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    Njira ya OVD: 185mm G.657.A1 Optical Fiber Preform
    Njira ya OVD: 185mm G.657.A1 Optical Fiber Preform

    Njira ya OVD: 185mm G.657.A1 Optical Fiber Preform

      Lumikizanani nafe

      Mafotokozedwe a Preform

      Preform Miyeso

      Miyezo ya preform iyenera kukhala monga mu Table 1.1 pansipa.

      Table 1.1 Makulidwe a Preform

      Kanthu Zofunikira Ndemanga
      1 Avereji ya Diameter ya Preform (OD) 135-160 mm (Chidziwitso 1.1)
      2 Maximum Preform Diameter (ODmax) ≤ 160 mm
      3 Minimum Preform Diameter (ODmin) ≥ 130 mm
      4 Kulekerera kwa OD (mkati mwa Preform) ≤ 20 mm (mowongoka mbali)
      5 Preform Length (kuphatikiza gawo la chogwirira) 2600 ~ 3600 mm (Chidziwitso 1.2)
      6 Kutalika kothandiza ≥ 1800 mm
      7 Taper kutalika ≤ 250 mm
      8 Diameter kumapeto kwa taper ≤30
      9 Preform Non-circularity ≤ 1%
      10 Cholakwika cha Concentricity ≤ 0.5 μm
      11 Maonekedwe (Zindikirani 1.4&1.5)

      Zindikirani 1.1: Kutalika kwa preform kudzayezedwa mosalekeza molunjika ndi 10mm interval ndi Laser Diameter Measurement System ndikutanthauzidwa ngati avareji yamitengo yoyezedwa. Gawo la taper lidzatanthauzidwa ngati malo pakati pa A mpaka B. Gawo Lolunjika lidzatanthauzidwa ngati malo pakati pa B mpaka C. A ndi malo kumapeto kwa preform. B ndiye malo oyambira okhala ndi maziko ogwira mtima. C ndiye malo omaliza okhala ndi maziko ogwira mtima. D ndiye mbali yomaliza ya preform.
      Zindikirani 1.2: " Preform Length" idzafotokozedwa monga momwe tawonetsera pa Chithunzi 1.1.
      Zindikirani 1.3: Gawo Logwira Ntchito lidzafotokozedwa ngati malo pakati pa B mpaka C.
      Utali Wotalikirapo = Utali Wogwira Ntchito - ∑Utali Wosagwiritsidwa Ntchito Pachilema (LUD)

      Chithunzi 1.1 Mawonekedwe a Preform

      Njira ya OVD

      Zindikirani 1.4: The thovu m'dera cladding kunja (onani Chithunzi 1.2) adzaloledwa, malinga ndi kukula; chiwerengero cha thovu pa voliyumu unit sadzapitirira izi zatchulidwa Table 1.2 pansipa.

      Table 1.2 Bubble mu Preform

      Malo ndi Kukula kwa Bubble

      Chiwerengero / 1,000cm3

      Chigawo Chapakati (=pachimake + mkati)

      (Onani Zolemba 1.5)

      Dera la Outer Cladding

      (=chiyankhulo + chakunja)

      ~ 0.5 mm

      Palibe Kuwerengera

      0.5 ~ 1.0 mm

      ≤10

      1.0 ~ 1.5 mm

      ≤2

      1.5 ~ 2.0 mm

      ≤ 1.0

      2.1 mm ~

      (Onani Zolemba 1.5)

      Chithunzi 1.2 Mawonekedwe Osiyanasiyana a Preform

      Njira ya OVD2

      Zindikirani 1.5: Ngati pali zolakwika, zomwe zafotokozedwa pansipa, m'chigawo chapakati ndi / kapena dera lakunja lakunja, dera lomwe limaphatikizapo 3 mm kuchokera kumbali zonse za chilema lidzatanthauzidwa ngati gawo losagwiritsidwa ntchito (Chithunzi 1.3). Pachifukwa ichi, kutalika kogwira mtima kudzatanthauzidwa kupatula kutalika kwa gawo losagwiritsidwa ntchito. Gawo losagwiritsidwa ntchito lidzawonetsedwa ndi "Defect MAP", yomwe idzaphatikizidwa papepala loyendera.
      Zowonongeka:
      1. kuwira kokulirapo kuposa 2 mm muzovala zakunja,
      2. gulu la tinthu ting'onoting'ono tomwe timatchingira kunja;
      3. Kuwira mkati kapena pakati;
      4. chinthu chachilendo mu preform,

      Chithunzi 1.2 Mawonekedwe Osiyanasiyana a Preform

      Njira ya OVD3

      Chargeable Weight

      Kulemera kwamtengo wapatali kudzawerengedwa motere;
      Kulemera kwachargeable[g] ＝Kulemera konse kwa preform－Sikulemera kothandiza pa taper gawo ndikugwiritsitsa gawo－Chilema
      1. Kulemera kwathunthu kwa preform ndi kulemera koyesedwa ndi zida.
      2. "Kulemera kosagwira ntchito pa gawo la taper ndi chogwirizira" ndi mtengo wokhazikika womwe umatsimikiziridwa ndi chidziwitso.
      3. Kulemera kwachilema ＝ Kuchuluka kwa gawo la Chilema [cm3]) × 2.2 [g/cm3]; "2.2[g/cm3]" ndi makulidwe a galasi la quartz.
      4. "Volume of Defect part" ＝ (OD[mm]/2)2 ×Σ(LUD)×π; LUD =Utali Wosagwiritsidwa Ntchito Pachilema=Utali Wachilema+ 6[mm].
      5. Kuyeza kwa preform kudzayesedwa mosalekeza mu gawo lolunjika ndi 10mm interval ndi Laser Diameter Measurement System.

      Makhalidwe a Fiber Target

      Pamene mikhalidwe yojambulira ndi miyeso ndi yabwino komanso yosasunthika, ma preforms adzayembekezereka kukwaniritsa zofunikira za ulusi monga momwe tawonetsera mu Table 2.1.

      Table 2.1 Target Fiber Makhalidwe

       

      Kanthu

      Zofunikira

       

      1

      Kutsika kwa 1310 nm

      ≤ 0.35 dB/km

       

      Kutsika kwa 1383 nm

      ≤ 0.35 dB/km

      (Chidziwitso 2.1)

      Kuthamanga kwa 1550 nm

      ≤ 0.21 dB/km

       

      Kutsika kwa 1625 nm

      ≤ 0.23 dB/km

       

      Kufanana kwa Attenuation

      ≤ 0.05 dB/km pa 1310&1550 nm

       

      2

      Mode Field Diameter pa 1310 nm

      9.0 ± 0.4µm

       

      3

      Chingwe Cutoff Wavelength (λcc)

      ≤ 1260 nm

       

      4

      Zero Dispersion Wavelength (λ0)

      1300 ~ 1324 nm

       

      5

      Kubalalika pa 1285 ~ 1340 nm

      -3.8 ~ 3.5 ps/(nm·km)

       

      6

      Kubalalika 1550 nm

      13.3 ~ 18.6 ps/(nm·km)

       

      7

      Kubalalika 1625 nm

      17.2 ~ 23.7 ps/(nm·km)

       

      8

      Dispersion Slope pa λ0

      0.073 ~ 0.092 ps/(nm2·km)

       

      9

      Cholakwika cha Core/Cladding Concentricity

      ≤ 0.5 µm

       

      10

      Kutayika Kwapang'onopang'ono kwa Macro

      (Chidziwitso 2.2)

      30mm m'mimba mwake, 10turns, pa 1550nm

      ≤ 0.25 dB

      30mm m'mimba mwake, 10turns, pa 1625nm

      ≤ 1.0 dB

      20mm m'mimba mwake, 1turn, pa 1550nm

      ≤ 0.75 dB

      20mm m'mimba mwake, 1turn, pa 1625nm

      ≤ 1.5 dB


      Zindikirani 2.1: Kuchepetsa kwa 1383 nm pambuyo poyesa kukalamba kwa haidrojeni sikungaphatikizidwe mu Table 2.1 chifukwa zimadalira kwambiri mawonekedwe a fiber.

      Zindikirani 2.2: Kuonetsetsa kuti chiŵerengero cha G.657.A1 chiwongolero, zojambulazo ziyenera kuyendetsedwa bwino kuti fiber cut-off wavelength ikhale yoposa 1270 nm. Kutalika kwa chingwe kumayenera kuyesedwa ngati kutalika kwa fiber cutoff kuli kokulirapo kuposa 1300nm.