Ultra High Precision MZM modulator Bias Controller Automatic Bias Controller
Mbali
• Kulamulira mphamvu yamagetsi molakwika pa Peak/Null/Q+/Q−
• Kulamulira mphamvu yamagetsi mopanda tsankho pamalo osayenera
• Kulamulira kolondola kwambiri: 50dB maximum extinction ratio pa Null mode;
Kulondola kwa ±0.5◦ pa Q+ ndi Q− modes
• Kuchuluka kochepa kwa diter:
0.1% Vπ pa NULL mode ndi PEAK mode
2% Vπ pa Q+ mode ndi Q− mode
• Kukhazikika kwakukulu: ndi kugwiritsa ntchito digito kwathunthu
• Mbiri yochepa: 40mm(W) × 30mm(D) × 10mm(H)
• Yosavuta kugwiritsa ntchito: Kugwiritsa ntchito ndi manja ndi jumper yaying'ono;
Ntchito zosinthika za OEM kudzera mu MCU UART2
• Njira ziwiri zosiyana zoperekera mphamvu ya bias: a. Kulamulira bias yokha
b. Voltage yodziwika bwino ya bias ya ogwiritsa ntchito
Kugwiritsa ntchito
• LiNbO3 ndi ma modulators ena a MZ
• Digital NRZ, RZ
• Kugwiritsa ntchito ma pulse
• Makina ogawa a Brillouin ndi masensa ena owunikira
• Chotumiza cha CATV
Magwiridwe antchito
Chithunzi 1. Kuchepetsa Katundu
Chithunzi 2. Kupanga kwa Mtima
Chithunzi 3. Mphamvu yayikulu ya Modulator
Chithunzi 4. Mphamvu yocheperako ya Modulator
Chiŵerengero cha kutha kwa Maxim DC
Mu kuyesera uku, palibe zizindikiro za RF zomwe zinagwiritsidwa ntchito pa dongosololi. Pure DC extinciton yayesedwa.
1. Chithunzi 5 chikuwonetsa mphamvu yowunikira ya kutulutsa kwa modulator, pamene modulator ikulamulidwa pa Peak point. Chikuwonetsa 3.71dBm pachithunzichi.
2. Chithunzi 6 chikuwonetsa mphamvu ya kuwala ya kutulutsa kwa modulator, pamene modulator ikulamulidwa pa Null point. Ikuwonetsa -46.73dBm pachithunzichi. Mu kuyesa kwenikweni, mtengo umasiyana pafupifupi -47dBm; ndipo -46.73 ndi mtengo wokhazikika.
3. Chifukwa chake, chiŵerengero cha DC extinction chokhazikika chomwe chinayesedwa ndi 50.4dB.
Zofunikira pa chiŵerengero chachikulu cha kutha kwa zinthu
1. Woyendetsa dongosolo ayenera kukhala ndi chiŵerengero chachikulu cha kutha kwa zinthu. Khalidwe la woyendetsa dongosolo limasankha chiŵerengero chachikulu cha kutha kwa zinthu chomwe chingafikire.
2. Kugawa kwa kuwala kwa modulator kuyenera kusamalidwa. Ma modulator amakhudzidwa ndi kugawa kwa kuwala. Kugawa kwa kuwala koyenera kumatha kupititsa patsogolo kuchuluka kwa kuwala kotayika kuposa 10dB. Mu kuyesa kwa labu, nthawi zambiri chowongolera kuwala kwa kuwala chimafunika.
3. Olamulira olondola a bias. Mu kuyesa kwathu kwa DC extinction ratio, 50.4dB extinction ratio yapezeka. Ngakhale kuti deta ya wopanga ma modulator imalemba 40dB yokha. Chifukwa cha kusinthaku ndikuti ma modulator ena amasuntha mofulumira kwambiri. Olamulira a bias a Rofea R-BC-ANY amasintha magetsi a bias masekondi 1 aliwonse kuti atsimikizire kuti ayankha mwachangu.
Mafotokozedwe
| Chizindikiro | Ochepera | Mtundu | Max | Chigawo | Mikhalidwe |
| Kuwongolera Magwiridwe Antchito | |||||
| Chiŵerengero cha kutha | MER 1 | 50 | dB | ||
| CSO2 | −55 | -65 | -70 | dBc | Kutalika kwa Dither: 2% Vπ |
| Nthawi yokhazikika | 4 | s | Malo otsatira: Null & Peak | ||
| 10 | Malo otsatira: Q+ ndi Q- | ||||
| Zamagetsi | |||||
| Mphamvu yamagetsi yabwino | +14.5 | +15 | +15.5 | V | |
| Mphamvu yamphamvu yabwino | 20 | 30 | mA | ||
| Mphamvu yamagetsi yoyipa | -15.5 | -15 | -14.5 | V | |
| Mphamvu yoipa yamagetsi | 2 | 4 | mA | ||
| Mphamvu yotulutsa mphamvu | -9.57 | +9.85 | V | ||
| Kulondola kwa voteji yotulutsa | 346 | µV | |||
| Kuchuluka kwa Dither | 999.95 | 1000 | 1000.05 | Hz | Mtundu: 1kHz chizindikiro cha dither |
| Kukula kwa Dither | 0.1%Vπ | V | Malo otsatira: Null & Peak | ||
| 2% Vπ | Malo otsatira: Q+ ndi Q- | ||||
| Kuwala | |||||
| Mphamvu yolowera kuwala3 | -30 | -5 | dBm | ||
| Kulowetsa kutalika kwa mtunda | 780 | 2000 | nm | ||
1. MER imatanthauza Chiŵerengero cha Kutha kwa Modulator. Chiŵerengero cha kutha kwa zinthu chomwe chimapezedwa nthawi zambiri chimakhala chiŵerengero cha kutha kwa modulator chomwe chafotokozedwa mu datasheet ya modulator.
2. CSO imatanthauza dongosolo lachiwiri lophatikizana. Kuti muyese CSO molondola, mtundu wa chizindikiro cha RF, ma modulators ndi olandila uyenera kutsimikiziridwa. Kuphatikiza apo, mawerengedwe a CSO a dongosolo amatha kusiyana akamagwira ntchito pama frequency osiyanasiyana a RF.
3. Dziwani kuti mphamvu yolowera ya kuwala sikugwirizana ndi mphamvu yowunikira pamalo osankhidwa a bias. Imatanthauza mphamvu yayikulu yowunikira yomwe modulator ingatumize kwa wowongolera pamene bias voltage ikuchokera pa −Vπ mpaka +Vπ.
Chiyankhulo cha Ogwiritsa Ntchito
Chithunzi 5. Kusonkhanitsa
| Gulu | Ntchito | Kufotokozera |
| Photodiode 1 | PD: Lumikizani Cathode ya MZM photodiode | Perekani ndemanga za photocurrent |
| GND: Lumikizani Anode ya MZM photodiode | ||
| Mphamvu | Gwero la mphamvu la chowongolera cha bias | V-: imagwirizanitsa electrode yoyipa |
| V+: imagwirizanitsa electrode yabwino | ||
| Pulojekiti yapakati: imagwirizanitsa ma electrode apansi | ||
| Bwezeretsaninso | Ikani jumper ndikuyitulutsa patatha sekondi imodzi | Bwezeretsani chowongolera |
| Sankhani Mawonekedwe | Ikani kapena tulutsani jumper | palibe jumper: Njira yopanda kanthu; yokhala ndi jumper: Njira ya Quad |
| Polar Select2 | Ikani kapena tulutsani jumper | palibe jumper: Polar Yabwino; yokhala ndi jumper: Polar Yoipa |
| Voltage Yokondera | Lumikizani ndi doko lamagetsi la MZM bias | OUT ndi GND zimapereka ma voltages a bias a modulator |
| LED | Nthawi zonse pa | Kugwira ntchito pansi pa bata |
| Kuzimitsa kapena kuzimitsa masekondi 0.2 aliwonse | Kukonza deta ndi kusaka malo owongolera | |
| Kuzimitsa kapena kuzimitsa nthawi iliyonse 1s | Mphamvu yolowera kuwala ndi yofooka kwambiri | |
| Kuzimitsa kapena kuzimitsa nthawi iliyonse ya masekondi atatu | Mphamvu yolowera kuwala ndi yamphamvu kwambiri | |
| UART | Gwiritsani ntchito chowongolera kudzera mu UART | 3.3: voteji yoyerekeza ya 3.3V |
| GND: Pansi | ||
| RX: Kulandira kwa wolamulira | ||
| TX: Kutumiza kwa chowongolera | ||
| Sankhani Mwadongosolo | Ikani kapena tulutsani jumper | palibe jumper: jumper control;ndi jumper:UART control |
1. Ma modulators ena a MZ ali ndi ma photodiode amkati. Kukhazikitsa kwa owongolera kuyenera kusankhidwa pakati pa kugwiritsa ntchito photodiode ya wowongolera kapena kugwiritsa ntchito photodiode yamkati ya modulator. Ndikofunikira kugwiritsa ntchito photodiode ya wowongolera pakuyesera kwa Lab pazifukwa ziwiri. Choyamba, photodiode ya wowongolera yatsimikizira kuti ndi yabwino. Kachiwiri, ndikosavuta kusintha mphamvu ya kuwala kolowera. Dziwani: Ngati mukugwiritsa ntchito photodiode yamkati ya modulator, chonde onetsetsani kuti mphamvu yotulutsa ya photodiode ikugwirizana ndi mphamvu yolowera.
2. Pini ya polar imagwiritsidwa ntchito kusintha malo olamulira pakati pa Peak ndi Null mu Null control mode (yomwe imatsimikiziridwa ndi Mode Select pin) kapena Quad+
ndi Quad-in Quad control mode. Ngati jumper ya polar pin sinayikidwe, control point idzakhala Null mu Null mode kapena Quad+ mu Quad mode. Kukula kwa RF system kudzakhudzanso control point. Ngati palibe RF signal kapena RF signal amplitude ndi yaying'ono, controller imatha kutseka work point kuti ifike pamalo oyenera monga momwe yasankhidwira ndi MS ndi PLR jumper. Pamene RF signal amplitude idutsa malire enaake, polar ya system idzasinthidwa, pamenepa, PLR header iyenera kukhala mosiyana, mwachitsanzo jumper iyenera kuyikidwa ngati siili kapena kutulutsidwa ngati yayikidwa.
Ntchito Yachizolowezi
Chowongoleracho n'chosavuta kugwiritsa ntchito.
Gawo 1. Lumikizani doko la 1% la cholumikizira ku photodiode ya chowongolera.
Gawo 2. Lumikizani mphamvu yamagetsi ya bias ya chowongolera (kudzera mu SMA kapena mutu wa 2.54mm 2-pin) ku bias port ya modulator.
Gawo 3. Perekani chowongolera ndi ma voltage a +15V ndi -15V DC.
Gawo 4. Yambitsaninso chowongolera ndipo chidzayamba kugwira ntchito.
ZINDIKIRANI. Onetsetsani kuti chizindikiro cha RF cha dongosolo lonse chayatsidwa musanayikenso chowongolera.
Rofea Optoelectronics imapereka mzere wazinthu zama modulators amalonda a Electro-optic, Phase modulators, Intensity modulator, Photodetectors, Laser light sources, DFB lasers, Optical amplifiers, EDFA, SLD laser, QPSK modulation, Pulse laser, Light detector, Balanced photodetector, Laser driver, Fiber optic amplifier, Optical power meter, Broadband laser, Tunable laser, Optical detector, Laser diode driver, Fiber amplifier. Timaperekanso ma modulators ambiri apadera kuti tisinthe, monga 1*4 array phase modulators, ultra-low Vpi, ndi ultra-high extinction ratio modulators, makamaka omwe amagwiritsidwa ntchito m'mayunivesite ndi m'masukulu.
Tikukhulupirira kuti zinthu zathu zidzakuthandizani komanso kufufuza kwanu.
