Ilaser ye-DFB enefayibha enye ephindaphindayo

I-frequency enye yefayibha yonkeI-laser ye-DFB

Uyilo lwendlela ebonakalayo

Ubude bomda obuphakathi be-laser yefayibha ye-DFB eqhelekileyo yi-1550.16nm, kwaye umlinganiselo wokulahlwa kwecala ukuya kwelinye icala mkhulu kune-40dB. Ngenxa yokuba ububanzi bomgca we-20dB we-aI-laser yefayibha ye-DFByi-69.8kHz, kuyaziwa ukuba ububanzi bomgca wayo we-3dB yi-3.49kHz.

Inkcazo yendlela ebonakalayo

1. Inkqubo yelaser ye-single-frequency

Indlela ye-optical yenziwe ngamacandelo e-optical angasebenziyo afana ne-976 nm epompelweyoileza, i-π-phase shift grating, i-erbium-doped fiber, kunye ne-wavelength division multiplexer. Umgaqo osebenzayo kukuba ukukhanya kwepompo okuveliswa yi-976 nm pumped laser kuphuma nge-pump protector kwaye kwahlulwe ngeendlela ezimbini. I-20% yokukhanya kwepompo idlula kwisiphelo se-980nm se-1550/980nm wavelength division multiplexer kwaye ingena kwi-π-phase shift grating. I-output seed source laser iqhagamshelwe kwisiphelo se-1550 nm se-1550/980nm WDM emva kokudlula kwi-fiber isolator. I-80% yokukhanya kwepompo idityaniswe nge-1550/980 nm wavelength division multiplexer kwi-2 m erbium-doped gain fiber EDF yokutshintshiselana ngamandla, okufezekisa ukwandiswa kwamandla e-laser.

Okokugqibela, imveliso yelaser ifumaneka nge-ISO. I-output laser iqhagamshelwe kwi-spectrometer (OSA) kunye ne-optical power meter (PM) ngokulandelelanayo ukuze kujongwe i-laser output spectrum kunye namandla elaser. Zonke izinto zendlela ye-optical yenkqubo yonke ziqhagamshelwe yi-fiber optic fusion splicer, nto leyo efikelela kwisakhiwo senkqubo ye-fiber optic ngokupheleleyo esinobude be-cavity obumalunga neemitha ezili-10. I-loop yenkqubo yokulinganisa ububanzi bomgca yenziwe ngezi zixhobo zilandelayo: ii-couplers ezimbini ze-3 dB optical fiber, umgca wokulibaziseka we-50 km SM-28e single-mode fiber delay line, i-40 MHz.i-modulator ye-acouste-optic, kunye neisixhobo sokubona iifotokunye ne-spectrum analyzer.

2. Iiparameter zesixhobo:

I-EDF: Ububanzi bomda obusebenzayo bukwibhendi ye-C, umngxuma wenombolo yi-0.23, incochoyi yokufunxa yi-1532 nm, ixabiso eliqhelekileyo yi-33 dB/m, kwaye ilahleko yokuwelda yi-0.2 dB.

Isikhuselo sempompo: Singabonelela ngokhuseleko lwempompo kwibhendi ye-800 ukuya kwi-2000 nm, enobude obuphakathi be-976 nm kunye nomthamo wokuphatha amandla we-1 W.

Isixhumi sefayibha yokubona: Sikwazi ukusasazwa okanye ukudityaniswa kwamandla esignali yokubona. Isixhumi sefayibha yokubona esiyi-1*2, esinomlinganiselo wokuqhekeka we-20:80%, ubude bomda obusebenzayo be-976nm, kunye nemowudi enye.

I-multiplexer yokwahlulahlula amaza: Ifezekisa indibaniselwano kunye nokwahlulahlula kwemiqondiso emibini ye-optical yee-wavelengths ezahlukeneyo, i-980/1550 nm WDM. Ifayibha ekwisiphelo sepompo yi-Hi1060, kwaye ifayibha ekwisiphelo esiqhelekileyo kunye nesiphelo sesignali yi-SMF-28e.

I-optical fiber isolator: Ithintela umthombo wokukhanya ukuba ungachaphazeleki kakubi kukukhanya okubuyisiweyo ngasemva, kunye nobude bomda obusebenzayo be-1550nm, i-bipolar isolator, kunye namandla aphezulu e-optical e-1W.