Laser ya DFB yamtundu umodzi wamtundu uliwonse

Zonse-fiber single-frequencyDFB laser

Optical njira kupanga

Kutalika kwapakati kwa DFB fiber laser wamba ndi 1550.16nm, ndipo kukana mbali ndi mbali ndikokulirapo kuposa 40dB. Popeza kuti 20dB linewidth ya aDFB CHIKWANGWANI laserndi 69.8kHz, zitha kudziwika kuti mzere wake wa 3dB ndi 3.49kHz.

Kufotokozera kwa njira ya Optical

1. Single-frequency laser system

Njira yowonera imapangidwa ndi zinthu zowoneka bwino monga 976 nm kupopera.laser, π -phase shift grating, erbium-doped fiber, ndi wavelength division multiplexer. Mfundo yogwirira ntchito ndikuti kuwala kwapampu kopangidwa ndi 976 nm pumped laser kumatuluka kudzera pachitetezo cha pampu ndikugawidwa m'njira ziwiri. 20% ya kuwala kwa mpope kumadutsa kumapeto kwa 980nm kwa 1550/980nm wavelength division multiplexer ndikulowa mu π -phase shift grating. Laser yotulutsa mbewu imalumikizidwa ndi 1550 nm kumapeto kwa 1550/980nm WDM pambuyo podutsa pa chopatula cha fiber. 80% ya nyali ya mpope imaphatikizidwa ndi 1550/980 nm wavelength division multiplexer kukhala 2 m erbium-doped gain fiber EDF pakusinthana ndi mphamvu, kukwaniritsa kukulitsa mphamvu ya laser.

Pomaliza, kutulutsa kwa laser kumatheka kudzera mu ISO. Laser yotulutsa imalumikizidwa ndi spectrometer (OSA) ndi mita yamagetsi yamagetsi (PM) yowunikira kutulutsa kwa laser ndi mphamvu ya laser. Zigawo zonse za dongosolo lonse la optical path zimalumikizidwa ndi fiber optic fusion splicer, zomwe zimakwaniritsa mawonekedwe amtundu wa fiber optical ndi kutalika kwa pafupifupi 10 metres. Njira yoyezera m'lifupi mwake imapangidwa ndi zida izi: ma 3 dB optical fiber couplers, 50 km SM-28e single-mode fiber optical delay line, 40 MHz.acouste-optic modulator, komanso aPhotodetectorndi spectrum analyzer.

2. Zosintha pazida:

EDF: Kutalika kwa mafunde ali mu C band, kabowo ka manambala ndi 0.23, nsonga ya mayamwidwe ndi 1532 nm, mtengo wake ndi 33 dB/m, ndipo kuwotcherera ndi 0.2 dB.

Chitetezo cha pampu: Itha kupereka chitetezo cha pampu mu bandi ya 800 mpaka 2000 nm, yokhala ndi kutalika kwapakati kwa 976 nm komanso mphamvu yogwira 1 W.

Optical fiber coupler: Imazindikira kugawa kapena kuphatikizika kwa mphamvu yamawu. 1 * 2 optical fiber coupler, yokhala ndi chiŵerengero chogawanika cha 20:80%, kutalika kwa 976nm, ndi single-mode.

Wavelength division multiplexer: Imazindikira kuphatikiza ndi kugawanika kwa ma siginecha awiri owoneka amitundu yosiyanasiyana, 980/1550 nm WDM. Ulusi kumapeto kwa mpope ndi Hi1060, ndipo CHIKWANGWANI pamapeto wamba ndi chizindikiro mapeto ndi SMF-28e.

Optical fiber isolator: Imalepheretsa gwero la kuwala kuti lisasokonezedwe ndi kuwala kobwerera kumbuyo, ndi kutalika kwa mawonekedwe a 1550nm, bipolar isolator, ndi mphamvu yayikulu kwambiri ya 1W.