Nheyo yekushanda ye optical module

Sechikamu chakakosha che optical fiber communication, optical modules maoptoelectronic madivayiri anoona mashandiro ephotoelectric conversion uye electro-optical conversion mukufambiswa kweoptical signal transmission.
Iyo optical module inoshanda pachikamu chemuviri cheiyo OSI modhi uye chimwe chezvinhu zvakakosha mu optical fiber communication system.Iyo inonyanya kuumbwa neye optoelectronic zvishandiso (optical transmitters, optical receivers), anoshanda maseketi, uye optical interfaces.Basa rayo guru nderekuona iyo photoelectric kutendeuka uye electro-optical kushandura mabasa mune optical fiber kutaurirana.Nheyo yekushanda ye optical module inoratidzwa mune yekushanda musimboti dhiyagiramu ye optical module.

Iyo yekutumira inopinza inopinza chiratidzo chemagetsi neimwe kodhi chiyero, uye mushure mekugadziriswa nemukati mutyairi chip, iyo modulated optical chiratidzo cheyero inoenderana inoburitswa nekutyaira semiconductor laser (LD) kana light-emitting diode (LED).Mushure mekutapurirwa kuburikidza nefiber optical, iyo inogamuchirwa inotumira chiratidzo che optical Inoshandurwa kuva chiratidzo chemagetsi ne photodetector diode, uye chiratidzo chemagetsi chekodhi yekodhi inofananidzwa inobuda mushure mokupfuura kuburikidza nepreamplifier.
Ndeapi akakosha ekuita zviratidzo zveiyo optical module
Nzira yekuyera sei indekisi yekuita yeiyo optical module?Tinogona kunzwisisa zviratidzo zvekushanda zve optical modules kubva pane zvinotevera.
Transmitter ye optical module
Avhareji yekufambisa magetsi emagetsi
Avhareji inofambiswa optical simba inoreva simba remagetsi rinobuda nechiedza chechiedza pamagumo ekutumira optical module pasi pemamiriro ekushanda akajairika, anogona kunzwisiswa sekusimba kwechiedza.Simba rekuona rinofambiswa rine hukama nechikamu che "1" muchiratidzo che data.Iyo yakawanda "1", iyo yakakura simba rekuona.Kana iyo transmitter ikatumira pseudo-random kutevedzana siginecha, "1" uye "0" ingangoita account yehafu imwe neimwe.Panguva ino, simba rinowanikwa nebvunzo ndiro avhareji inofambiswa optical simba, uye unit iW kana mW kana dBm.Pakati pavo, W kana mW iyuniti yemutsara, uye dBm iri logarithmic unit.Mukukurukurirana, isu tinowanzo shandisa dBm kumiririra simba rekuona.
Extinction Ratio
The extinction reshiyo inoreva hudiki hunokosha hwereshiyo yeavhareji yesimba remagetsi relaser painoburitsa ese "1" macode kune avhareji magetsi emagetsi anoburitswa apo ese "0" macode anoburitswa pasi pemamiriro akazara emodulation, uye unit iri dB. .Sezvinoratidzwa muMufananidzo 1-3, patinoshandura chiratidzo chemagetsi muchiratidzo chemaziso, laser muchikamu chekutumira che optical module inoshandura iyo kuva chiratidzo chemaziso maererano nekodhi yekodhi yechiratidzo chemagetsi chekuisa.Avhareji yesimba rekuona apo ese "1" macode anomiririra avhareji simba relaser inoburitsa mwenje, avhareji simba rekuona apo ese "0" macode anomiririra avhareji simba relaser risingabudise chiedza, uye kutsakatika kwechiyero kunomiririra kugona. kusiyanisa pakati pe 0 uye 1 masaini, saka Extinction ratio inogona kutorwa seyero yelaser kushanda zvakanaka.Hwawo hudiki hudiki hwereshiyo yekutsakatika hunobva pa8.2dB kusvika pa10dB.
Iyo yepakati yavelength yechiratidzo chemaziso
Mune emission spectrum, wavelength inoenderana nechepakati pechikamu chemutsara chinobatanidza 50℅ maximum amplitude values.Mhando dzakasiyana dzemalaser kana maviri lasers emhando imwechete achave akasiyana epakati wavelengths nekuda kwekuita, kugadzira uye zvimwe zvikonzero.Kunyangwe iyo laser yakafanana inogona kunge iine akasiyana epakati wavelengths pasi pemamiriro akasiyana.Kazhinji, vagadziri vezvishandiso zvemaziso uye optical modules vanopa vashandisi parameter, kureva, iyo yepakati wavelength (yakadai se850nm), uye iyi parameter inowanzo siyana.Parizvino, pane kunyanya matatu epakati marefu eanowanzo shandiswa optical modules: 850nm bhendi, 1310nm bhendi uye 1550nm bhendi.
Sei zvichitsanangurwa mumabhandi matatu aya?Izvi zvine chekuita nekurasikirwa kweiyo optical fiber transmission medium yechiratidzo chemaziso.Kuburikidza nekuenderera mberi nekutsvagisa uye zviedzo, zvinoonekwa kuti iyo fiber kurasikirwa kazhinji inoderera nehurefu hwewavelength.Iko kurasikirwa pa850nm kushoma, uye kurasikirwa pa900 ~ 1300nm kunova kwakakwira;nepo pa1310nm, inova yakaderera, uye kurasikirwa pa1550nm ndiyo yakaderera, uye kurasikirwa pamusoro pe1650nm kunowedzera kuwedzera.Saka 850nm ndiyo inonzi short wavelength hwindo, uye 1310nm uye 1550nm mahwindo marefu ewavelength.
Receiver ye optical module
Overload optical simba
Iyo inozivikanwawo se saturated optical simba, inoreva kune yakanyanya kupinza avhareji simba remagetsi iro rinogashira zvikamu zvinogashira pasi peimwe bit kukanganisa chiyero (BER=10-12) mamiriro eiyo optical module.Iyo unit ndeye dBm.
Zvinofanira kuonekwa kuti photodetector ichaonekwa photocurrent saturation phenomenon pasi pechiedza chakasimba chechiedza.Kana ichi chiitiko chikaitika, detector inoda imwe nguva yenguva yekupora.Panguva ino, kunzwisiswa kwekugamuchira kunoderera, uye chiratidzo chinogamuchirwa chinogona kusanzwisiswa.kukonzera kukanganisa kwekodhi.Kuzvitaura zviri nyore, kana iyo yekupinza yemagetsi simba inodarika iyi yakawandisa optical simba, inogona kukonzera kukanganisa kumidziyo.Panguva yekushandiswa uye kushanda, edza kudzivirira kuratidzwa kwakasimba kwechiedza kudzivirira kudarika yakawandisa yemagetsi optical simba.
Receiver kunzwa
Kugamuchira senitivity kunoreva hushoma avhareji yekupinza simba rekuona iyo iyo inogashira yekupedzisira zvikamu zvinogona kugamuchira pasi pemamiriro eimwe bit kukanganisa mwero (BER=10-12) yeOptical module.Kana iyo transmit optical simba ichireva kusimba kwechiedza pamagumo ekutumira, ipapo iyo yekugamuchira senitivity inoreva kusimba kwechiedza chinogona kuwonekwa neiyo optical module.Iyo unit ndeye dBm.
Muzhinji, iyo yakakwirira chiyero, iyo yakaipisisa yekugamuchira senitivity, ndiko kuti, iyo yakakura iyo shoma yakagamuchirwa optical simba, iyo yakakwirira iyo inodiwa yekugamuchira yekupedzisira zvikamu zve optical module.
Yakagamuchira optical simba
Iyo yakagashirwa optical simba inoreva avhareji optical simba renji iyo inogashira yekupedzisira zvikamu zvinogona kugamuchira pasi pemamiriro eimwe bit kukanganisa mwero (BER=10-12) yeOptical module.Iyo unit ndeye dBm.Muganho wepamusoro weiyo yakagamuchirwa optical simba ndiyo yakawandisa optical simba, uye yakaderera muganho ndiyo yakanyanya kukosha yekugamuchira senitivity.
Kazhinji kutaura, kana simba rekugamuchira rakagamuchirwa rakaderera pane rekunzwa kwekugamuchira, chiratidzo chinogona kusagashirwa kazhinji nekuti simba rekuona harina kusimba.Kana iro simba rekuona rakagamuchirwa rakakura kudarika simba rekuona rakaremerwa, masaini anogona kusagashirwa zvakajairika nekuda kwezvikanganiso zvishoma.
Comprehensive performance index
interface kasi
Iyo yakawanda yemagetsi chiratidzo cheyero yekukanganisa-isina kutapurirana iyo optical michina inogona kutakura, iyo Ethernet chiyero inotsanangura: 125Mbit / s, 1.25Gbit / s, 10.3125Gbit / s, 41.25Gbit / s.
Transmission distance
Iyo yekufambisa kureba ye optical modules inonyanya kuganhurirwa nekurasikirwa uye kupararira.Kurasikirwa ndiko kurasikirwa kwesimba rechiedza nekuda kwekutorwa, kupararira uye kubuda kwepakati kana chiedza chichiendeswa mufiber yemaziso.Ichi chikamu chesimba chinoraswa pane imwe chiyero sezvo kureba kwekufambisa kunowedzera.Kupararira kunonyanya kukonzerwa nenyaya yekuti masaisai emagetsi emhando dzakasiyana-siyana anopararira nekumhanya kwakasiyana mukati mechikamu chimwe chete, zvichikonzera kuti zvikamu zvakasiyana-siyana zvewavelength yechiratidzo chekuona zvichisvika pamagumo ekugamuchira panguva dzakasiyana nekuda kwekuunganidzwa kwemafashama ekufambisa, zvichikonzera kupuruzira. kuwedzera, izvo zvinoita kuti zvisakwanise kusiyanisa kukosha kwezviratidzo.
Panyaya yekupararira kudiki kweiyo optical module, iyo nhambwe yakaganhurwa yakakura kwazvo kupfuura kureba kudiki kwekurasikirwa, saka inogona kuregererwa.Muganho wekurasikirwa unogona kuverengerwa zvinoenderana neformula: kurasikirwa kudiki chinhambwe = (kupfuudzwa optical simba - kugamuchira senitivity) / fiber attenuation.Iyo attenuation ye optical fiber yakabatana zvakanyanya kune chaiyo yakasarudzwa optical fiber.