Menin aikuj ko ñan test fiber: Optical Power Meter eo — Etke ej aikuj in jerbal ñan kajjojo fiber link

Bwebwenato

Eprōl 15, 2020

Ilo fiber communications im photovoltaic system ko, aolep men rej pedped wōt ioon meram. Elañe juon signal emaron in bōk jimwe ej bedbed ion kajoor in mejen. Optical power meter (OPM) ej kein jerbal eo elaptata an bin ñan joñe joñan kajoor in signal eo — elañe ejelok, fiber link testing ej einwot am eñjake juon pulse ilo marok.

Optical Power Meter: Pedped eo moktata kin Fiber Testing

Ilo fiber communications im photovoltaic system ko, aolep signal transmission rej pedped wōt ioon meram. Im kajoor in meram eo ej lukkun kalikar elañe signal eo emaron in bōk jikin ilo jimwe. Optical power meter (OPM) ej kein jerbal eo elaptata an bin ñan joñe joñan kajoor in signal eo — elañe ejelok, fiber link testing ej einwot am kalibubu mejōm im guess.

Pedped eo elap ejjab bin: juon photodetector (ekkā an juon InGaAs ak germanium photodiode) ej ukōt signal ko an optical ñan signal ko an electrical, im circuitry eo ej ukōt men kein ñan power readings ko rej kwalok ilo dBm (decibel-milliwatts) ak μW (microwatts). dBm ej juon joñan: 0dBm = 1mW, -10dBm = 0.1mW, -30dBm = 0.001W. Aorōk in dBm ej bwe ej kōmman bwe en maroñ in riiti riit ko meñe kajur in optical ej lap an lap — juon fiber link ippāñ 0dBm kajur in jilkinlok im -25dBm kajur in bōk ewōr 25dB in attenuation, melelein 300 alen diklok an kajoor ilo receiver eo, ak kwalok einwot juon wōt oran: 25.

OPM ej juon men eo eaorōk jen an jab aikuj in kōmmane kinke ej jerbal jilu jerbal ko rejjab maroñ in dikļo k. Mokta, ej joñe joñan kajoor in transmit eo ñan kamool bwe meram eo ej jerbal ilo joñan eo ekkar. Kein karuo, ej joñe joñan maroñ in bōk jikin ñan kamool bwe signal eo ej bed ilōñ in joñan an maroñ in bōk melele. Kein kajilu, jolok men kein ruo ej bōktok link loss — metric eo elaptata an aorōk ñan lale joñan emman in fiber link eo. Ippān doon, jerbal kein jilu rej ejaake juon etale in ānbwin eo eweeppān an kajjojo fiber link.

Juon lemnok ebwid ej bwe OPM ko rej ñan laboratory ko wot. Ilo mol, ri jerbal ro rej kajerbali aolep raan — ñan bōk fiber backhaul ilo telecom base station ko, fiber interconnection testing ilo data center ko, im fiber communication link check ko ilo PV plant ko. PK56A ej kōmmane ñan an kajerbale ilo jikin kallib ko, im ej kōmman bwe en jimwe an laboratory-grade im an maroñ in bōk ilo pein.

Men ko relap: joñan joñan, joñan, im jimwe — ejelok emaron bōd

Ñe kwoj kālet juon OPM, jilu men ko rej aorōk. Jabdrewot juon ej bōd im tokjen test ko rejjab jimwe.

Mokta: joñan an to. Meram ilo fiber ejjab meram mouj — ej meram in laser ak LED ilo jet wavelength ko. Fiber communication wavelength ko rej 850nm (multimode), 1310nm (single-mode), 1550nm (single-mode), im 1625nm (ñan DWDM system testing). OPM eo ej aikuj in kalibwin ilo wavelength eo ejimwe档位 kinke detector eo ej oktak ibben wavelength eo — ejja detector eo wot emaron in ruo alen an sensitive ilo 850nm jen ilo 1550nm. Kōjerbal 850nm calibration curve ñan joñe 1550nm meram emaron kōmman bwe en 20% ak elaplok. PK56A ej jipan jiljilimjuon wavelength ko rej kalibubu 850nm ñan 1625nm, ej ekkar ñan wavelength ko an communication ko relap — ejelok wavelength mismatch ñan inebata kake ilo jikin eo.

Kein karuo: joñan kajoor. Joñan eo ej kwalok joñan an kajoor juon signal in meram eo OPM emaron joñe. Eļap an dik joñan an maroñ in kokkure detector eo kin meram eo ekajur; juon joñan eo elap ejjab maroñ in joñe meram eo edik. Field test optical power ekkā an tōpar -70dBm ñan +10dBm. -70dBm ej joñan eo ediktata an maroñ in bōk melele ko; +10dBm ej joñan meram eo elaptata. PK56A ej bōk -70dBm ñan +10dBm, ej ekkar ñan elaptata field scenaries ko.

Kein kajilu: jimwe. OPM precision ej kwalok einwot ±0.1dB ñan ±0.3dB. ±0.1dB ej melelen 2% bōd — premium grade. ±0.3dB ej melelen 7% bōd — ekkar ñan elaptata an engineering bōk. Jimwe ej aorōk kinke elañe juon OPM ewōr an ±0.3dB jimwe im engineering spec eo ej aikuj link loss error ilowaan ±0.5dB, OPM eo make ej bōk 60% in budget in error eo kar kōtlok, im likit jidik margin ñan link eo make.

PK56A: Juon kein jerbal ej kōmman aolep jerbal in test ko an fiber

Fiber testing ko etto rar aikuj elōn kein jerbal ko: juon OPM ñan kajoor, juon red-light pen ñan jikin bōd eo, im juon jikin meram ñan test signal injection. PK56A ej kobaik aolep jilu ilo juon wōt kein jibwe ilo pein, im aorōk eo an ej bwe en aolep ilo juon wōt.

PK56A ej juon OPM eo ej bōk jiljilimjuon wavelength ko im -70dBm ñan +10dBm joñan. Ijellokin men in, ewōr juon an meram emera (650nm) eo ej bōktok meram emera ilo fiber eo ikijen FC/UPC ak SC/UPC adapter ko. Meram eo emera ej jerbal ñan kōmman pija: ñe meram eo emera ej likūt ilo juon fiber, elañe ewōr juon rup ilo lukwon, meram eo emera ej diwōjtok ilo ien rup eo im ej walok ñan mej. Menin elap an emman ñan kōmman jorrāān ñan fiber jumper ko — ejelok aikuj in juon OTDR (optical time domain reflectometer, juon kein jerbal eo ej wōr tokjen joñoul thousand in yuan). Juon wōt PK56A ej mōkaj an kwalok elañe juon jumper emman.

PK56A ej barāinwōt jipan universal fiber interfaces. FC, SC, ST, LC, im kain interface ko jet rej jerbal ikijen oktak in adapter ko — ejelok aikuj in bar jenolok device ko ñan kajjojo kain interface. Ilo jikin jerbal eo, system ko reoktak rej kajerbal interface ko reoktak — SC ilo telecom, LC ilo data center ko, FC ilo CATV — im PK56A's multi-interface support ej melelen bwe juon wōt device ej kōmmane aolep scenario ko.

Ilo jerbal, PK56A ej kobaiktok tokjen ikijen an bin jerbal. Display eo an ej kwalok dBm im μW ilo juon wot ien, im ej kwalok elañe tokjen test eo ej bed ilo spec eo (PASS / WARNING / FAIL) — ejelok aikuj in lale tebōl ko. Ej kejbãrok tokjen test ko ñan keidi ibben data ko etto.

Emān bōd ko rej walok ilo ien mālijjon ko

Ilo jerbal in test fiber ilo jikin kallib, elōn bōd ko rej bar walok rej kōmman jorrāān ko rejjab aikuj. Meļeļe kaki ej bōbrae jorrāān ko remol. Bōd eo moktata ej jab lale joñan depakpak in wavelength eo mokta jen joñan. Einwot kar konono kake, OPM calibration curve ko rej oktak jen wavelength. Kōmman wavelength eo ebwid档位 ej kōmman bwe en diiklok riit ko jen 10% ñan 20%. Elōn rijerbal ro, ñan kōjparok jorrāān, rej kōjerbal ejja wavelength eo wōt ñan aolep joñan ko — men in emaron oktak 10% ñan 20% ñe rej joñan 1310nm im 1550nm single-mode fiber.

Bōd eo kein karuo ej kōjekdo̧o̧n erreo eo an fiber end-face. Bōtōktōk, oil, ak mōttan ko ilo fiber end-face (connector end-face) rej kōmman bwe en laplok an jako im reflection, im tokjen test ko remaroñ kōmman bwe end-face end-face en jorrāān einwot jorrāān ko an fiber link. Juon wāween eo epidodo ñan lale eok make: mokta jen am test, lale jemlokin mejān kin juon lens eo ej kalaplok. Elañe ettoon, karreo kin juon kein karreo im alcohol eo ejelok dren ie mokta jen am joñe. Elōñ 'link loss exceeds spec' likjab ko rej make kōmmane elikin karreo eo.

Bōd eo kein kajilu ej ​​test juon wōt fiber. Ilo juon fiber link, ewōr ruo fiber ko — juon ñan transmit (Tx), juon ñan bōk (Rx). Link loss emaron oktak ikõtan men kein ruo. Test juon wōt im bōk jemlok ko emaron likjab in walok abañ ko ibben eo juon. Wāween eo ejimwe ej ñan test erro jimor im keidi oktak in jorren eo. Elañe oktak eo ej laplok jen 3dB, juon fiber emaron wor an jorrāān, rup, ak jemlok.

Bōd eo kein kajilu ej ​​an jab maroñ in bōk melele in test ko. OPM data — jilkinlok kajoor, bōk kajoor, jako link — ej kōmmane “health record” eo an juon fiber link. Elañe data ko rejjab rekoote elikin test eo, ñe ej walok abañ ko kin link ko ilju jeklaj, ejelok ial in jella elañe “ekar emman mokta” ak “ekar wor abañ ko mokta.” Wãwen eo ejimwe ej ñan rekoote aolep melele ko elikin kajjojo test, archive ilo link number, kalek juon time-series test record.

Naan in kakapilōk ko rejimwe ñan kumi in bōk im kōjparok an engineering

Test in fiber eo elap ej etal jen baj joñan kajoor. Juon jerbal in bōk fiber link eo eobrak ej aikuj in koba: transmit-side power test (kōmeļeļeik bwe light source eo ej pād ilowaan spec eo), receive-side power test (kōmeļeļeik bwe signal eo ej pād ilōn̄in receiver sensitivity), link loss calculation (joļo̧k ruo im keidi ņae design value ko), fiber end-face inspection (erreo im m̧ool), im red-light verification (ruling ej m̧ōkaj an waļo̧k).

Ñe kwoj kālet kein jerbal in test ko, wōnan wōt ejjab aikuj in men eo ej kōmman bebe. Juon kein jerbal eo ewōr ippān OPM im red light source (āinwōt PK56A) edikļo̧k wōņāān, eļapļo̧k an lōke, im edikļo̧k an bōk iien jān wiaik juon OPM im red light pen kajjojo. Aorōk eo an juon kein jerbal einwot PK56A ejjab joñan jimwe — ej maroñ eo ñan kadedelok juon etale in fiber link ilo 10 minute ko jen am bōk jilu kein jerbal ko, ukōt jilu interface ko, im lale jilu tebōl ko.

Ri wia ro rej aikuj barāinwōt lale men ko rejjab lukkun alikar ilo kein wia ko: elañe kein jerbal eo ej jibañ data export (ñan kobaiktok ibben engineering management system ko); elañe fiber adapter ko rej kalibubu kain interface ko rej kajerbali ilo jikin jerbal eo; elañe wavelength ko reaitok (1625nm, ñan DW system out-of-band testing) rej rejetake; im elañe battery eo ej maroñ in jerbal ilo juon raan in jerbal. Meļeļe kein rej kwalok elañe kein jerbal eo ej lukkun jerbal ak ej meloklok ilo juon drawer. View the PV Test Instruments Collection