal received from the equipment room 301. 21 200803204 In short, each user terminal equipment unit 320 and each other unit within the same-group rent receive the same DWDM channel or wavelength. This channel is output by the passive beam splitter 3H). Each user terminal equipment unit 32 then interprets its corresponding RF frequency. = Figure shows - the uplink channel of the third system, which can be used as the network link channel on the system described in (v). As shown in the fourth figure, the third system includes a plurality of user terminal equipment units (illustrated in the figure - labeled as, day: mother 4 unit 420 contains a device (not shown in the figure) : a frequency ... and a laser diode 421. The mixer 422 is configured to receive a fundamental frequency signal Α to Ζ as Λ η 朴 . U U U U U , , , , , , , , , , , , , , , , , , , , The output of the frequency converter 422 is connected to the output of the laser diode 421. The fundamental frequency signal is upconverted twice early: each of the 420 can be rotated by the optical signal. It is an RF and uses a specific wavelength. Ready $4~本^4 1 0, Received from the user terminal via fiber optic: 2:: All output optical signals. Optical signal collection... Because there is basically no signal processing. Optical 1 port is on the market State 410 is a human-transmitted laser (not shown in the second: a received optical signal and then outputted by the worker 402, the straight door, in the figure) - a signal to a DWDM multi-round laser system - suitable for generating Connected. Optical signal set...1〇传传DWDM帝射., Two in DWDM back to the signal in the machine room operation. In some 7_ Shot - very limited wavelength variation in this third system V: This transmission laser system contains several optical signal collectors, such as 22 200803204 41 0. Similar to optical signal collector 4 1 0, each of the other hubs 4 1 is connected to a group of user equipment units substantially the same as the unit 42 as described above via the fiber optic cable. Each of the hubs also outputs a DWDM channel to each. The DWDM multiplexer 402 is configured to receive the plurality of DWDM channels via the optical fiber. The DWDM multiplexer 402 is connected to the equipment room 401 via an optical fiber. In this embodiment, the length of the optical fiber exceeds 10 The operation of the third system shown in the fourth figure will be explained below. Similar to the downlink transmission channel illustrated in the third figure, in the uplink transmission channel shown in the fourth figure, each user terminal equipment unit 42 The 〇 is uniquely identified by the RF frequency of one of the subcarrier multiplex channels and the wavelength of the DWDM channel transmitted by the optical signal concentrator 410 collocated by the user terminal device. The operation of each user terminal device unit 420 lies in A baseband signal is upconverted, and the upconverted signal is transmitted via a laser diode 42. In this embodiment, the laser diode 421 is a non-cooled low density WDM (CWDM). Laser. Each of the user terminal equipment units 42 each of the two (four) 421 < output is transmitted by optical fiber to the optical signal collector 410. When operating normally, the optical signal organizer 41 is nearly passive because No signal processing is performed in the optical signal collector 41〇, and the optical signal collector is only used for the combination of optical and optical components. Also, since it is necessary to apply power to operate the DWDM transmission laser to generate a Dwdm channel suitable for transmission back to the equipment room via the dwdm multiplex 402, the optical signal concentrator 410 is also nearly passive. Similarly, in short, the uplink channel signal of each user terminal equipment unit 420 in the same 23 200803204 group (that is, connected to the same optical signal collector 41A) is received in a single DWDM in the equipment room. wavelength. Each optical signal collector 41 outputs a DWDM channel at a specific wavelength. The DWDM multiplexer 4 〇 2 operates in conjunction with a plurality of DWDM channels received from each of the optical signal collectors 41 and transmits a signal containing a plurality of wavelengths to the equipment room 4 01 via the optical fiber. The fifth diagram shows a detailed illustration of the optical signal collector 410 of the third system shown in the fourth figure. Referring to the fifth diagram, the optical signal collector 51A includes a photodiode 512 and a transmission laser 514. The optical diode 512 receives an optical signal from each of the user terminal equipment units 52 connected to the optical signal collector 510. Each optical signal contains a signal of a different RF frequency transmitted by light of different wavelengths. Light diode 512 incorporates these signals to produce a composite electrical signal that includes each of the signals from user terminal equipment unit 420 for subcarrier multiplex processing. The composite electrical signal is input to a transmission laser 514. In this embodiment, the transmission laser 5丨4 transmits a composite optical signal via the optical fiber. The optical fiber mentioned in the above embodiments may be a single mode fiber or a multi-mode fiber. The above embodiments have described the transmission of the baseband signal. In other alternative embodiments, at least one of the baseband signals converted to a radio frequency can be replaced with a radio frequency signal. The RF signal can be output from a wireless access gate, such as a wireless local area network (wireless wireless network (10) netw〇rk, WLan) for wireless access points for personal computer access. This RF signal can be output 24 200803204 from a mobile telecom base station. In the above embodiment, the photodiodes 1 〇 9, 2 〇 9 and 512 are used as filters to exclude the wave difference frequency generated by the interaction of light rays of different wavelengths projected into the photodiode. In an alternate embodiment, it includes an additional filter to perform or enhance this function.

It has been mentioned in the above embodiments that the SCM modulation system uses the BPSK modulation format and that in other alternative embodiments of the invention, any tuning format can be used. The modulation format used may include, for example, a binary phase shift key, a quadrature phase shift key (hereinafter referred to as qPSK), or a sixteen phase quadrature amplitude modulation quadrature amplitude modulation. 16 QAM), and /, fourteen-phase quadrature amplitude modulation (Μ qUa (jrature amplitude modulation, below or 64 qam). Similarly, SCM modulation can be used to transmit other RF or wireless standards, such as 3G, IEEE 802.1 1. Another example of a system embodying the invention, which uses qPSK technology and is described by J. Y. Ha, A. Wonfor, RV Penty, I. H. White and P. Ghiggino, Spectrally efficient 10 χ 1 Gb/s QPSK Multi-User Optical Network Architecture", which is incorporated herein by reference in its entirety for this specification. This document describes a dual-channel example using different wavelengths to implement the disclosure as shown in the first figure. Architecture. Another system example implementing the present invention, which uses qAM techniques and is described by J. Y. Ha, A. Wonfor, R. V. Penty, I. H. White, and G. Ghiggino. Write of "mghlySpectralEfficiencyMlllti-User 25 200803204

Optical Network Architecture using IGb/s 16QAM Subcarrier Multiplexing", which is incorporated herein by reference in its entirety. This document describes a dual channel instance using different wavelengths to implement the architecture as disclosed in the first figure. Embodiments of the invention are described above in conjunction with the examples given. It is to be understood that the above-described examples may be varied or modified without departing from the scope of the invention, the scope of which is incorporated by reference. Further examples are given in Appendix I and Appendix II below. Appendix 1 Home and Enterprise Services The dramatic growth in bandwidth demand has led to the proliferation of passive optical networks (PONs), and a series of standards have been developed that allow users to have a bandwidth of 10_100 Mb/s (megabits per second). . Passive fiber-optic network architectures are gaining more and more attention due to the growth of broadband networks and applications requiring large bandwidths such as HDTV (High-Fax Television), which uses low-cost technology to achieve greater user bandwidth (for example, Up to 1 Gb/s). Therefore, benefiting from the advancement of high-speed RF technology, sub-carrier multiplex (SCM) technology has been proposed to replace TDM and CDMA (Code division multiple access) technology in passive optical network applications. Advantages of SCM's advocates include flexible protocol delivery (different channels can be used for different services), looser and more dynamic client accessory specifications, and superior fiber transmission performance. However, it also recognizes significant shortcomings, particularly with regard to optical wavefront interference between uplink information. To solve this problem, we have previously proposed a WDM-SCM multi-user fiber-optic network architecture, which includes a novel uplink link combiner, allowing for easy integration of multiple 2008 SCM channels and multiple users. There is no optical wave difference interference between them. Here, it will show that excellent uplink transmission performance is possible. The feasibility of the 10 X Ι-Gb/s Quadrature Phase Shift Key (QPSK) WDM-SCM multi-user fiber network architecture will be demonstrated here. Here, the bit error rate (hereinafter referred to as BER) generated in the uplink direction of the SCM channel is measured to demonstrate an experimental principle of the uplink function of the system including the two users. prove. It is theoretically valid to use the time domain laser model to confirm the improved spectral efficiency of a single wavelength ten channel case. The sixth diagram shows a schematic diagram of the uplink portion of the proposed network. Multiple SCM channels are generated at each client. It is transmitted through a short fiber link to a "near-passive" uplink combiner, where the optical signals are combined and detected by a wide-band optical detector, followed by a high-density wavelength with an external modulator. A multiplexed (DWDM) laser relays its transmission. Therefore, the above SCM channels are multiplexed to the same WDM wavelength. In order to prove the experimental principle, the two SCM-QPSK channels are transmitted on this network. In order to generate the experimentally required 1 Gb/s QPSK signal, two 500 Mb/s "data" and "non-data" virtual random outputs are output from an Anritsu MP1763C 12.5 GHz waveform generator, which are along different lengths. Cables are independently transmitted to avoid mutual coupling. Each output is treated as an in-phase (I) component and a quadrature (Q) component of the signal, which is upconverted to each orthogonal RF carrier using a wideband triple balanced mixer. They are then overlapped to form a QPSK data signal. The two QPSK channels used in the network are then set to different carrier frequencies. Each QPSK SCM signal 27 200803204 then drives the uplink source at different wavelengths '1515·61 nm and 1563 05 nm. The two optical signals are combined with each other and detected by a 15 GHz wide optical diode. The generated composite electrical signal is used to modulate a third light source operating at 1 562.23 nm, which is used to transmit the generated optical signal containing the two SCM channels on a standard SMf of 25 km as a computer room The DWDM is back. This back-loaded optical signal is detected by the 放大 GHz PIN PIN diode. The electrical signals are then separated and downconverted with each of the original local oscillators. The generated baseband signal is low-pass filtered and detected by an oscilloscope and an error detector (err〇r detect〇. In order to study the scalability of the lOxl-Gb/s QPSK WDM_SCM passive optical network, The quality factor of the down-mixed data (qualhy ctor 'below or Q factor) is taken as a function of the modulation channel spacing or carrier frequency separation and is measured in detail (seventh image). It is found in the subcarrier frequency = 7 GHz. The quality factor of the SCM channel is set as the channel interval increases, and then stabilizes due to the interference between the channels. When the interval between the two SCM channels is i GHz, the quality factor of both the ! and q signals = 9.45 and 9.56 dB respectively. The performance of the uplink part in terms of error rate is measured by the bit error rate of each channel of the uplink from the uplink: evaluated as shown in Figure 8. Left side The second bribe curve shows back to back 〇peration. Each channel has similar sensitivity and 2 error rate difference. The right BER curve shows that it is nearly passive and 25 km. After transmission, indicates D The distance from WDM back to the equipment room is only ldB loss in the BER range of 10-9. It is 28 200803204 to evaluate the possibility of implementing a 10x 1-Gb/S WDM_SCM fiber network based on the time domain laser model. Perform a computer simulation. & Find the first carrier frequency of one of the sCM channels, which will be one of the functions of the secondary carrier frequency. SC = channel is calculated by the quality factor after passing through the uplink combiner, as shown in Figure 9. No. The result shows that when the subcarrier frequency is close to 0, its product

The ^ factor drops drastically. In this simulation, the best 3dB Gaussian chopper frequency is seen in the system 33 GHz. The tenth figure shows the interval in the WDM_SCM optical fiber network proposed by the present invention! 1之 χ 1-Gb/s QpSK SCM transmission feasibility. The subcarrier frequency range is selected from 135 GHz to ι〇·35 GHz. In this example, as the number of channels increases, the quality factor of the worst-case frequency is calculated. The results show that Q fact〇r deteriorates as the number of channels increases. It is mainly due to the side vibration component of the SCM channel caused by the nonlinear increase of the laser. However, even the analog channel has a quality factor of more than 8.6 dB for the worst-performing channel. This result brings the possibility that the total data rate is 1〇_Gb/s and the single user data rate is as high as i Gb/S with the WDM-SCM transmission mechanism. Benjamin proposes a spectrally highly efficient 10 X 1 Gb/s QPSK multi-user fiber network architecture that is based on subcarrier multiplex technology for passive fiber networks. The principle verification of separating the uplink frequency of the 1 GHz RF carrier proves that it has a 1 dB t X rate loss & after 25 km transmission. The results of the suspicion show that each fiber channel is sufficient to support 10 full 1 Gb/s dedicated links and serve 400 users simultaneously when using 4 WDM channels. Appendix II 29 200803204 Home and Enterprise Services The dramatic growth in bandwidth demand has led to the proliferation of passive optical networks (PONs), which have been developed – a series of standards that allow clients to have 10-100 Mb/s (millions per second) The bandwidth of the bit). Benefiting from the advancement of high-speed RF technology, subcarrier multiplex (SCM) technology was proposed to replace time-division multiplex and code-code multiplex access in passive fiber-optic network applications. Although SCM technology has many advantages, its future applications may still be limited to certain SCM modulation spectroscopy spectra. Therefore, SCM high-speed fiber optic networks with excellent spectral efficiency have been attracting attention. The use of SCM < fiber optic networks with spectral efficiency digital modulation mechanisms, such as quadrature phase shift keys (QPSK) and quadrature amplitude modulation (QAM), allows low-speed access to data streams, enabling low-speed, low-cost electronics Component. In order to meet the needs of future high performance passive optical network services, the present invention exemplifies a sub-wavelength multiplexed sub-carrier multiplexed (wdm_scm) multi-user fiber network architecture using an uplink combiner. Remove the wave noise between the light sources. This allows each user to use an individual SCM channel, and each channel's gentleman's 颁 颁 , , , α is combined with the early wavelength of light to return to the machine room. Forty such DWDM wavelengths can be combined with single-fiber, so that more than the (four) (four) households in the single-passive optical network have a connection. We have not demonstrated superior uplink transmission performance, Gb / s QPSK modulation The mechanism 'has limited spectral efficiency. In this example, we completed - 2 χ · i6 _ 2 = the empirical evidence of the optical uplink technology to extend the network performance for the ::South spectral efficiency. It uses the time domain laser model to theoretically verify the improved spectral efficiency of this single honest device, Λ μ long Q channel condition, showing the scalability of this architecture. ^ Figure 11 shows a schematic diagram of the uplink architecture of the proposed network. Each user generates a SCM step. It is transmitted via a short low-density wavelength-multiplexed (CWDM) optical link to a near-passive, uplink-coupler where the optical signal is combined with 'detected by a wide-band photodetector, and then High-density wavelength-multiplexed (DWDM) lasers with external modulators are used for re-transmission. Thereby, the scm channels are reloaded to the machine room via multiplexing processing to be combined to a single wavelength. For the verification of the principle experiment, we illustrate the performance of a single-DWDM uplink architecture with two SCM_1Gb/s 16 QAM channels. First, in order to generate a four-bit quasi-data stream, a 25 〇 Mb/s data channel is attenuated by 6 dB, while the non-data channel is delayed by an integer number of bit times. The two channels are then combined and separated within a 4 GHz impedance splitter/splicer. Where – the output is treated as an in-phase (I) component, and the other is delayed and used as a quadrature (Q) component of the signal, which is then upconverted to each orthogonal rf φ carrier by a mixer and overlapped to form A 16 QAM data signal. The two 16QAM channels used in the network are then set to different carrier frequencies. Each 16qam SCM signal drives the uplink source at different wavelengths, 156 〇 61 nm and i563 〇 5 nm. The two optical signals are combined with each other and detected by a working $ GHz bandwidth photodiode. Generating a composite electrical signal for modulating a third source operating at 1562.23 nm for transmitting the resulting optical signal comprising the two SCM channels over a standard single mode fiber (SMF) of 25 km. As a DWDM back to the machine room. This reloaded optical signal is detected by an amplified 15 GHz PIN diode. The electrical signal is then separated by 31 200803204 and downconverted with each original local oscillator. The generated baseband signal is low-pass filtered and detected by an oscilloscope. To illustrate the 16QAM fiber network, the difference is

The eye diagram of the GHz-human carrier two scM channel, as shown in the twenty-second and thirteenth figures. Each of the I and Q signals of the two SCM channels has a similar quality factor. After a 25 km SMG transmission, the quality factor is slightly reduced due to transmission losses. The quality factor of the upper, middle and bottom eye shapes exceeds 3.7 (~l〇-4BER), which can be better than 1 by VSWR matching and utilization of better RF components (rl5 BER forward error correcting technique) 〇n techniques) to improve. In order to evaluate the possibility of implementing the Q 咖 16 16 16QAM optical network, it is based on a time domain laser model for a computer simulation. This simulation includes the integrated system should have < RF components Performance, rather than the individual components we use for verification; rational display. Figure 14a shows the effect of the channel spacing with the best filtering effect between KM channels. In this calculation (4), - 2.5 GHz SCM channel The EVM measurement is a function of the channel spacing. The single SCM (four) of the interference (10) is called ymbQi _ plus (10), (8) as the filter bandwidth decreases and the resulting interference minimizes the minimum extinguisher bandwidth. In this example, when the channel spacing is in series, the optimal bandwidth chopper bandwidth is Q 1625 gHz. Figure b illustrates the optical network proposed by the present invention, the interval is 〇·5 post : X 1-Gb/s 16QAM S The CM pass can be 〜 得 得 得 得. The subcarrier frequency of the park is selected from 1.0 GHz to ι〇·5 GHz 夕 M L around her. In this case, when the string is added _ s

Channel, with the increase in the number of SCM channels, the number of CMs, calculate the frequency of its worst case 32 200803204

The EVM results of iL show that the EVM deteriorates as the number of channels increases. The main reason is that the modulation index M of the Mach-Zehnder (MZ) modulation in the uplink key combiner is also reduced due to the nonlinear increase of the laser. The nonlinearity of modulation. However, even if the simulated SCM channel reaches 2〇 (Μ=Ό·4), the EVM of the worst-performing channel is still less than 7%. This result shows the possibility of achieving a high spectral efficiency of 2_bits/s/Hz with a total data rate of 2〇_Gb/s with a multi-channel hGb/s 16QAM transmission mechanism. The present invention demonstrates a spectrally efficient 2 χ LGWs 16QAM multi-user uplink killing based on human carrier technology applied to passive optical networks. The results of the simulation show that each fiber channel is sufficient to support 20 X Ι-Gb/s dedicated connections and serve up to 8 users simultaneously when 40 WDM channels are used between the uplink combiner and the equipment room. BRIEF DESCRIPTION OF THE DRAWINGS [Embodiment of the embodiments] A brief description of the drawings, in which: Figure 1 shows a schematic diagram of an uplink key path constituting a specific communication system. The towel-based frequency signal is transmitted via a long-range optical fiber. The transmission line is transmitted from the end user to the terminal. The second figure shows a schematic diagram of an uplink channel constituting a second communication system similar to that shown in the figure, wherein more than one fundamental frequency signal is transmitted via a long-range optical fiber transmission line. The younger brother's picture does not constitute a versatile _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The uplink channel of the third communication system 33 200803204 is intended to be similar to the first and second figures, showing the details of the various component settings of the system. The fifth figure shows the optical signal collection in the fourth system. Further details of the apparatus. An embodiment is further described in Appendix 1, which refers to the following figures, wherein: Figure 6 shows an experimental setup in which λ1:1560 61 nm (nm), λ2: 1563.05 nm, Person 3: 1562.23 nm. The seventh figure shows the correlation between Q factor and channel frequency interval. The eighth figure shows the complex BER measurement. The ninth figure shows the minimum subcarrier frequency of a first SCM channel. A diagram of the relationship between Q fact〇r and the number of channels of the worst channel. An example is given in Appendix 2, which refers to the following figures, where: ', the eleventh figure shows a network proposed by the present invention. Schematic diagram of the uplink of the road. Twelfth and tenth FIG views b show the carrier frequency 25 GHz (gigahertz) the I and Q signals. twelfth twelfth c and e in FIG FIGS minutes

Do not show the secondary load. The wave frequency is 3.5 GHz after the uplink combiner! And Q signal. The eleventh and t-th b-frames show the I and q signals after sub-carrier frequency 2.5 and 25 km (km) SMF transmission, respectively. The thirteenth and fifth th diagrams show the I and Q signals after the subcarrier frequency of 3.5 gHz and 25 km SMF transmission, respectively. 34 200803204 Figure 14a shows the EVM of a 2.5 GHz SCM channel as a function of the Gaussian filter bandwidth. Figure 4b shows the relationship between the number of channels of the worst channel and the number of channels when adding a parallel SCM channel. [Main component symbol description]

3dB tenth EVM

100 first system 101 baseband signal A 102 baseband signal B 1〇3 first local oscillator 104 second local oscillator 105 first mixer 106 second mixer 1〇7 first laser diode 108 second laser diode 109 light diode 110 transmission laser 111 optical fiber transmission line 112 PIN type optical diode 113 first receiver mixer 114 second receiver mixer 115 first receiver local oscillator 116 Second Receiver Local Oscillator 117 Baseband Signal A 118 Baseband Signal B 35 200803204 200 Second System 202 Baseband Signal 204 Upconverter 206 Laser Diode 209 Light Diode 210 Transmission Laser 211 Optical Fiber Transmission Line 212 Photodiode 214 Local Oscillator and Mixer 218 Baseband Signal 301 Room 302 High Density Wavelength Multiplexed (DWDM) Demultiplexer 310 Passive Beam Splitter 320 User Terminal Equipment Unit 321 Optical Diode 322 Downconverter 323 baseband signal 401 room 402 DWDM multiplexer 410 optical signal collector 420 user terminal equipment unit 421 laser diode 422 mixer 423 fundamental frequency signal 36 200803204

510 optical signal collector 512 optical diode 514 transmission laser 520 user terminal equipment unit A-Z fundamental frequency signal δ|-δη local vibration λλ-λη wavelength 37

Claims (1)

200803204 X. Patent application: 1 · A method of combining a plurality of electrical signals transmitted over a fiber optic network, comprising: a) each of the plurality of optical transmitters receiving an input of a different individual center frequency Electrical signals, and respectively transmitting a different optical signal to reflect and indicate receipt of the input electrical signal, wherein each of the optical transmitters respectively transmits the individual optical signals at a different individual wavelength; and b) - the optical receiver (ph〇 Receiving the optical signals and transmitting an electrical signal to reflect and indicate the reception of the optical signals. 2. The method of claim 1, further comprising generating at least one of the input electrical signals from a baseband signal. 3. The method of claim 3, further comprising generating at least one of the input electrical signals from the baseband signal by mixing a baseband signal with an output of a local oscillator. 4. The method of claim 3, wherein the local oscillating device operates in the radio frequency range. The method of any one of claims 1 to 4, wherein the step (b) comprises the optical receiver receiving the optical signal such that, relative to the bandwidth of the optical receiver, each of the The frequency of the optical signal is approximately in the frequency band 'and the beat frequencies of the optical signal are substantially outside the frequency band. 6. The method of any one of claims 1-5, wherein the step (b) comprises filtering the optical signal received by the optical receiver to prevent the wave frequency of the optical signal from being The photodetector detects. 38. The method of any one of claims 1-6, further comprising the optical receiver outputting an electrical signal to a transmission light emitter to indicate receipt by the optical receiver The step of the optical signal. 8. The method of claim 7, further comprising receiving, by the receiving optical receiver, a signal transmitted from the transmitting optical transmitter, and receiving, by the plurality of receivers, the receiving optical receiver from the receiving optical receiver. And outputting, each of the receivers down-converting a selected frequency of the output from the receiving optical receiver to an output of a local oscillator to generate a baseband signal, respectively. The method of any one of claims 1 to 8, wherein the step (a) is performed before the step of receiving a plurality of baseband signals, which are respectively received by each end user equipment module and Each of the fundamental frequency signals is up-converted into a carrier signal to respectively generate a relative input electrical signal, and the mother-carrier signals respectively have different center frequencies. 10 · If the method of claim 9 is included in each of the optical optical concentrators, each of the optical k concentrators is respectively supported by a group of end user equipment modules. The step of receiving the optical signal output 'each of the combiners respectively combines the optical signals with respect to the group of end user equipment modules, and respectively outputs a combined optical signal to reflect and indicate the reception of the optical signal. 11. The method of claim 9 or claim 1 is further included in the *^ multipiexer receiving mother, the combined optical signal, and the multiplex processing of the basin for an optical carrier (optical) Carrier) Continue to transfer step 39 200803204 12. A communication device coupled to a plurality of electrical signals transmitted over a fiber optic network, having a plurality of optical transmitters and an optical receiver, each of the optical transmissions being adapted to receive an input electrical signal at a different center frequency, And respectively emitting an optical signal at a different wavelength to reflect and indicate the reception of the input electrical signal; and the optical receiver is configured to receive the optical signal and transmit an output electrical device to react and indicate the optical signal receive. 13. The communication device of claim 12, wherein the optical receiver and/or the optical transmitter is such that each of the optical transmitters receives the transmitted optical signal relative to a bandwidth of the optical receiver The frequency is substantially within the frequency band, and the frequency difference of the optical signal is substantially outside the frequency band. 14. The communication device of claim 12 or 13 further comprising a filter for substantially preventing a wave difference frequency of the optical signal from being detected by the optical detector. The communication device of any one of claims 12 to 14 further comprising a transmission light emitter configured to receive an output electrical signal from one of the optical receiver outputs. 16. The communication device of claim 15, wherein the transmission light emitter is a Light Emitting Diode (LED) or a transmission laser, such as a low density wavelength division multiplexing (coarse wavelength division multiplexing, CWDM) laser or a density wavelength division multiplexing (DWDM) laser. The device of claim 20, 803,204, further comprising a modulator configured to receive the output electrical signal and to add the output electrical signal to a The continuous wave (CW) wavelength of a distributed source. 18. The communication device of any one of clauses 12 to 17, further comprising a receiving optical receiver configured to receive a signal transmitted from the transmitting optical transmitter and output an electrical signal To indicate the reception of the signal; and further comprising a plurality of receivers connected to the output of the receiving optical receiver, each of the receivers selecting a frequency of the output from the receiving optical receiver and a local oscillator respectively The output is down-converted to produce a baseband signal, respectively. 19. The communication device of claim 18, wherein the local oscillator operates in a radio frequency range. 20. The communication device of claim 18 or claim 19, wherein at least one of the plurality of receivers is a wireless access point, such as a wireless access point compliant with the IEEE 802.11 standard; or wherein the plurality of receivers The mobile telephone telecommunication base station, for example, a cellular telephone telecommunication pico station 〇 21 · the communication device according to any one of claims 12 to 20, further including plural An end user equipment module, wherein each of the end user δ modules further includes an up-converter (^Μηααα) for upconverting the relative baseband signals to a carrier signal, each of the carriers The signals have different center frequencies, respectively, to generate a relative input electrical signal, respectively. 22. The communication device of claim 21, wherein each of the 200803204 supersonic converters respectively includes a mixer and a local oscillator connected thereto, and the fundamental frequency converter is converted by the ocean. The signal is mixed with the output of the local oscillator to generate an input electrical signal relative to the baseband signal, respectively. 13. The communication device of claim 22, wherein the local oscillator operates in a radio frequency range. The communication φ device according to any one of claims 21 to 23, wherein each of the end user device modules further comprises the light emitter, and the homing ray ejector respectively receives the generation The input electrical signal. Each of the end-user device modules of the patent scope 苐2 1 to item 24 is for receiving an RF signal and inputting the RF signal to the relative light emission separately Device. The one or more or all of the light-emitting devices of the communication device of any one of claims 12 to 25 are a low-density partial-wavelength multiplexer (c〇arse wavelength (10) is called 叩, CWDM) laser. 27) The communication of any one of the 12th to 26th patents is set to 匕3 plurality of optical signal collectors, each of the optical signal collectors by the group terminal user equipment The module receives the optical signal output, and each of the transceivers combines a light signal with respect to the optical U ϋ of the group of end user equipment modules to react and indicate the reception of the optical signal. 28. A communication device according to claim 27, wherein one, 42 200803204, the plurality or all of the optical signal collectors respectively comprise a photo diode connected to the opposite transmitting laser. 29. The communication device of claim 28, wherein the transmission laser system is a wavelength wavelength division multiplexing (DWDM) laser. 30. The communication device of any one of clauses 27 to 29, further comprising a multiplexer for receiving each of the combined optical signals and multiplexing the same to continue transmission on an optical carrier . 3 1 . The communication device of claim 30, wherein the multiplex port is a density wavelength division multiplexing (DWDM) multiplexer. The communication device of any one of clauses 12 to 31, wherein at least one of the plurality of input electrical signals is a signal from a wireless access point, such as a wireless connection for connecting to a personal computer. Taking at least one of the input electrical signals conforms to the IEEE 8〇2 u standard; and/or at least one of the input electrical signals is a signal from a mobile telephone telecommunications base station, such as from a mobile telecom base station (cellular teleph〇) Ne telecommunicaticm pico station). 33. An end user equipment module, which is according to any one of items 21 to 32 of the patent application scope. 34. A plurality of end user equipment modules, according to any one of items 21 to 33 of the scope of the patent application. 35. A method substantially as hereinbefore described with reference to the following figures. 43 200803204 36. A device is substantially as described above and/or shown in one or more of the figures, with reference to the following figures. 11. National style: as the next page. 44