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Litšobotsi tsa Sehlahisoa

Litokomane & Media

Maemo a Tikoloho le Liantle

Lisebelisoa tse Eketsehileng

Fiber optics, hape e ngotsoe fiber optics, themahlaleeaphetisodata, lentsoe, le litšoantšo ka ho feta ha leseli ka har'a likhoele tse tšesaane, tse bonaletsang.Homehala ea puisano, theknoloji ea fiber optic e batla e nketse sebakakoporoterata kasebaka se selelele mohalamela, 'me e sebelisetsoa ho hokahanyalik'homphieuthaka haremarang-rang a sebaka sa lehae.Fiberopticshape ke motheo oa li-fiberscope tse sebelisoang ho hlahloba likarolo tse ka hare tsa 'mele (endoscopy) kapa ho hlahloba bokahare ba lihlahisoa tsa sebopeho se entsoeng.

Mokhoa oa motheo oa fiber optics ke fiber e tšesaane ea moriri eo ka linako tse ling e entsoeng ka eonapolasetikiempa hangata haholo eakhalase.Khalase e tloaelehileng ea optical fiber e na le bophara ba 125 micrometres (μm), kapa 0.125 mm (0.005 inch).Ha e le hantle, sena ke bophara ba sekoahelo, kapa lera le bonahatsang ka ntle.Mokotla, kapa moqomo o fetisang ka hare, o ka ba le bophara bo nyane joalo ka 10μm.Ka mokhoa o tsejoang e leboinahano bo felletseng ba ka hare,kganyamahlaseli a benyang ka har'a lekotikoti la fiberjalaka har'a khubu bakeng sa libaka tse kholo tse nang le phokotso e nyane haholo, kapa phokotso ea matla.Tekanyo ea ho nyenyefatsa bohole e fapana ho ea ka bolelele ba maqhubu a khanya le ho ea katlhamoea fiber.

Ha likhoele tsa khalase tsa moralo oa mantlha / li-cladding li ne li hlahisoa mathoasong a lilemo tsa bo-1950, boteng ba litšila bo ne bo thibela mosebetsi oa bona ho bolelele bo bokhuts'oane bo lekaneng bakeng sa endoscopy.Ka 1966, baenjiniere ba motlakaseCharles Kaole George Hockham, ea sebetsang Engelane, ba ile ba etsa tlhahiso ea ho sebelisa likhoele bakeng satlhaeletsano, 'me ka mor'a lilemo tse mashome a mabelisilikalikhoele tsa khalase li ne li hlahisoa ka bohloeki bo lekaneng horeinfraredmabone a khanya a ne a ka tsamaea lik'hilomithara tse 100 kapa ho feta ho sa hlokahale hore a phahamisoe ke batho ba pheta-phetoang.Ka 2009 Kao o ile a fuoa khau eaMoputso oa Nobelho Fisiks bakeng sa mosebetsi oa hae.likhoele tsa polasetiki, tseo hangata li entsoeng ka polymethylmethacrylate,polystyrene, kapapolycarbonate, li theko e tlaase ho li hlahisa ebile li tenyetseha ho feta likhoele tsa khalase, empa ho fokotsoa ha tsona ho hoholo ho thibela tšebeliso ea tsona ho likhokahanyo tse khutšoane ka har'a meaho kapalikoloi.

Optical telecommunication hangata e etsoa kainfraredkhanya ka har'a maqhubu a maqhubu a 0.8–0.9 μm kapa 1.3–1.6 μm—botelele ba maqhubu bo hlahisoang ka katleho keli-diode tse ntšang khanyakapasemiconductor lisebelisoa tsa laser'me tse fokolloang ke likhoele tsa khalase.Tlhahlobo ea fiberscope ho endoscopy kapa indastering e etsoa ka maqhubu a bonahalang, ho sebelisoa lesela le le leng la likhoele.khantšasebaka se hlahlobiloeng se nang le kganya le ngatana enngwe e sebetsang joalo ka e telelelensebakeng sa ho fetisetsa setšoantšo holeihlo la mothokapa khamera ea video.

Li-fiber optic receivers li fetolela mats'oao a leseli ho a sebelisa mats'oao a motlakase ho sebelisoa ke lisebelisoa tse joalo ka marang-rang a likhomphutha.Lisebelisoa tsena tsa electro-optical li na le sebui sa optical, amplifier ea lerata le tlase, le potoloho ea boemo ba matšoao.Ka mor'a hore mochine oa optical o fetole lets'oao la optical le kenang hore e be lets'oao la motlakase, amplifier e e eketsa ho isa boemong bo loketseng bakeng sa ts'ebetso e eketsehileng ea matšoao.Mofuta oa modulation le litlhoko tsa tlhahiso ea motlakase li khetholla hore na ho hlokahala lipotoloho life tse ling.

Li-fiber optic receivers li sebelisa li-positive-negative junctions (PN), li-photodiode tse ntle-intrinsic negative (PIN), kapa li-avalanche photodiodes (APD) e le li-optical detectors.Letšoao la leseli le kenang le romelloa ke fiber optic transmitter (kapa transceiver) 'me le tsamaea ka mohala o le mong kapa oa mefuta e mengata ea optical, ho itšetlehile ka bokhoni ba sesebelisoa.Demodulator ea data e fetola lets'oao le khanyang hape hore e be sebopeho sa eona sa mantlha sa motlakase.Lits'ebetsong tse rarahaneng tsa fiber optic, likarolo tsa wavelength division multiplexing (WDM) li boetse li sebelisoa.

Li-semiconductors le li-Photodiode

Setsi sa database sa Engineering360 SpecSearch se lumella bareki ba indasteri ho khetha lihlahisoa ka mofuta oa semiconductor le mofuta oa photodiode.Mefuta e 'meli ea li-semiconductors e sebelisoa ho li-receiver tsa fiber optic.

Li-semiconductors tsa silicon li sebelisoa ho li-receiver tsa maqhubu a makhutšoane a nang le mefuta e fapaneng ea 400 nm ho isa ho 1100 nm.

Li-semiconductors tsa indium gallium arsenide li sebelisoa ho li-receiver tsa bolelele bo bolelele tse nang le mefuta e mengata ea 900 nm ho isa ho 1700 nm.

Joalokaha ho hlalositsoe ka holimo, li-receiver tsa fiber optic li sebelisa mefuta e meraro e fapaneng ea li-photodiode.

Li-junctions tsa PN li thehoa moeling oa semiconductor ea mofuta oa P le N, hangata ka kristale e le 'ngoe ka doping.

Li-photodiode tsa PIN li na le sebaka se seholo, se sa nke lehlakore se pakeng tsa libaka tsa P-doped le N-doped semiconducting.

Li-APD ke li-photodiode tsa PIN tse ikhethileng tse sebetsang ka matla a phahameng a reverse.

Li-amplifiers le likhokahanyo

Li-receiver tsa fiber optic li sebelisa li-amplifiers tse tlase-tlase kapa tsa transimpedance.

Ka lisebelisoa tse tlase tsa impedance, bandwidth le lerata la moamoheli li fokotseha ka ho hanyetsa.

Ka lisebelisoa tsa trans-impedance, bandwidth ea moamoheli e angoa ke phaello ea amplifier.

Ka tloaelo, li-receiver tsa fiber optic li kenyelletsa adaptara e ntšoang bakeng sa likhokahano le lisebelisoa tse ling.Likhetho li kenyelletsa D4, MTP, MT-RJ, MU, le SC

Tshebetso ya Moamohedi

Ha o sebelisa Engineering360 ho hlahisa lihlahisoa, bareki ba lokela ho hlakisa liparamente tsena bakeng sa ts'ebetso ea seamoheli sa fiber optic.

Sekhahla sa data ke palo ea li-bits tse fetisoang ka motsotsoana, 'me ke pontšo ea lebelo.

Nako ea ho phahama ha moamoheli e boetse ke pontšo ea lebelo, empa e bonts'a nako e hlokahalang hore lets'oao le fetohe ho tloha ho matla a boletsoeng a 10% ho isa ho 90%.

Sensitivity e bonts'a lets'oao le fokolang la optical leo sesebelisoa se ka se fumanang.

Dynamic range e amana le kutlo, empa e bontša sebaka sa matla seo sesebelisoa se sebetsang ho sona.

Boikarabelo ke karo-karolelano ea matla a mahlaseli a li-watts (W) ho ea ho sephetho sa photocurrent ho li-ampere (A).