Nheyo uye kushandiswa kweEDFA erbium-doped fiber amplifier

Nheyo uye kushandiswa kweEDFA erbium-doped fiber amplifier

Iyo yakakosha chimiro cheEDFAerbium-doped fiber amplifier, iyo inonyanya kuumbwa neanoshanda svikiro (makumi emamita akareba doped quartz fiber, core diameter 3-5 microns, doping concentration (25-1000) x10-6), pombi light source (990 kana 1480nm LD), optical coupler uye optical isolator. Chiedza chechiratidzo uye mwenje wepombi zvinogona kupararira munzira imwechete (co-pomba), yakatarisana (reverse kupomba), kana mativi ese (bidirectional kupomba) muErbium fiber. Kana chiedza chechiratidzo uye chiedza chepombi chikaiswa mu erbium fiber panguva imwe chete, iyo erbium ion inofara kusvika kune yakakwirira simba (matatu-level system) pasi pechiito chepombi chiedza, uye nokukurumidza yakaora kusvika pamwero we metastable. Kana ichidzokera kumamiriro epasi pasi pechiito chechiitiko chechiedza chechiitiko, photon inoenderana nechiedza chechiratidzo inobudiswa, kuitira kuti chiratidzo chiwedzere. Yayo amplified spontaneous emission (ASE) spectrum ine hombe bandwidth (kusvika 20-40nm) uye ine mapikisi maviri anoenderana ne1530nm uye 1550nm zvakateerana.

The chikuru zvakanakiraEDFA amplifierkuwana kukuru, bandwidth yakakura, simba rakawanda rekubuda, kukwirira kwekupomba, kuderera kwekuisa kurasikirwa, uye kusanzwa kune polarization nyika.

Iyo inoshanda musimboti weerbium-doped fiber amplifier

Iyo Erbium-doped fiber amplifier.EDFA Optical Amplifier） inonyanya kuumbwa neerbium-doped fiber (inenge 10-30m pakureba) uye pombi chiedza sosi. Nheyo yekushanda ndeyokuti erbium-doped fiber inogadzira mwaranzi inokurudzirwa pasi pechiito chepombi light source (wavelength 980nm kana 1480nm), uye chiedza chinopenya chinoshanduka nekuchinja kwechiratidzo chechiedza chekupinda, icho chakaenzana nekukudza chiratidzo chechiedza chekupinda. Mhedzisiro yacho inoratidza kuti kuwana kweErbium-doped fiber amplifier kunowanzo 15-40db, uye kurekidzana kure kunogona kuwedzerwa nekupfuura 100km. Saka, vanhu havagone kuita asi kubvunza: sei masayendisiti akafunga kushandisa doped erbium mu fiber amplifier kuti awedzere kusimba kwemafungu echiedza? Isu tinoziva kuti erbium chinhu chisingawanikwe pasi, uye zvisingawanzo zvinhu zvepasi zvine maitiro azvo akasarudzika. Doping isingawanzo zvinhu zvepasi mumidziyo yemaziso yakashandiswa kwenguva yakareba kuti ivandudze mashandiro emidziyo yemaziso, saka izvi hazvisi netsaona. Uye zvakare, nei kureba kwepombi mwenje sosi inosarudzwa pa980nm kana 1480nm? Muchokwadi, kureba kwepombi mwenje sosi inogona kuita 520nm, 650nm, 980nm, uye 1480nm, asi kuita kwakaratidza kuti wavelength ye1480nm pombi mwenje sosi laser inoshanda ndiyo yepamusoro, inoteverwa nehurefu hwe980nm pombi light source.

Chimiro chemuviri

Basic chimiro cheerbium-doped fiber amplifier (EDFA Optical Amplifier). Iko kune isolator pamagumo ekuisa uye iyo inobuda inopera, chinangwa ndechekuita iyo optical chiratidzo chenzira imwe kutapurirana. Iyo pombi exciter ine wavelength ye980nm kana 1480nm uye inoshandiswa kupa simba. Basa recoupler nderekubatanidza chiratidzo chepombi chekupinza uye mwenje wepombi muerbium-doped fiber, uye kuendesa simba repombi mwenje kune yekupinza chiratidzo chemaziso kuburikidza nekuita kweerbium-doped fiber, kuti uone kukwidziridzwa kwesimba kweiyo yekupinza yechiratidzo chiratidzo. Kuti uwane yakakwira yekubuda kwemagetsi emagetsi uye yakaderera ruzha index, iyo Erbium-doped fiber amplifier inoshandiswa mukudzidzira inotora chimiro chemapombi maviri kana anopfuura mapombi ane akasarudzika pakati kuti aparadzane. Kuti uwane yakafara uye flatter kuwana curve, kuwana flattening sefa inowedzerwa.

Iyo EDFA ine zvikamu zvishanu zvikuru: Erbium-doped fiber (EDF), Optical coupler (WDM), optical isolator (ISO), Optical Filter, uye Pumping Supply. Mapombi anowanzo shandiswa anosanganisira 980nm uye 1480nm, uye aya mapombi maviri ane hunyanzvi hwekupomba uye anoshandiswa zvakanyanya. 980nm pombi mwenje sosi ruzha coefficient yakaderera; Iyo 1480nm pombi mwenje sosi ine yakakwirira yekupomba uye inogona kuwana yakakura kubuda simba (inenge 3dB yakakwirira kupfuura 980nm pombi light source).

advantage

1. Kushanda kwewavelength kunopindirana nehwindo rekudzikisa zvishoma re single-mode fiber.

2. High coupling kunyatsoshanda. Nekuti iri fiber amplifier, zviri nyore kubatanidza nekutapurirana fiber.

3. High simba kutendeuka kushanda zvakanaka. Nheyo yeEDF idiki pane yekufambisa fiber, uye chiratidzo chechiedza uye mwenje wepombi zvinofambiswa panguva imwe chete muEDF, saka iyo optical capacity yakanyanyisa. Izvi zvinoita kuti kupindirana pakati pechiedza uye kuwana yepakati Er ion kuzara zvakanyanya, pamwe nehurefu hwakakodzera hweerbium-doped fiber, saka kushandurwa kwesimba kwechiedza kwakakwira.

4. Kuwanikwa kwepamusoro, kuderera kweruzha indekisi, hombe yekubuda simba, yakaderera crosstalk pakati pezviteshi.

5. Yakagadzikana kuwana maitiro: EDFA haina hanya nekushisa, uye kuwana kune zvishoma kuwirirana ne polarization.

6. Iyo yekuwana ficha yakazvimirira pane system bit rate uye data fomati.

kushomeka

1. Nonlinear effect: EDFA inowedzera simba remaziso kuburikidza nekuwedzera simba remaziso rakaiswa mufiber, asi yakakura zviri nani. Kana iyo optical simba ichiwedzerwa kune imwe nhanho, iyo isiri-linear mhedzisiro ye optical fiber ichagadzirwa. Naizvozvo, kana uchishandisa optical fiber amplifiers, kutarisisa kunofanirwa kubhadharwa kune kukosha kwekudzora iyo imwechete-channel inopinda fiber optical simba.

2. The gain wavelength range yakagadziriswa: kushanda kwewavelength yeC-band EDFA ndeye 1530nm ~ 1561nm; Iyo yavelength yekushanda yeL-bhendi EDFA ndeye 1565nm ~ 1625nm.

3. Kusaenzana kuwana bandwidth: The gain bandwidth yeEDFA erbium-doped fiber amplifier yakakura kwazvo, asi kuwana spectrum yeEDF pachayo haisi flat. Iyo yekuwana flattening sefa inofanirwa kugamuchirwa kuti igadzikane iyo inowanikwa muWDM system.

4. Dambudziko rekuwedzera kwechiedza: Kana nzira yechiedza yakajairika, erbium ions inofara nechiedza chepombi inotakurwa nechiedza chechiratidzo, nokudaro kupedzisa kukwidziridzwa kwechiedza chechiratidzo. Kana mwenje wekupinda ukaderedzwa, nekuti metastable erbium ions inoramba ichiungana, kana chiratidzo chechiedza chadzoreredzwa, simba rinosvetuka, zvichikonzera kubhururuka kwechiedza.

5. Mhinduro kune optical surge ndeyekuona iyo automatic optical power reduction (APR) kana automatic optical power off (APSD) basa muEDFA, kureva kuti, EDFA inoderedza simba kana kuti inodzima simba kana pasina chiedza chekupinza, nokudaro ichidzvinyirira kuitika kwechiitiko chekuputika.

Application mode

1. Iyo booster Amplifier inoshandiswa kukwidziridza simba reakawanda wavelength masaini mushure meiyo booster wave, uye wozoatumira. Sezvo simba rechiratidzo mushure meiyo booster wave kazhinji yakakura, iyo ruzha index uye kuwana kwesimba amplifier hazvina kunyanya kukwirira. Iine simba guru rekubuda.

2. Mutsara-amplifier, mushure mesimba Amplifier, inoshandiswa nguva nenguva kubhadhara Mutsara wekutapurirana kurasikirwa, kazhinji inoda indekisi shoma shoma uye simba guru rinobuda.

3. Pre-Amplifaya: Pamberi pekuparadzanisa uye mushure memutsara wemutsara, inoshandiswa kukwidziridza chiratidzo uye kuvandudza kunzwisiswa kweanogamuchira (muchiitiko chekuti optical signal-to-noise ratio (OSNR) inosangana nezvinodiwa, simba guru rekupinza rinogona kudzvinyirira ruzha rwemugamuchiri pachake uye kuvandudza kunzwisiswa kwekugamuchira), uye indekisi yeruzha iduku zvikuru. Hapana chikuru chinodiwa pane simba rekubuda.