Single mode vs Multimode fiber: Kuongorora kwekupedzisira

Single Mode vs Multimode Fiber: Ongororo Yekupedzisira

2025-02-10

Unofanira kunzwisisa musiyano uripo pakati pe single-mode fiber ne multimode fiber. Nhasi, ngatitaurei nezve fiber optics dzinoshandiswa kutumira data se optical signals. Kune mhando mbiri: single mode ne multimode. Chinyorwa chino chichataura nezve single-mode ne multimode categories uye mashandiro azvo, saka ramba uchidzidza nezvemusiyano uripo pakati pe single-mode ne multimode.

Mode imwe chete vs Multimode fiber.jpg

Kutanga, pamwe ndinofanira kufunga nezvehukuru hwepakati. Ini ndinofunga kuti single-mode ine core diki, senge 9 microns, nepo multimode yakakura, pamwe 50 kana 62.5 microns. Hukuru hwepakati hunogona kukanganisa kufamba kwechiedza. Mune single-mode, sezvo core iri diki, pamwe nzira imwe chete yechiedza inogona kupararira, saka zita racho. Multimode ingabvumira nzira dzakawanda. Asi "mode" inorevei pano? Ini ndinofunga kuti mode inzira iyo chiedza chinogona kupfuura nepakati pefiber. Saka mu multimode, chiedza chinogona kutora nzira dzakawanda, izvo zvinogona kukonzera kupararira kwemodal. Ndipo panosvika nzira dzakasiyana panguva dzakasiyana, zvichikonzera kukanganiswa kwechiratidzo. Saka single-mode, ine nzira imwe chete, inodzivirira izvi. Izvi zvinoreva kuti single-mode inogona kubata bandwidth yakakwira pamusoro pedaro refu.

Asi, ko zvino, ko tsime rechiedza? Ini ndinofunga kuti single-mode inoshandisa lasers, iyo yakanyatsojeka uye inogona kutarisisa chiedza mu core diki. Multimode ingashandisa LEDs kana lasers dzakachipa nekuti core yakakura uye iri nyore kubatanidza chiedza. Lasers inodhura, saka single-mode transceivers ingangove inodhura kupfuura multimode.

Kureba ndechimwe chikonzero. Kana single-mode isina kupararira kwakawanda, inogona kufamba daro refu pasina kuora kwechiratidzo. Multimode, ine modal dispersion, ingave nedaro refu. Pamwe semakiromita e single-mode uye mazana emamita e multimode? Asi ndinofanira kutarisa nhamba chaidzo. Ndakambonzwa mazwi akaita seOM3 neOM4 e multimode fibers, ane chekuita nekushanda kwawo. Idzi pamwe ndidzo mwero wemhando dzakasiyana dze multimode, dzakagadzirirwa kumhanya kwakanyanya pane mamwe madaro.

Bandwidth—single-mode inofanira kunge iine bandwidth yakakura nekuti hapana modal dispersion. Saka pakutaurirana kwekukurumidza, kwenguva refu senge pakati pemaguta kana munharembozha dzenharembozha, single-mode ndiyo iri nani. Multimode inoshandiswa munzvimbo dzedata kana network dzemunharaunda uko daro riri pfupi, uye mutengo ndiwo dambudziko guru.

Pamutengo, fiber pachayo: single-mode inogona kunge yakafanana pamutengo, asi ma transceivers (senge SFP modules) anodhura zvakanyanya nekuda kwema lasers. Multimode transceivers akachipa, asi fiber inogona kunge yakachipa zvishoma? Mira, kwete, ndinofunga single-mode fiber yakachipa mune dzimwe nguva nekuti iri nyore? Kana kuti pamwe mitengo yekuisa yakasiyana. Mira, kuisa kungave kwakaoma kune single-mode nekuti core idiki, ichida ma connectors akanyatsojeka uye alignment. Izvozvo zvinogona kuita kuti kuisa kudhure zvakanyanya, kunyangwe fiber pachayo isingadhuri.

Mashandisirwo: single-mode yedaro refu, telecom, ISPs. Multimode yeLANs, data centers, campus networks. Zvakare, pamwe mumamiriro ezvinhu apo bandwidth yakakwira inodiwa asi ichiita mapfupi. Sekubatanidza maseva mukati medata centre.

Mawavelength anoshandiswa: Single-mode inowanzoshandisa 1310 nm uye 1550 nm, nepo multimode ingashandisa 850 nm uye 1300 nm. Mawavelength akareba mu single-mode anogona kunge asina kudzikama, zvichikonzera kuti asvike kwenguva refu.

Pane chimwe chinhu nezve chromatic dispersion, iyo inokanganisa single-mode zvakanyanya padaro refu, asi vanoshandisa dispersion-shifted fibers kana compensators. Dambudziko guru reMultimode i modal dispersion, iyo inoderedzwa nekushandisa graded-index fibers apo refractive index inochinja zvishoma nezvishoma, zvichideredza modal dispersion zvichienzaniswa ne step-index.

Uye kune mhando dzakasiyana dzemafiber emultimode, seOM1, OM2, OM3, OM4, OM5. Imwe neimwe ine bandwidth yakasiyana uye kugona kure. OM3 neOM4 zvakagadzirirwa kushandiswa ne850 nm VCSELs (vertical-cavity surface-emitting lasers) kuti zvikwanise kumhanya zvakanyanya se10G, 40G, 100G Ethernet. OM5 ndeye wavelength division multiplexing mu multimode.

Saka tichibatanidza zvese izvi: saizi yepakati, chitubu chechiedza, daro, bandwidth, mutengo, mashandisirwo, uye zviyero. Nzira imwe chete yekufamba kwenguva refu, inodhura zvakanyanya, uye inoshanda zvakanyanya. Nzira dzakawanda dzekufamba kwenguva pfupi, mutengo wakaderera, zviri nyore kuisa asi zvinoganhurirwa nekupararira kwemodal.

Ndinofanirawo kutarisa kana paine mimwe misiyano, senge bend radius kana durability. Pamwe single-mode inonyanya kubatwa nemakonzo nekuda kwe core diki, asi handina chokwadi. Multimode inogona kunge ichirerutsira zvakanyanya panyaya iyoyo. Uyewo, inoenderana nemidziyo iripo. Kana network yatove kushandisa multimode, kuvandudza kungada kuchinja fiber nema transceivers.

Imwe pfungwa: kudzivirira ramangwana. Single-mode inogona kuwedzerwa zvakanyanya kuti iwedzere kumhanya pasina kutsiva fiber, nepo multimode inogona kunge iine miganho sezvo zvinodiwa zvebandwidth zvichikura kupfuura zvinogona kuitwa nefiber ne modal dispersion.

Mira, asi nekufambira mberi mu multimode seOM5, pamwe vanogona kumhanya zvakanyanya padaro diki. Saka sarudzo inoenderana nekushandiswa kwacho uye kukura kunotarisirwa.

Ndinofanira kuronga zvese izvi kuti zvienzaniswe zvakanaka. Pamwe tanga nekusiyana kukuru, wozoenda kuzvinhu zvehunyanzvi zvakaita sebandwidth, daro, mutengo, maapplication, nezvimwewo. Zvakare, isa tafura pfupiso kuti uverenge nekukurumidza.

Regai ndione mamwe manhamba. Single-mode core i8-10 microns, multimode 50 kana 62.5. Single-mode inoshandisa laser sources (1310, 1550 nm), multimode inoshandisa LED/VCSEL (850, 1300 nm). Madaro makuru: single-mode inogona kusvika makiromita makumi, kunyangwe makiromita zana nemidziyo yakakodzera. Multimode ye100M kusvika 550m zvichienderana ne standard (OM3/OM4). Mutengo: single-mode transceivers inodhura, asi mutengo we fiber wakaenzana kana kuti wakakwira zvishoma? Kana kuti pamwe fiber yakachipa, asi mutengo wese we system wakakwira nekuda kwe transceivers.

Uyewo, bandwidth: single-mode ine bandwidth isina muganho yekushandisa, nepo multimode ichiganhurirwa nekupararira kwemodal. Saka pa10G, 40G, 100G, multimode inogona kuibata asi iri kure kure. Single-mode inogona kubata kumhanya ikoko kure kure.

Panyaya yemitemo, single-mode inofukidzwa neITU-T G.652, G.653, nezvimwewo, nepo multimode iri TIA-492-AAAB (OM1), nezvimwewo.

Kuisa nekugadzirisa: single-mode inoda kunyatsorongeka, saka pamwe vashandi vane hunyanzvi hwakawanda, mutengo wekutanga wakakwira. Multimode iri nyore kushanda nayo, mutengo wekuisa wakaderera.

Cable yeFiber Optic yeMultimode Mode kana Single Mode.jpg

Saka kuenzanisa kwakazara kwaizobatanidza zvese izvi. Pamwe taurawo nezvekushanduka-shanduka, senge kuti single-mode iri kuwanda sei kunyangwe munzvimbo pfupi nekuda kwekudzikira kwemitengo ye optics, asi multimode ichiri kushanda mumamiriro ezvinhu anonyanya kudhura uye asingasvike kure.

Single-Mode vs. Multimode Fiber: Ongororo Yekupedzisira

1. Dhayamita Yepakati

Fiber yeModhi Imwe Chete (SMF):
- Chinhu chikuru:8–10 maikironi(yakatetepa zvikuru).
- Yakagadzirirwanzira yechiedza chimwe chetekupararira, kuderedza kukanganiswa kwechiratidzo.
Multimode Fiber (MMF):
- Chinhu chikuru:50 kana 62.5 maikironi(yakafara).
- Zvinotsigiranzira dzakawanda dzechiedza, zvichikonzera kupararira kwemodal pamusoro pedaro.

2. Chitubu cheChiedza & Urefu hweMafungu

SMF:
- Madiode eLaser(semuenzaniso, DFB, FP lasers).
- Urefu hwemafungu:1310 nm(chinowanzo shandiswa),1550 nm(kufamba kwenguva refu, kudzikira kwemusoro).
MMF:
- Ma LED kana maVCSEL(Malaser Anoburitsa Ruvara Rwakatsetseka).
- Urefu hwemafungu:850 nm(zvinowanzoitika) uye1300 nm.

3. Bandwidth & Distance

SMF:
- Bandwidth isina muganho(mupfungwa) nekuda kwekusapararira kwemodal.
- Madaro marefu: Kusvika pamakiromita anopfuura zana(nekuwedzera simba).
- Yakanakiranhare dzenhare dzenhare, tambo dzepasi pegungwa, uye network dzemetro.
MMF:
- Bandwidth yakaganhurirwanekuda kwekupararira kwemodal.
- Madaro mapfupi:
  - OM1/OM2: 100–550 metres (kusvika 1 Gbps).
  - OM3/OM4/OM5: 100–550 metres (10–100 Gbps).
- Inoshandiswa muMaLAN, nzvimbo dzedata, uye network dzekambasi.

4. Mutengo

SMF:
- Mutengo wepamusoro we transceiver(ma laser anodhura).
- Mutengo wefaibha: Inoenzaniswa kana kuti yakakwira zvishoma pane MMF.
- Kuiswa: Zvinoda kunyatsorongeka (basa rine hunyanzvi).
MMF:
- Mutengo we transceiver wakaderera(Ma LED/VCSEL akachipa).
- Mutengo wefaibha: Yakakwira zvishoma kune mamakisi matsva (OM3/OM4).
- Kuiswa: Zviri nyore nekuda kwepakati yakakura.

5. Kupararira

SMF:
- Kupararira kweChromatic(yakavakirwa pahurefu hwemafungu) inotonga pamusoro pemadaro marefu.
- Inotungamirwa kuburikidza nefibers dzakapararirakana kuti zvinotsiva.
MMF:
- Kupararira kweModal(musiyano wehurefu hwenzira) inoderedza daro/bandwidth.
- Yakaderedzwa kuburikidzafibers dzakagadzirwa negiredhi(OM3/OM4/OM5).

6. Mashandisirwo

SMF:
- Manetwork ekufambisa zvinhu kwenguva refu, FTTH (Fiber-to-the-Home), maISP, CATV, maWAN anomhanya zvakanyanya.
MMF:
- Nzvimbo dzedata (server-to-switch), maLAN, masisitimu ekuchengetedza, kutaurirana kwenguva pfupi.

7. Mitemo

SMF:
- ITU-T G.652 (mode imwe chete yakajairika), G.653 (yakachinja-chinja kupararira).
MMF:
- OM1/OM2: TIA-492-AAAB (62.5/125 µm) uye TIA-492-AABB (50/125 µm).
- OM3/OM4/OM5: Yakagadzirirwa maVCSEL uye inomhanya zvakanyanya (40G/100G).

8. Kuratidza Remangwana

SMF:
- Inogona kukwidziridzwa kana zvichizovandudzwa mune ramangwana (kumhanya kweterahertz nehunyanzvi hutsva hwekuchinja).
MMF:
- OM5inotsigira wavelength division multiplexing (SWDM) asi inoganhurirwa nedaro.

Tafura Yekuenzanisa

Chinhu	Fiber yeModhi Imwe Chete	Fiber yeMultimode
Dhayamita Yepakati	8–10 maikironi	50/62.5 maikironi
Chitubu cheChiedza	Diode yeLaser	LED/VCSEL
Kureba kwewave	1310 nm, 1550 nm	850nm, 1300nm
Bandwidth	Zvinenge zvisingaperi	Inogumira pakupararira kwemodal
Kureba Kwakanyanya	makiromita anopfuura zana	100 m (OM1) kusvika 550 m (OM4/OM5)
Mutengo	Matransceiver epamusoro, faibha yakaderera	Matransceiver epasi, faibha yepamusoro
Mashandisirwo	Telecom, rwendo rurefu	Nzvimbo dzedata, maLAN
Maitiro	ITU-T G.652, G.653	TIA OM1–OM5
Kupararira	Chromatic (kufamba kwenguva refu)	Modal (inoganhurira daro/bandwidth)

Zvinhu Zvinokosha Zvaunofanira Kuziva

Sarudza SMFyedaro refu, bandwidth yakakwirirazvinodiwa (semuenzaniso, maISP, tambo dzepasi pegungwa).
Sarudza MMFyeisingadhuri, isingasvibiswi zvakanyanyamashandisirwo (semuenzaniso, nzvimbo dzedata, network dzekambasi).
OM4/OM5MMF inotsigira 40G/100G pamusoro pe150–550m, ukuwo SMF ichikosha kuti ikwanise kukura mune ramangwana.

Mhando dzese dzefiber dziripo panguva imwe chete, SMF ichinyanya kufamba kwenguva refu uye MMF ichiramba yakakosha munzvimbo dzebhizinesi. Kufambira mberi muSMF optics (ma lasers anodhura zvishoma) kuri kuwedzera kushandiswa kwayo mu metro nedata center interconnects.

Taura Nesu, Wana Zvigadzirwa Zvemhando Yepamusoro uye Basa Rekungwarira.

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