TWI601393B - A 20-gbps optical lifi transport system - Google Patents
A 20-gbps optical lifi transport system Download PDFInfo
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- TWI601393B TWI601393B TW104131219A TW104131219A TWI601393B TW I601393 B TWI601393 B TW I601393B TW 104131219 A TW104131219 A TW 104131219A TW 104131219 A TW104131219 A TW 104131219A TW I601393 B TWI601393 B TW I601393B
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本發明為光通訊技術領域，而本發明是以可見光一階注入鎖模技術所建構之無線光通訊為主體，並以正交分頻多工方式進行資料調變系統架構。 The invention is in the field of optical communication technology, and the invention is based on wireless optical communication constructed by visible light first-order injection mode-locking technology, and performs data modulation system architecture in orthogonal frequency division multiplexing mode.
無線光通訊目前已經具有良好的光學特性及方便架設，並且克服許多射頻無線通訊的限制，例如：資料量傳輸限制、自由空間距離傳輸限制。可見雷射光通訊為無線光通訊的的一種，可見雷射光通訊在許多方面都優於射頻無線通訊，在實際應用上，高速資料量傳輸為無線光通訊的首要設計考量，垂直共振腔面射型雷射具有線寬窄、光源同調的特性，目前已經發展成為高速資料量傳輸的發射端，在可見光雷射通訊中使用垂直共振腔面射型雷射可以達到更高資料傳輸量、更遠的傳輸距離，再使用一階注入鎖模提升雷射的頻寬，提升系統的傳輸品質。 Wireless optical communication has good optical characteristics and convenient erection, and overcomes many RF wireless communication restrictions, such as data transmission limitation and free space distance transmission limitation. It can be seen that laser optical communication is a kind of wireless optical communication. It can be seen that laser optical communication is superior to RF wireless communication in many aspects. In practical applications, high-speed data transmission is the primary design consideration for wireless optical communication, vertical cavity surface type. The laser has the characteristics of narrow line width and homology of light source. At present, it has developed into a transmitting end for high-speed data transmission. In the visible laser communication, vertical cavity surface-emitting laser can achieve higher data transmission and longer transmission. Distance, then use the first-order injection mode-lock to increase the bandwidth of the laser to improve the transmission quality of the system.
鑑於先前技術所述，本發明的目的在於提供一種可見光一階注入鎖模技術所建構之無線光通訊系統。 In view of the prior art, it is an object of the present invention to provide a wireless optical communication system constructed by a visible light first-order injection mode-locking technique.
為達上述目的，本發明提供一種可見光一階注入鎖模技術所建構之無線光通訊系統，包含：一第一垂直共振腔面射型雷射，作為奴雷 射；一光束分離器，其第一端光耦接於第一垂直共振腔面射型雷射之第三端，使可見光可由第二垂直共振腔面射型雷射注入第一垂直共振腔面射型雷射；一第一凸透鏡，光耦接於第一垂直共振腔面射型雷射之第三端及一光束分離器之第一端之間，收斂可見光轉為平行光；一第二垂直共振腔面射型雷射，光耦接於一光束分離器之第二端，作為主雷射；一第二凸透鏡，光耦接於一光束分離器之第二端及一第二垂直共振腔面射型雷射之間，收斂可見光轉為平行光；一自由空間光隔離器光耦接一光束分離器之第二端及一第二凸透鏡之間，使光只會由第二垂直共振腔面射型雷射注入第一垂直共振腔面射型雷射，產生可見光一階注入鎖模，並由光束分離器之第三端射出；一空間光調變器，光耦接於一光束分離器之第三端，將平行光收斂為一點。 To achieve the above objective, the present invention provides a wireless optical communication system constructed by a visible light first-order injection mode-locking technique, comprising: a first vertical cavity surface-emitting laser as a slave a beam splitter, the first end of the light is coupled to the third end of the first vertical cavity surface-emitting laser, so that the visible light can be injected into the first vertical cavity surface by the second vertical cavity surface-emitting laser a first type of convex lens, the first coupling lens is optically coupled between the third end of the first vertical cavity surface-emitting laser and the first end of a beam splitter, and the visible light is converted into parallel light; a vertical cavity surface-emitting laser, the optical coupling is coupled to the second end of the beam splitter as a main laser; and a second convex lens is coupled to the second end of the beam splitter and a second vertical resonance Between the cavity-type lasers, the visible light is converted into parallel light; a free-space optical isolator is optically coupled between the second end of the beam splitter and a second convex lens, so that the light is only resonated by the second vertical The cavity surface type laser is injected into the first vertical cavity surface type laser to generate a visible light first-order injection mode-locked, and is emitted by the third end of the beam splitter; a spatial light modulator is coupled to the light beam The third end of the separator converges the parallel light to a point.
在本發明的其他實施方式中，可見光一階注入鎖模技術所建構之無線光通訊系統，更可以包含一任意波形產生器，正交振幅調變之正交分頻多工訊號由MATLAB軟體執行調變之程式碼並置入任意波形產生器，任意波形產生器電連接第一垂直共振腔面射型雷射之第二端。 In other embodiments of the present invention, the wireless optical communication system constructed by the visible light first-order injection mode-locking technology may further include an arbitrary waveform generator, and the orthogonal frequency modulation orthogonal frequency division multiplexing signal is executed by the MATLAB software. The modulated code is placed in an arbitrary waveform generator, and the arbitrary waveform generator is electrically connected to the second end of the first vertical cavity surface-emitting laser.
在本發明的其他實施方式中，可見光一階注入鎖模技術所建構之無線光通訊系統，更可以包含一光電檢測器、一低雜訊放大器、一等化器、一通訊訊號分析儀以及一誤碼率分析儀，光檢測器之第二端電連接低雜訊放大器，低雜訊放大器電連接等化器，等化器電連接通訊訊號分析儀，正交振幅調變之正交分頻多工訊號進入通訊訊號分析儀，並由通信信號分析儀擷取資料，再由MATLAB軟體執行分析正交分頻多工訊號之程式，進入誤碼率分析儀來評估的誤碼率性能和相應的星座圖。 In other embodiments of the present invention, the wireless optical communication system constructed by the visible light first-order injection mode-locking technology may further include a photodetector, a low noise amplifier, an equalizer, a communication signal analyzer, and a BER analyzer, the second end of the photodetector is electrically connected to the low noise amplifier, the low noise amplifier is electrically connected to the equalizer, the equalizer is electrically connected to the communication signal analyzer, and the orthogonal frequency modulation is orthogonally frequency-divided. The multiplexed signal enters the communication signal analyzer, and the data is retrieved by the communication signal analyzer, and then the MATLAB software executes the program for analyzing the orthogonal frequency division multiplexing signal, and enters the bit error rate analyzer to evaluate the bit error rate performance and corresponding Constellation map.
在本發明的其他實施方式中，可見光一階注入鎖模技術所建構之無線光通訊系統，更可以包含一網路分析儀，網路分析儀電連接一第一垂直共振腔面射型雷射之第一端以及一光電檢測器之第三端之間，網路分析儀產生一射頻掃描訊號打入第一垂直共振腔面射型雷射之第一端，光電檢測器之第三端電連接網路分析儀，經過光電檢測器接收光以後，再經由網路分析儀來評估使用可見光一階注入鎖模技術所建構之無線光通訊系統以及沒有使用可見光一階注入鎖模技術所建構之無線光通訊系統的頻率響應。 In other embodiments of the present invention, the wireless optical communication system constructed by the visible light first-order injection mode-locking technology may further include a network analyzer electrically connected to a first vertical cavity surface-emitting laser. The first end of the photodetector and the third end of the photodetector generate a radio frequency scanning signal to enter the first end of the first vertical cavity surface type laser, and the third end of the photodetector Connected to the network analyzer, after receiving light through the photodetector, and then through the network analyzer to evaluate the wireless optical communication system constructed by visible-light first-order injection mode-locking technology and constructed without the use of visible light first-order injection mode-locking technology. The frequency response of a wireless optical communication system.
1、6‧‧‧垂直共振腔面射型雷射 1,6‧‧‧Vertical cavity surface-emitting laser
2、5‧‧‧凸透鏡 2, 5‧‧ ‧ convex lens
3‧‧‧光束分離器 3‧‧‧beam splitter
4‧‧‧自由空間光隔離器 4‧‧‧Free space optical isolator
7‧‧‧空間光調變器 7‧‧‧Space light modulator
8‧‧‧可見光一階注入鎖模技術雷射發射機 8‧‧‧ Visible first-order injection mode-locking technology laser transmitter
9‧‧‧光電檢測器 9‧‧‧Photodetector
10‧‧‧產生正交振幅調變之正交分頻多工訊號之程式碼 10‧‧‧ Orthogonal frequency division multiplexing signal generating quadrature amplitude modulation
11‧‧‧任意波形產生器 11‧‧‧ Arbitrary Waveform Generator
12‧‧‧低雜訊放大器 12‧‧‧Low noise amplifier
13‧‧‧等化器 13‧‧‧ Equalizer
14‧‧‧通信信號分析儀 14‧‧‧Communication Signal Analyzer
15‧‧‧分析正交分頻多工訊號之程式 15‧‧‧Analyze the program of orthogonal frequency division multiplexing signal
16‧‧‧誤碼率分析儀 16‧‧‧Bit rate analyzer
17‧‧‧網路分析儀 17‧‧‧Network Analyzer
圖一為可見光一階注入鎖模技術雷射。 Figure 1 shows a visible-light first-order injection-mode-locking technology laser.
圖二為本發明之可見光一階注入鎖模技術所建構之無線光通訊系統之示意圖。 FIG. 2 is a schematic diagram of a wireless optical communication system constructed by the visible light first-order injection mode-locking technology of the present invention.
圖三為未注入與一階注入之光譜比較圖；a為未注入時，b為注入時。 Figure 3 is a comparison of the spectra of the unimplanted and first-order implants; a is the unimplanted, and b is the implanted.
圖四為未注入與一階注入之頻率響應比較圖。 Figure 4 is a comparison of the frequency response of unimplanted and first-order injection.
圖五為未注入與一階注入之電頻譜比較圖；a為未注入時，b為注入時。 Figure 5 is a comparison of the electrical spectrum of the unimplanted and first-order implants; a is the unimplanted, and b is the implanted.
圖六為未注入與一階注入之誤碼率比較圖。 Figure 6 is a comparison of bit error rate between unimplanted and first order injection.
請參照圖一，為提出的可見光一階注入鎖模技術，為本發明之可見光一階注入鎖模技術雷射發射機8作為發送端之示意圖，其包含二垂直共振腔面射型雷射(vertical cavity surface emitting laser，VCSEL)1及6、二 凸透鏡(convex lens)2及5、一光束分離器(beam splitter)3、一自由空間光隔離器(free-space optical isolator)4、一空間光調變器(spatial light modulator)7。 Please refer to FIG. 1 , which is a schematic diagram of a visible light first-order injection mode-locking technique, which is a schematic diagram of a visible light first-order injection mode-locking laser transmitter 8 as a transmitting end, which comprises two vertical cavity surface-emitting lasers ( Vertical cavity surface emitting laser, VCSEL) 1 and 6, 2 Convex lenses 2 and 5, a beam splitter 3, a free-space optical isolator 4, and a spatial light modulator 7.
請參照圖二，圖二是根據本發明之可見光一階注入鎖模技術所建構之無線光通訊系統。其包含一產生正交振幅調變之正交分頻多工訊號之程式碼(generated offline MATLAB program)10、一任意波形產生器(arbitrary waveform generator)11、一可見光一階注入鎖模技術雷射發射機8、一光電檢測器(photodiode)9、一低雜訊放大器(low noise amplifier)12、一等化器(equalizer)13、一通信信號分析儀(communication signal analyzer)14、一分析正交分頻多工訊號之程式(processed offline MATLAB program)15、一碼誤率分析儀(bit error rate tester，BERT)16、一網路分析儀(network analyzer)17。 Referring to FIG. 2, FIG. 2 is a wireless optical communication system constructed by the visible light first-order injection mode locking technology according to the present invention. The method includes a generated offline MATLAB program 10, an arbitrary waveform generator 11, and a visible light first-order injection mode-locking technology laser. Transmitter 8, a photodiode 9, a low noise amplifier 12, an equalizer 13, a communication signal analyzer 14, an analysis orthogonal A processed offline MATLAB program 15, a bit error rate tester (BERT) 16, and a network analyzer 17.
配合參閱圖一，其繪示出圖二之可見光一階注入鎖模技術所建構之無線光通訊系統，偽隨機二進制序列經過MATLAB軟體執行調變之程式碼產生正交振幅調變之正交分頻多工訊號之程式碼10，並置入任意波形產生器11訊號載在可見光一階注入鎖模技術雷射發射機8經光電檢測器9進入放大器，為了降低放大過程中的雜訊，使用低雜訊放大器12，再用等化器13優化訊號，最後正交振幅調變之正交分頻多工訊號進入通信信號分析儀14，並由通信信號分析儀14擷取資料，再由MATLAB軟體執行分析正交分頻多工訊號之程式15，進入誤碼率分析儀16來評估的誤碼率性能和相應的星座圖。再經由網路分析儀17來評估使用可見光一階注入鎖模技術所建構之無線光通訊系統以及沒有使用可見光一階注入鎖模技術所建構之無線光通訊系統的頻率響應。 Referring to FIG. 1 , the wireless optical communication system constructed by the visible light first-order injection mode-locking technique of FIG. 2 is illustrated, and the pseudo-random binary sequence is subjected to MATLAB software to perform modulation and modulation to generate orthogonal amplitude modulation orthogonal division. The frequency code of the multiplexed signal is 10, and the arbitrary waveform generator 11 is placed in the visible light first-order injection mode-locking technology. The laser transmitter 8 enters the amplifier through the photodetector 9, in order to reduce the noise during the amplification process, The low noise amplifier 12, and then the equalizer 13 optimizes the signal, and finally the orthogonal frequency modulation orthogonal frequency division multiplexing signal enters the communication signal analyzer 14, and the data is extracted by the communication signal analyzer 14, and then by MATLAB. The software executes the program 15 for analyzing the orthogonal frequency division multiplexing signal, and enters the bit error rate analyzer 16 to evaluate the bit error rate performance and the corresponding constellation. The network analyzer 17 is then used to evaluate the frequency response of a wireless optical communication system constructed using visible light first-order injection mode-locking technology and a wireless optical communication system constructed without using visible-light first-order injection mode-locking technology.
1、6‧‧‧垂直共振腔面射型雷射 1,6‧‧‧Vertical cavity surface-emitting laser
2、5‧‧‧凸透鏡 2, 5‧‧ ‧ convex lens
3‧‧‧光束分離器 3‧‧‧beam splitter
4‧‧‧自由空間光隔離器 4‧‧‧Free space optical isolator
7‧‧‧空間光調變器 7‧‧‧Space light modulator
8‧‧‧可見光一階注入鎖模技術雷射發射機 8‧‧‧ Visible first-order injection mode-locking technology laser transmitter
9‧‧‧光電檢測器 9‧‧‧Photodetector
10‧‧‧產生正交振幅調變之正交分頻多工訊號之程式碼 10‧‧‧ Orthogonal frequency division multiplexing signal generating quadrature amplitude modulation
11‧‧‧任意波形產生器 11‧‧‧ Arbitrary Waveform Generator
12‧‧‧低雜訊放大器 12‧‧‧Low noise amplifier
13‧‧‧等化器 13‧‧‧ Equalizer
14‧‧‧通信信號分析儀 14‧‧‧Communication Signal Analyzer
15‧‧‧分析正交分頻多工訊號之程式 15‧‧‧Analyze the program of orthogonal frequency division multiplexing signal
16‧‧‧誤碼率分析儀 16‧‧‧Bit rate analyzer
17‧‧‧網路分析儀 17‧‧‧Network Analyzer
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2722025Y (en) * | 2004-06-01 | 2005-08-31 | 大地光纤股份有限公司 | Illuminator |
| US7542489B2 (en) * | 2005-03-25 | 2009-06-02 | Pavilion Integration Corporation | Injection seeding employing continuous wavelength sweeping for master-slave resonance |
| US7599413B2 (en) * | 2006-05-19 | 2009-10-06 | Pavilion Integration Corp. | Self-contained module for injecting signal into slave laser without any modifications or adaptations to it |
| US20110122912A1 (en) * | 2009-11-20 | 2011-05-26 | Benjamin Seldon D | Optical transmitters for mm-wave rof systems |
| TW201528705A (en) * | 2014-01-07 | 2015-07-16 | Hai-Han Lu | A hybrid CATV/16-QAM-OFDM visible laser light communication system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2722025Y (en) * | 2004-06-01 | 2005-08-31 | 大地光纤股份有限公司 | Illuminator |
| US7542489B2 (en) * | 2005-03-25 | 2009-06-02 | Pavilion Integration Corporation | Injection seeding employing continuous wavelength sweeping for master-slave resonance |
| US7599413B2 (en) * | 2006-05-19 | 2009-10-06 | Pavilion Integration Corp. | Self-contained module for injecting signal into slave laser without any modifications or adaptations to it |
| US20110122912A1 (en) * | 2009-11-20 | 2011-05-26 | Benjamin Seldon D | Optical transmitters for mm-wave rof systems |
| TW201528705A (en) * | 2014-01-07 | 2015-07-16 | Hai-Han Lu | A hybrid CATV/16-QAM-OFDM visible laser light communication system |
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