Joalo ka ha bohle re tseba, fiber ea multimode hangata e arotsoe ka OM1, OM2, OM3 le OM4.Joale ho thoe'ng ka fiber ea single mode?Ebile, mefuta ea fiber mode e le 'ngoe e bonahala e rarahane haholo ho feta fiber ea multimode.Ho na le mehloli e 'meli ea mantlha ea litlhaloso tsa mofuta o le mong oa fiber optical.E 'ngoe ke letoto la ITU-T G.65x,' me e 'ngoe ke IEC 60793-2-50 (e hatisitsoeng e le BS EN 60793-2-50).Ho e-na le ho bua ka mantsoe a ITU-T le IEC ka bobeli, ke tla khomarela ITU-T G.65x e bonolo feela sehloohong sena.Ho na le lintlha tse 19 tse fapaneng tsa mode optical fiber tse hlalositsoeng ke ITU-T.
Mofuta o mong le o mong o na le sebaka sa ona sa ts'ebeliso mme phetoho ea lintlha tsena tsa optical fiber e bonts'a phetoho ea theknoloji ea sistimi ea phetisetso ho tloha ho kenngoeng ha pele ha mofuta o le mong oa optical fiber ho fihlela kajeno.Ho khetha e nepahetseng bakeng sa morero oa hau ho ka ba bohlokoa ho latela ts'ebetso, litšenyehelo, ts'epahalo le polokeho.Ka poso ena, nka hlalosa hanyenyane ka phapang pakeng tsa litlhaloso tsa G.65x letoto la malapa a le mong oa mode optical fiber.Ke tšepa ho u thusa ho etsa qeto e nepahetseng.
G.652
Fiber ea ITU-T G.652 e boetse e tsejoa e le SMF e tloaelehileng (fiber mode e le 'ngoe)' me ke fiber e sebelisoang ka ho fetisisa.E hlaha ka mefuta e mene (A, B, C, D).A le B li na le tlhoro ea metsi.C le D li felisa tlhōrō ea metsi bakeng sa ts'ebetso e feletseng ea mahlaseli.Likhoele tsa G.652.A le G.652.B li etselitsoe ho ba le zero-dispersion wavelength haufi le 1310 nm, ka hona li ntlafalitsoe hore li sebetse sehlopheng sa 1310-nm.Li ka boela tsa sebetsa sehlopheng sa 1550-nm, empa ha e ea ntlafatsoa sebakeng sena ka lebaka la khaso e phahameng.Hangata likhoele tsena tsa optical li sebelisoa ka har'a LAN, MAN le litsamaiso tsa marang-rang tsa phihlello.Mefuta e sa tsoa feta (G.652.C le G.652.D) e na le tlhōrō e fokotsehileng ea metsi e lumellang hore e sebelisoe sebakeng sa maqhubu a pakeng tsa 1310 nm le 1550 nm e tšehetsang phetiso ea Coarse Wavelength Division Multiplexed (CWDM).
G.653
G.653 single mode fiber e ile ea ntlafatsoa ho rarolla khohlano ena pakeng tsa bandwidth e molemo ka ho fetisisa sebakeng se seng sa wavelength le tahlehelo e tlaase ho e 'ngoe.E sebelisa sebopeho se rarahaneng haholoanyane sebakeng sa mantlha le sebaka se senyenyane haholo sa mantlha, 'me bolelele ba leqhubu la ho hasanya ha zero chromatic bo ile ba fetisetsoa ho 1550 nm ho tsamaellana le tahlehelo e tlase haholo ho fiber.Ka hona, fiber ea G.653 e boetse e bitsoa fiber ea dispersion-shifted (DSF).G.653 e na le boholo bo fokotsehileng ba mantlha, bo ntlafalitsoeng bakeng sa mekhoa ea phetisetso ea mokhoa o le mong oa nako e telele o sebelisa li-erbium-doped fiber amplifiers (EDFA).Leha ho le joalo, matla a eona a phahameng ka har'a fiber core e ka hlahisa litlamorao tse se nang moeli.E 'ngoe ea tse thata ka ho fetisisa, tse nang le maqhubu a mane (FWM), li hlaha tsamaisong ea Dense Wavelength Division Multiplexed (CWDM) e nang le zero chromatic dispersion, e bakang crosstalk e sa amoheleheng le ho kena-kenana pakeng tsa litsela.
G.654
Litlhaloso tsa G.654 tse nang le sehlooho se reng "litšobotsi tsa "cut-off shifted single mode optical fiber and cable."E sebelisa boholo bo boholo ba mantlha bo entsoeng ka silika e hloekileng ho fihlela ts'ebetso e ts'oanang ea nako e telele e nang le attenuation e tlase sehlopheng sa 1550-nm.Hangata e na le phallo e phahameng ea chromatic ho 1550 nm, empa ha e etselitsoe ho sebetsa ho 1310 nm ho hang.Fiber ea G.654 e khona ho sebetsana le maemo a phahameng a matla pakeng tsa 1500 nm le 1600 nm, e etselitsoeng haholo-holo bakeng sa lisebelisoa tse telele tse tsamaeang ka tlas'a leoatle.
G.655
G.655 e tsejoa e le fiber e seng zero dispersion-shifted fiber (NZDSF).E na le palo e nyenyane, e laoloang ea ho hasana ha chromatic ho C-band (1530-1560 nm), moo li-amplifiers li sebetsang hantle ka ho fetisisa, 'me li na le sebaka se seholo sa mantlha ho feta G.653 fiber.Fiber ea NZDSF e hlōla mathata a amanang le ho kopanya maqhubu a mane le liphello tse ling tse se nang moeli ka ho tsamaisa leqhubu la zero-dispersion wavelength ka ntle ho fensetere ea ts'ebetso ea 1550-nm.Ho na le mefuta e 'meli ea NZDSF, e tsejoang e le (-D)NZDSF le (+D)NZDSF.Ka ho latellana li na le moepa o mobe le o motle khahlano le bolelele ba maqhubu.Setšoantšo se latelang se bontša thepa ea ho hasana ea mefuta e mene e meholo ea mofuta o le mong oa faeba.Phallo e tloaelehileng ea chromatic ea fiber e lumellanang le G.652 ke 17ps/nm/km.Li-fibers tsa G.655 li ne li sebelisoa haholo-holo ho tšehetsa mekhoa ea nako e telele e sebelisang phetiso ea DWDM.
G.656
Hape le likhoele tse sebetsang hantle ho pholletsa le mefuta e mengata ea maqhubu, tse ling li etselitsoe ho sebetsa hantle ka ho fetesisa ka bolelele bo itseng.Ena ke G.656, eo hape e bitsoang Medium Dispersion Fiber (MDF).E etselitsoe phihlello ea lehae le fiber ea nako e telele e sebetsang hantle ho 1460 nm le 1625 nm.Mofuta ona oa fiber o ile oa ntlafatsoa ho tšehetsa mekhoa ea nako e telele e sebelisang phetisetso ea CWDM le DWDM holim'a leqhubu le boletsoeng la wavelength.'Me ka nako e ts'oanang, e lumella ho tsamaisoa habonolo ha CWDM libakeng tsa metse e meholo, le ho eketsa matla a fiber ho mekhoa ea DWDM.
G.657
G.657 optical fibers e reretsoe hore e lumellane le G.652 optical fibers empa e na le ts'ebetso e fapaneng ea bend sensitivity.E etselitsoe ho lumella likhoele hore li kobehe, ntle le ho ama ts'ebetso.Sena se finyelloa ka foro ea optical e bonts'ang leseli le lahlehileng ho khutlela khubung, ho e-na le hore le lahlehe ka har'a masela, e leng ho nolofalletsang ho kobeha ho hoholo ha fiber.Joalo ka ha bohle re tseba, liindastering tsa cable TV le FTTH, ho thata ho laola radius e kobehileng tšimong.G.657 ke maemo a morao-rao bakeng sa lits'ebetso tsa FTTH, 'me, hammoho le G.652 ke eona e sebelisoang haholo marang-rang a faeba ea ho qetela.
Ho tsoa temaneng e kaholimo, rea tseba hore mefuta e fapaneng ea fiber mode e na le ts'ebeliso e fapaneng.Kaha G.657 e lumellana le G.652, bahlophisi ba bang le ba kenyang hangata ba ka 'na ba kopana le tsona.Ha e le hantle, G657 e na le sebaka se seholo sa ho kobeha ho feta G.652, se loketseng ka ho khetheha bakeng sa lits'ebetso tsa FTTH.'Me ka lebaka la mathata a G.643 a sebelisoang tsamaisong ea WDM, hona joale ha e sebelisoe hangata, e nkeloa sebaka ke G.655.G.654 e sebelisoa haholo ts'ebelisong ea leoatle.Ho latela temana ena, ke tšepa hore u na le kutloisiso e hlakileng ea likhoele tsena tsa mofuta o le mong, tse ka u thusang ho etsa qeto e nepahetseng.
Nako ea poso: Sep-03-2021