Tag nrho cov-fiber ib zaug-zaus DFB laser

Tag nrho cov fiber ib zaug xwbDFB laser

Kev tsim txoj kev pom kev

Lub wavelength nruab nrab ntawm lub laser fiber DFB ib txwm muaj yog 1550.16nm, thiab qhov piv txwv ntawm sab mus rau sab yog ntau dua 40dB. Muab hais tias qhov dav ntawm 20dB ntawm ib qhoDFB fiber laseryog 69.8kHz, nws tuaj yeem paub tias nws qhov dav ntawm kab 3dB yog 3.49kHz.

Kev piav qhia txog txoj kev kho qhov muag

1. Ib lub tshuab laser ib zaug xwb

Txoj kev kho qhov muag yog tsim los ntawm cov khoom siv kho qhov muag tsis zoo xws li 976 nm pumpedlaser, π -theem hloov grating, erbium-doped fiber, thiab wavelength division multiplexer. Lub hauv paus ntsiab lus ua haujlwm yog tias lub teeb twj tso kua mis tsim los ntawm 976 nm pumped laser yog tso tawm los ntawm lub twj tso kua mis tiv thaiv thiab faib ua ob txoj kev. 20% ntawm lub teeb twj tso kua mis hla dhau 980nm kawg ntawm 1550/980nm wavelength division multiplexer thiab nkag mus rau π -theem hloov grating. Lub teeb tso zis noob qhov chaw laser txuas nrog 1550 nm kawg ntawm 1550/980nm WDM tom qab dhau los ntawm lub fiber isolator. 80% ntawm lub teeb twj tso kua mis yog txuas nrog 1550/980 nm wavelength division multiplexer mus rau hauv 2 m erbium-doped gain fiber EDF rau kev sib pauv zog, ua tiav laser lub zog amplification.

Thaum kawg, cov zis laser tau ua tiav los ntawm ISO. Cov zis laser yog txuas nrog lub spectrometer (OSA) thiab lub zog optical meter (PM) rau kev saib xyuas cov zis laser spectrum thiab lub zog laser. Tag nrho cov khoom ntawm tag nrho lub cev txoj kev optical yog txuas nrog los ntawm lub fiber optic fusion splicer, ua tiav cov qauv fiber ntau optical system nrog lub qhov ntev ntawm kwv yees li 10 meters. Lub voj voog ntawm cov kab ntsuas qhov dav yog tsim los ntawm cov khoom siv hauv qab no: ob lub 3 dB optical fiber couplers, 50 km SM-28e ib hom optical fiber qeeb kab, 40 MHzacouste-optic modulator, thiab ib qholub tshuab ntes duabthiab lub tshuab ntsuas spectrum.

2. Cov cuab yeej tsis:

EDF: Qhov wavelength ua haujlwm yog nyob rau hauv C band, qhov aperture numerical yog 0.23, qhov absorption peak yog 1532 nm, tus nqi ib txwm yog 33 dB / m, thiab qhov welding poob yog 0.2 dB.

Tus tiv thaiv twj tso kua mis: Nws tuaj yeem muab kev tiv thaiv twj tso kua mis hauv 800 txog 2000 nm band, nrog rau qhov nruab nrab ntawm 976 nm thiab lub peev xwm tswj hwm fais fab ntawm 1 W.

Lub tshuab txuas fiber ntau optical: Nws ua tiav qhov kev faib tawm lossis kev sib xyaw ua ke ntawm lub zog teeb liab optical. 1 * 2 lub tshuab txuas fiber ntau optical, nrog qhov sib cais ntawm 20:80%, qhov ua haujlwm wavelength ntawm 976 nm, thiab ib hom.

Wavelength division multiplexer: Nws paub txog kev sib xyaw ua ke thiab kev faib ntawm ob lub teeb liab optical ntawm cov wavelengths sib txawv, 980/1550 nm WDM. Lub fiber ntawm qhov kawg ntawm lub twj tso kua mis yog Hi1060, thiab lub fiber ntawm qhov kawg thiab qhov kawg ntawm lub teeb liab yog SMF-28e.

Lub tshuab cais cov fiber ntau optical: Tiv thaiv lub teeb kom tsis txhob raug cuam tshuam los ntawm lub teeb rov qab, nrog lub wavelength ua haujlwm ntawm 1550 nm, bipolar isolator, thiab lub zog optical siab tshaj plaws ntawm 1W.