Txhua-fiber ib zausDFB laser
Optical txoj kev tsim
Lub nruab nrab wavelength ntawm cov pa DFB fiber ntau laser yog 1550.16nm, thiab sab-rau-sab rejection piv yog ntau dua 40dB. Muab hais tias 20dB linewidth ntawm aDFB fiber ntau laseryog 69.8kHz, nws tuaj yeem paub tias nws 3dB kab dav yog 3.49kHz.
Optical path description
1. Ib zaus laser system
Txoj kev kho qhov muag yog tsim los ntawm passive optical Cheebtsam xws li 976 nm pumpedlaser, π -phase hloov grating, erbium-doped fiber ntau, thiab wavelength division multiplexer. Lub hauv paus ntsiab lus ntawm kev ua haujlwm yog tias lub teeb lub twj tso kua mis tsim los ntawm 976 nm pumped laser yog tso tawm los ntawm lub twj tso kua mis tiv thaiv thiab muab faib ua ob txoj hauv kev. 20%. Cov txiaj ntsig cov noob taum laser txuas nrog 1550 nm kawg ntawm 1550/980nm WDM tom qab dhau los ntawm fiber ntau cais. 80% ntawm lub teeb twj tso kua mis yog ua ke los ntawm 1550/980 nm wavelength division multiplexer rau hauv 2 m erbium-doped nce fiber ntau EDF rau kev sib pauv zog, ua tiav laser zog amplification.
Thaum kawg, cov zis laser tau ua tiav los ntawm ISO. Cov zis laser yog feem txuas nrog lub spectrometer (OSA) thiab lub ntsuas hluav taws xob kho qhov muag (PM) rau kev saib xyuas lub laser tso zis spectrum thiab lub zog laser. Tag nrho cov khoom ntawm tag nrho cov kab ke kho qhov muag tau txuas nrog fiber ntau optic fusion splicer, ua tiav cov txheej txheem kho qhov muag fiber ntau nrog cov kab noj hniav ntev li ntawm 10 meters. Lub voj ntawm kab dav ntsuas qhov system yog tsim los ntawm cov khoom siv hauv qab no: ob 3 dB optical fiber ntau txuas, 50 km SM-28e ib hom kab hluav taws xob kho qhov muag ncua, 40 MHz.acouste-optic modulator, as aphotodetectorthiab spectrum analyzer.
2. Ntaus Parameters:
EDF: Kev khiav hauj lwm wavelength yog nyob rau hauv C band, tus lej aperture yog 0.23, lub siab nqus yog 1532 nm, tus nqi raug yog 33 dB / m, thiab vuam poob yog 0.2 dB.
Lub twj tso kua mis tiv thaiv: Nws tuaj yeem muab kev tiv thaiv twj tso kua mis hauv 800 mus rau 2000 nm band, nrog lub nruab nrab wavelength ntawm 976 nm thiab lub zog tuav lub peev xwm ntawm 1 W.
Optical fiber ntau txuas: Nws paub txog kev faib lossis kev sib txuas ntawm lub teeb liab hluav taws xob. 1 * 2 optical fiber ntau txuas, nrog kev sib cais ntawm 20: 80%, ua haujlwm wavelength ntawm 976nm, thiab ib hom.
Wavelength division multiplexer: Nws paub txog kev sib xyaw ua ke thiab kev faib ntawm ob lub teeb pom kev sib txawv ntawm qhov sib txawv wavelengths, 980/1550 nm WDM. Cov fiber ntau ntawm lub twj tso kua mis kawg yog Hi1060, thiab fiber ntau ntawm qhov kawg thiab cov teeb liab kawg yog SMF-28e.
Optical fiber isolator: Tiv thaiv lub teeb ci los ntawm kev cuam tshuam los ntawm lub teeb pom kev rov qab, nrog kev ua haujlwm wavelength ntawm 1550nm, bipolar cais, thiab lub zog kho qhov muag siab tshaj plaws ntawm 1W.
Post lub sij hawm: Sep-08-2025