Kuzadzisa kudiwa kuri kuwedzera kwevanhu kweruzivo, mwero wekutapurirana we optical fiber communication masisitimu uri kuwedzera zuva nezuva. Iyo remangwana optical yekutaurirana network inozosimudzira yakananga kune optical fiber yekutaurirana network ine Ultra-yakanyanya kumhanya, yakanyanya-yakakura kugona, kure-kureba kure, uye yakanyanya-yakakwirira spectrum kunyatsoita. A transmitter yakakosha. Iyo yepamusoro-yekumhanya-yepamusoro-yekumhanyisa chiratidzo inotapura inonyanya kuumbwa nelaser iyo inogadzira inotakura inotakura, modulating yemagetsi chiratidzo chekugadzira mudziyo, uye yakakwira-kumhanya electro-optical modulator inogadzirisa iyo inotakura inotakura. Kuenzaniswa nemamwe marudzi ekunze modulators, lithium niobate electro-optical modulators ine zvakanakira zvehupamhi hwekushandisa frequency, kugadzikana kwakanaka, kuparara kwereshiyo, kugadzikana kwekushanda kwekushanda, yakakwirira modulation rate, diki chirp, nyore kubatanidza, yakakura kugadzira tekinoroji, nezvimwe. inoshandiswa zvakanyanya mukukurumidza-kumhanya, hukuru-hukuru, uye kure-kure-kure optical transmission systems.
Iyo hafu-wave voltage ndiyo inonyanya kukosha yemuviri parameter ye electro-optic modulator. Inomiririra kushanduka kweiyo bias voltage inoenderana nekubuda kwechiedza che electro-optic modulator kubva padiki kusvika pakakwirira. Iyo inosarudza iyo electro-optic modulator kusvika pamwero mukuru. Maitiro ekuyera nemazvo uye nekukasira kuyera hafu-wave voltage ye electro-optic modulator yakakosha zvikuru pakugadzirisa mashandiro echishandiso uye nekuvandudza kugona kwemudziyo. Iyo hafu-wave voltage ye electro-optic modulator inosanganisira DC (hafu-wave
voltage uye radiofrequency) hafu-wave voltage. Basa rekufambisa re electro-optic modulator rakaita seizvi:
Pakati pavo pane kubuda kwemagetsi emagetsi e electro-optic modulator;
Iyo yekuisa Optical simba re modulator;
Iko kurasikirwa kwekuisa kwe electro-optic modulator;
Nzira dziripo dzekuyera hafu-wave voltage dzinosanganisira yakanyanyisa kukosha kugadzirwa uye frequency kaviri nzira, iyo inogona kuyera yakananga ikozvino (DC) hafu-wave voltage uye radio frequency (RF) hafu-wave voltage yemodulator, zvichiteerana.
Tafura 1 Kuenzanisa kweviri hafu-wave voltage bvunzo nzira
| Yakanyanya kukosha nzira | Frequency kaviri nzira | |
| Zvishandiso zverabhoritari | Laser simba rekupa Kusimba modulator pasi pekuedzwa Inogadziriswa DC magetsi emagetsi ± 15V Optical simba mita | Laser light source Kusimba modulator pasi pekuedzwa Inogadziriswa DC magetsi emagetsi Oscilloscope signal source (DC Bias) |
| nguva yekuedza | 20min() | 5min |
| Experimental zvakanakira | nyore kuita | Muedzo wakarurama Inogona kuwana DC hafu-wave voltage uye RF hafu-wave voltage panguva imwe chete |
| Kukanganisa pakuedza | Nguva yakareba uye zvimwe zvinhu, bvunzo haina chokwadi Yakananga mutyairi bvunzo DC hafu-wave voltage | Nguva yakati rebei Zvinhu zvakaita senge hombe waveform kukanganisa kutonga kukanganisa, nezvimwewo, bvunzo haina chokwadi |
Inoshanda sezvinotevera:
(1) Kunyanya kukosha nzira
Iyo yakanyanyisa kukosha nzira inoshandiswa kuyera iyo DC hafu-wave voltage ye electro-optic modulator. Chekutanga, pasina chiratidzo chemodulation, iyo yekuchinjisa basa curve ye electro-optic modulator inowanikwa nekuyera iyo DC bias voltage uye inobuda chiedza kusimba shanduko, uye kubva kune yekufambisa basa curve Sarudza iyo yakanyanya kukosha poindi uye shoma kukosha poindi, uye tora inoenderana DC voltage kukosha Vmax uye Vmin zvichiteerana. Chekupedzisira, mutsauko uripo pakati peaya maviri voltage values ndiyo hafu-wave voltage Vπ=Vmax-Vmin ye electro-optic modulator.
(2) Frequency kupeta nzira
Yaive ichishandisa frequency yakapetwa kaviri nzira kuyera iyo RF hafu-wave voltage ye electro-optic modulator. Wedzera iyo DC bias komputa uye AC modulation siginecha kune electro-optic modulator panguva imwe chete kuti ugadzirise DC voltage kana kubuda kwemwenje intensity yachinjirwa kune yakanyanya kana kushoma kukosha. Panguva imwecheteyo, uye inogona kucherechedzwa pane mbiri-trace oscilloscope kuti inobuda modulated chiratidzo ichaonekwa frequency yakapetwa kaviri kukanganisa. Musiyano wega weiyo DC voltage inoenderana neaviri ari padyo frequency yakapetwa kaviri kukanganisa ndeye RF hafu-wave voltage ye electro-optic modulator.
Pfupiso: Yese nzira yekukosha yakanyanyisa uye nzira yekupeta kaviri inogona kuyera hafu-wave voltage ye electro-optic modulator, asi kuenzanisa, iyo ine simba nzira yekukosha inoda nguva yakareba yekuyera, uye iyo yakareba yekuyera nguva ichave nekuda Iyo inobuda optical simba re laser inoshanduka uye inokonzera kuyerwa kukanganisa. Iyo yakanyanyisa kukosha nzira inoda kuongorora iyo DC bias ine diki nhanho kukosha uye kurekodha iyo inobuda optical simba re modulator panguva imwe chete kuti uwane yakanyatsojeka DC hafu-wave voltage kukosha.
Iyo frequency kuita kaviri nzira inzira yekuona iyo hafu-wave voltage nekutarisa frequency yakapetwa kaviri waveform. Kana iyo yakashandiswa bias voltage inosvika pane imwe kukosha, frequency kuwanda kukanganisa kunoitika, uye waveform kukanganisa hakuonekwe zvakanyanya. Hazvisi nyore kuona nemaziso. Nenzira iyi, zvinozokonzeresa zvikanganiso zvakanyanya, uye zvazvinoyera ndeye RF hafu-wave voltage ye electro-optic modulator.