All-fiber single-frequency DFB laser

All-fiber single-frequencyDFB laser

Moqapi oa tsela ea Optical

Bophahamo bo bohareng ba leqhubu la laser e tloaelehileng ea DFB ke 1550.16nm, 'me tekanyo ea ho hana ka lehlakoreng le leng e kholo ho feta 40dB. Ka lebaka la hore bophara ba 20dB ba aDFB fiber laserke 69.8kHz, ho ka tsejoa hore bophara ba eona ba 3dB ke 3.49kHz.

Tlhaloso ea tsela ea Optical

1. Sistimi ea laser ea maqhubu a le mong

Tsela ea optical e entsoe ka likaroloana tsa "passive optical" tse kang 976 nm pumped.laser, π -phase shift grating, erbium-doped fiber, le wavelength division multiplexer. Molao-motheo oa ts'ebetso ke hore leseli la pompo le hlahisoang ke 976 nm pumped laser le hlahisoa ka mosireletsi oa pompo mme le arotsoe ka litsela tse peli. 20% ea khanya ea pompo e feta pheletsong ea 980nm ea 1550/980nm wavelength division multiplexer ebe e kena π -phase shift grating. Laser ea mohloli oa peo e hlahisoang e hokahane le pheletso ea 1550 nm ea 1550 / 980nm WDM ka mor'a hore e fete ka har'a fiber isolator. 80% ea leseli la pompo e kopantsoe ka 1550/980 nm wavelength division multiplexer ho 2 m erbium-doped gain fiber EDF bakeng sa phapanyetsano ea matla, ho finyella matla a laser ea matla.

Qetellong, tlhahiso ea laser e finyelloa ka ISO. Laser e hlahisoang ka ho latellana e hoketsoe ho spectrometer (OSA) le optical power meter (PM) bakeng sa ho beha leihlo spectrum ea laser output le matla a lesesa. Likarolo tsohle tsa tsela ea optical system kaofela li hokahantsoe ke fiber optic fusion splicer, e fihlelang sebopeho sa sistimi ea optical fiber e nang le bolelele ba limithara tse ka bang 10. Lulu ea sisteme ea tekanyo ea bophara ba mohala e entsoe ka lisebelisoa tse latelang: li-couplers tse peli tsa 3 dB optical fiber, mohala oa 50 km SM-28e single-mode optical fiber delay line, 40 MHz.acouste-optic modulator, mmoho le aphotodetectorle spectrum analyzer.

2. Litlhophiso tsa lisebelisoa:

EDF: Leqhubu la ho sebetsa le le sehlopheng sa C, palo ea palo ke 0.23, tlhōrō ea ho monya ke 1532 nm, boleng bo tloaelehileng ke 33 dB / m, 'me tahlehelo ea welding ke 0.2 dB.

Mosireletsi oa pompo: E ka fana ka ts'ireletso ea pompo sehlopheng sa 800 ho isa ho 2000 nm, ka bolelele bo bohareng ba 976 nm le matla a ho sebetsana le matla a 1 W.

Optical fiber coupler: E hlokomela kabo kapa motsoako oa matla a lets'oao la optical. 1 * 2 optical fiber coupler, e nang le karolelano e arohaneng ea 20:80%, bolelele ba ho sebetsa ba 976nm, le mokhoa o le mong.

Wavelength division multiplexer: E lemoha ho kopana le ho arohana ha lipontšo tse peli tsa optical tsa wavelengths tse fapaneng, 980/1550 nm WDM. Fiber e qetellong ea pompo ke Hi1060, 'me fiber qetellong e tloaelehileng le qetellong ea pontšo ke SMF-28e.

Optical fiber isolator: E thibela mohloli oa leseli hore o se ke oa angoa hampe ke khanya e bonts'itsoeng morao, e nang le leqhubu la ho sebetsa la 1550nm, bipolar isolator, le matla a phahameng a mahlo a 1W.