Ukubuka konke kwama-modulators amane avamile

Ukubuka konke kwama-modulators amane avamile

Leli phepha lethula izindlela ezine zokuguquguquka (ukushintsha ubukhulu be-laser kusizinda sesikhathi se-nanosecond noma se-subnanosecond) ezisetshenziswa kakhulu ezinhlelweni ze-fiber laser. Lezi zifaka phakathi i-AOM (ukuguquguquka kwe-acousto-optic), i-EOM (ukuguquguquka kwe-electro-optic), i-SOM/I-SOA(ukukhuliswa kokukhanya kwe-semiconductor okwaziwa nangokuthi i-semiconductor modulation), kanyeukuguqulwa kwe-laser okuqondilePhakathi kwabo, i-AOM,I-EOM,I-SOM ingeye-modulation yangaphandle, noma i-modulation engaqondile.

1. I-Acousto-optic Modulator (AOM)

Ukuguqulwa kwe-Acousto-optic kuyinqubo ebonakalayo esebenzisa umphumela we-acousto-optic ukulayisha ulwazi ku-optical carrier. Lapho kuguqulwa, isignali kagesi (ukuguqulwa kwe-amplitude) kuqala kufakwa ku-electro-acoustic transducer, eguqula isignali kagesi ibe yinsimu ye-ultrasonic. Lapho igagasi lokukhanya lidlula ku-acousto-optic medium, i-optical carrier iyaguqulwa futhi iba ulwazi oluthwala amagagasi oluguquliwe ngenxa yesenzo se-acousto-optic.

2. I-Electro-optical Modulator(EOM)

I-modulator ye-electro-optical iyi-modulator esebenzisa imiphumela ye-electro-optical yamakristalu athile e-electro-optical, njengekristalu ye-lithium niobate (LiNb03), amakristalu e-GaAs (GaAs) kanye namakristalu e-lithium tantalate (LiTa03). Umphumela we-electro-optical ukuthi lapho i-voltage isetshenziswa kukristalu ye-electro-optical, inkomba yokukhanya kwekristalu ye-electro-optical izoshintsha, okuholela ekushintsheni kwezici zamagagasi okukhanya kwekristalu, kanye nokuguqulwa kwesigaba, ubukhulu, ukuqina kanye nesimo se-polarization sesignali ye-optical kuyabonakala.

Umfanekiso: Ukucushwa okuvamile kwesekethe yomshayeli we-EOM

3. I-Semiconductor Optical Modulator/I-Semiconductor optical amplifier (i-SOM/i-SOA)

I-amplifier ye-semiconductor optical (i-SOA) ivame ukusetshenziselwa ukukhulisa isignali ye-optical, enezinzuzo ze-chip, ukusetshenziswa kwamandla aphansi, ukwesekwa kwawo wonke ama-band, njll., futhi iyindlela ehlukile yesikhathi esizayo kune-amplifier ye-optical yendabuko njenge-EDFA (Isikhulisi sefayibha esifakwe i-Erbium). I-modulator ye-semiconductor optical (i-SOM) iyidivayisi efanayo ne-amplifier ye-semiconductor optical, kodwa indlela esetshenziswa ngayo ihlukile kancane endleleni esetshenziswa ngayo ne-amplifier yendabuko ye-SOA, futhi izinkomba ezigxila kuzo lapho zisetshenziswa njenge-modulator yokukhanya zihlukile kancane kulezo ezisetshenziswa njenge-amplifier. Uma isetshenziselwa ukukhulisa isignali ye-optical, ugesi wokushayela ozinzile uvame ukunikezwa i-SOA ukuqinisekisa ukuthi i-SOA isebenza esifundeni esiqondile; Uma isetshenziselwa ukuqondisa ama-pulse e-optical, ifaka amasignali e-optical aqhubekayo ku-SOA, isebenzisa ama-pulse kagesi ukulawula ugesi we-SOA drive, bese ilawula isimo sokukhipha i-SOA njengokukhulisa/ukunciphisa. Isebenzisa izici zokukhulisa kanye nokunciphisa i-SOA, le ndlela yokuguqula isetshenziswe kancane kancane kwezinye izinhlelo zokusebenza ezintsha, njengokuzwa kwe-fiber optical, i-LiDAR, i-OCT medical imaging kanye nezinye izinkambu. Ikakhulukazi kwezinye izimo ezidinga ivolumu ephezulu, ukusetshenziswa kwamandla kanye nesilinganiso sokuphela.

4. Ukuguqulwa kwe-laser direct kungaguqula isignali yokukhanya ngokulawula ngqo i-laser bias current, njengoba kuboniswe esithombeni esingezansi, ububanzi be-pulse ye-nanosecond ezintathu butholakala ngokuguqulwa kwe-direct. Kungabonakala ukuthi kukhona i-spike ekuqaleni kwe-pulse, ebangelwa ukukhululeka kwe-laser carrier. Uma ufuna ukuthola i-pulse ye-picoseconds engaba yi-100, ungasebenzisa le spike. Kodwa ngokuvamile asifuni ukuba nale spike.

Fingqa

I-AOM ifaneleka ekukhishweni kwamandla okukhanya ngama-watts ambalwa futhi inomsebenzi wokushintsha imvamisa. I-EOM iyashesha, kodwa ubunzima bokushayela buphezulu kanti isilinganiso sokuphela siphansi. I-SOM (SOA) iyisisombululo esifanele sejubane le-GHz kanye nesilinganiso sokuphela esiphezulu, ngokusetshenziswa kwamandla okuphansi, i-miniaturization nezinye izici. Ama-diode e-laser aqondile ayisisombululo esishibhile, kodwa qaphela izinguquko ezicini ze-spectral. Uhlelo ngalunye lokuguqulwa kwe-modulation lunezinzuzo nezinkinga zalo, futhi kubalulekile ukuqonda ngokunembile izidingo zohlelo lokusebenza lapho ukhetha uhlelo, futhi ujwayelane nezinzuzo nezinkinga zesimiso ngasinye, bese ukhetha uhlelo olufanele kakhulu. Isibonelo, ekuzweleni kwefayibha esakazwayo, i-AOM yendabuko iyona eyinhloko, kodwa kwezinye imiklamo yesistimu entsha, ukusetshenziswa kwezinhlelo ze-SOA kukhula ngokushesha, kwezinye izinhlelo zendabuko ze-wind liDAR zisebenzisa i-AOM enezigaba ezimbili, ukwakheka kwesimiso esisha ukuze kuncishiswe izindleko, kuncishiswe usayizi, futhi kuthuthukiswe isilinganiso sokuphela, uhlelo lwe-SOA luyamukelwa. Ohlelweni lokuxhumana, uhlelo lwesivinini esiphansi luvame ukusebenzisa uhlelo lokuguqulwa oluqondile, kanti uhlelo lwesivinini esikhulu luvame ukusebenzisa uhlelo lokuguqulwa kwe-electro-optic.