Ukukhanya okubonakalayo kwe-Sub-20 femtosecondumthombo we-laser we-pulsed owenziweyo
Kutshanje, iqela lophando elivela e-UK lipapashe uphononongo olutsha, libhengeza ukuba baye baphuhlisa ngempumelelo i-megawatt-level sub-20 femtosecond ebonakalayo enokutyhutywa.umthombo we-laser wepulsed. Lo mthombo we-laser we-pulsed, i-ultrafastifayibha laserInkqubo iyakwazi ukuvelisa i-pulses kunye ne-wavelengths enqwenelekayo, ubude obufutshane kakhulu, amandla aphakamileyo njenge-nanojoules ye-39, kunye namandla aphezulu angaphezu kwe-2 megawatts, ukuvula amathuba okufaka isicelo esitsha kwiinkalo ezifana ne-ultrafast spectroscopy, i-biological imaging, kunye nokulungiswa kwemizi-mveliso.
Eyona nto iphambili yale teknoloji ixhomekeke ekudityaneni kweendlela ezimbini zokusika: "I-Gain-Managed nonlinear Amplification (GMNA)" kunye ne "Resonant Dispersive Wave (RDW) emission". Ngaphambili, ukufumana i-ultrashshort pulses esebenza kakhulu, i-laser ebiza kakhulu kunye neyinkimbinkimbi ye-titanium-sapphire okanye i-optical parametric amplifiers yayidla ngokufuneka. Ezi zixhobo bezingabizanga kuphela, zininzi, kwaye kunzima ukuzigcina, kodwa zikwanqunyelwe ngamaqondo aphantsi okuphindaphinda kunye noluhlu lokulungisa. Isisombululo se-fiber esiphuhlisiwe ngeli xesha asenzeli nje ngokulula i-architecture yenkqubo kodwa sinciphisa kakhulu iindleko kunye nobunzima. Ivumela ukuveliswa ngokuthe ngqo kwe-sub-20 ye-femtosecond, iguqulelwe kwi-400 ukuya kwi-nanometers ye-700 kwaye ngaphaya kwee-pulses zamandla aphezulu kwi-frequency ephindaphindayo ye-4.8 MHz. Iqela lophando liphumelele le mpumelelo ngoyilo lwenkqubo eyilwe ngokuchanekileyo. Okokuqala, basebenzise i-polarization-yokugcina imo evaliweyo i-ytterbium fiber oscillator esekwe kwisipili seringi sokukhulisa (NALM) njengomthombo wembewu. Olu luyilo aluqinisekisi kuphela ukuzinza kwexesha elide lenkqubo, kodwa kwakhona kuthintela ingxaki yokuthotywa kwe-absorber egcweleyo ngokomzimba. Emva kokwandiswa kwangaphambili kunye nokunyanzeliswa kwe-pulse, i-pulses yembewu ifakwe kwinqanaba le-GMNA. I-GMNA isebenzisa i-self-phase modulation kunye ne-longitudinal asymmetric gain distribution in optical fibers ukuphumeza ulwandiso lwe-spectral kunye nokuvelisa i-ultrashort pulses kunye ne-linear chirp ephantse igqibelele, ethi ekugqibeleni icinezelwe ukuya kwi-sub-40 femtoseconds ngokusebenzisa izibini zegrayiti. Ngexesha lenqanaba lesizukulwana se-RDW, abaphandi basebenzise i-self-designed kunye ne-nine-resonator anti-resonance hollow-core fibers. Olu hlobo lwefiber optical lunelahleko ephantsi kakhulu kwi-pump pulse band kunye nommandla wokukhanya obonakalayo, okwenza ukuba amandla aguqulwe ngokufanelekileyo ukusuka kumpompo ukuya kwi-wave edibeneyo kwaye ugweme ukuphazamiseka okubangelwa yi-high-loss resonant band. Ngaphantsi kweemeko ezifanelekileyo, i-dispersion wave pulse energy output yinkqubo inokufikelela kwi-nanojoules ye-39, ububanzi be-pulse obufutshane bunokufikelela kwi-13 femtoseconds, amandla aphezulu anokuba phezulu njenge-2.2 megawatts, kunye nokusebenza kokuguqulwa kwamandla kunokuba phezulu njenge-13%. Okuvuyisa ngakumbi kukuba ngokulungelelanisa uxinzelelo lwegesi kunye neeparamitha zefiber, inkqubo inokwandiswa ngokulula kwi-ultraviolet kunye neebhendi ze-infrared, ukufezekisa ukulungiswa kwe-wideband ukusuka kwi-ultraviolet enzulu ukuya kwi-infrared.
Olu phando alubambi kuphela ukubaluleka okubalulekileyo kwinkalo ye-photonics esisiseko, kodwa kwakhona ivula imeko entsha kwimizi-mveliso kunye nezicelo. Umzekelo, kumacandelo anje ngemifanekiso ye-microscope yeefoto ezininzi, i-spectroscopy esonjululwe lixesha elikhawulezayo, ukusetyenzwa kwezinto, iyeza elichanekileyo, kunye nophando lwe-optics olungenamda, olu cwecwe, olusebenzayo, nolunexabiso eliphantsi lomthombo wokukhanya okhawulezayo luya kubonelela abasebenzisi ngezixhobo ezingazange zibonwe ngaphambili kunye nokuguquguquka. Ngokukodwa kwiimeko ezifuna izinga eliphezulu lokuphindaphinda, amandla aphezulu kunye ne-ultra-short pulses, le teknoloji ikhuphisana ngokungathandabuzekiyo kwaye inamandla amakhulu okunyusa xa kuthelekiswa ne-titanium-sapphire yendabuko okanye i-optical parametric amplification systems.
Kwixesha elizayo, iqela lophando liceba ukuqhubela phambili nokuphucula inkqubo, njengokudibanisa i-architecture yangoku equkethe i-multiple-free-space optical components kwi-fiber optical, okanye nokusebenzisa i-oscillator eyodwa ye-Mamyshev ukuba ithathe indawo ye-oscillator yangoku kunye ne-amplifier indibaniselwano, ukwenzela ukufezekisa i-miniaturization kunye nokuhlanganiswa kwenkqubo. Ukongezelela, ngokulungelelanisa kwiintlobo ezahlukeneyo ze-anti-resonance fibers, ukwazisa i-Raman igesi esebenzayo kunye neemodyuli zokuphindaphinda kabini, le nkqubo kulindeleke ukuba yandiswe kwibhendi ebanzi, ibonelela nge-fiber yonke, i-wideband, i-ultrafast laser solutions kwiinkalo ezininzi ezifana ne-ultraviolet, ukukhanya okubonakalayo kunye ne-infrared.
Umzobo 1. Umzobo weSchematic we-tuning ye-laser pulsed
Ixesha lokuposa: May-28-2025