Isantya esiphezulu sokuphindaphinda i-laser ye-pulsed

Isantya esiphezulu sokuphindaphinda i-laser ye-pulsed

Kwihlabathi le-microscopic yonxibelelwano phakathi kokukhanya kunye nomcimbi, i-ultra-high repetition rate rate pulses (UHRPs) isebenza njengabalawuli bexesha-zijikeleza ngaphezu kwewaka lebhiliyoni ngomzuzwana (1GHz), zithatha iminwe yemolekyuli yeeseli zomhlaza kwintelekelelo ye-spectral, ephethe isixa esikhulu sedatha kunxibelelwano lwefiber optical optical kunxibelelanisa i-telescolith ejikelezayo. Ngokukodwa kwi-leap of the dimension dimension ye-lidar, i-terahertz i-ultra-high repetition rate i-pulsed lasers (i-100-300 GHz) iba zizixhobo ezinamandla zokungena kwi-interference layer, ilungisa kwakhona imida ye-dimensional perception kunye ne-spatiotemporal manipulation amandla kwinqanaba le-photon. Okwangoku, ukusebenzisa i-microstructures eyenziweyo, njenge-micro-ring cavities efuna ukuchaneka kwe-nanoscale processing ukuvelisa ukuxuba kwamaza amane (FWM), yenye yeendlela eziphambili zokufumana i-ultra-high repetition rate optical pulses. Izazinzulu zigxile ekusombululeni iingxaki zobunjineli ekusetyenzweni kolwakhiwo lwe-ultra-fine, ingxaki yokulungiswa rhoqo ngexesha lokuqaliswa kwe-pulse, kunye nengxaki yoguqulo olusebenzayo emva kokwenziwa kwe-pulse. Enye indlela kukusebenzisa iifiber ezingenakulinganiswa kunye nokusebenzisa i-modulation instability effect okanye i-FWM effect ngaphakathi kwe-laser cavity ukuvuyisa i-UHRPs. Ukuza kuthi ga ngoku, sisafuna "ixesha lokubumba" elibukhali ngakumbi.

Inkqubo yokuvelisa i-UHRP ngokufaka i-ultrafast pulses ukuze ivuse i-dissipative FWM effect ichazwa ngokuthi "i-ultrafast ignition". Ukwahluke kwiskimu esichazwe ngasentla sokwenziwa kwe-microring cavity scheme efuna ukumpompa okuqhubekayo, ukulungiswa okuchanekileyo kwe-detuning ukulawula ukuveliswa kwe-pulse, kunye nokusetyenziswa kweendaba ezingabonakaliyo kakhulu zokunciphisa umda we-FWM, oku "kutsha" kuxhomekeke kwiimpawu zamandla eziphakamileyo ze-ultrafast pulses ukuze zivuse ngokuthe ngqo i-FWMtion, kwaye emva kokuba "ukucima i-AchiveHRP".

Umzobo woku-1 ubonisa indlela engundoqo yokuphumeza ukuzilungelelanisa kwe-pulse ngokusekwe kwi-ultrafast seed pulse excitation ye-dissipative fibre ring cavities. I-ultrashort seed pulse efakwe ngaphandle (ixesha le-T0, i-repetition frequency F) isebenza "njengomthombo wokutshisa" ukuvuyisa i-high-power pulse field ngaphakathi kwendawo yokulahla. Imodyuli yokuzuza kwe-intracellular isebenza ngokubambisana kunye ne-spectral shaper ukuguqula amandla e-pulse yembewu ibe yimpendulo ye-spectral efana ne-comb ngokusebenzisa umgaqo odibeneyo kwi-domain-frequency domain. Le nkqubo iphula imida yokumpompa ngokuqhubekayo kwendabuko: i-pulse yembewu iyavala xa ifikelela kwi-disipation FWM threshold, kwaye i-disipation cavity igcina i-self-organizating state of pulse ngokusebenzisa ibhalansi eguquguqukayo yokuzuza kunye nelahleko, kunye nokuphindaphinda kwe-pulse frequency yi-Fs (ehambelana ne-intrinsic cavity kunye ne-T frequency).

Olu phononongo luphinde lwenze ungqinisiso lwethiyori. Ngokusekwe kwiiparamitha ezamkelwe kwiseto yovavanyo kunye ne-1psi-ultrafast pulse lasernjengentsimi yokuqala, ukulinganisa kwamanani kwenziwa kwinkqubo yenguqu yedomeyini yexesha le-pulse kunye nokuphindaphinda ngaphakathi kwendawo ye-laser. Kwafunyaniswa ukuba i-pulse idlule kwizigaba ezithathu: i-pulse splitting, i-pulse periodic oscillation, kunye ne-pulse uniform distribution kuyo yonke i-laser cavity. Esi siphumo samanani siqinisekisa ngokupheleleyo iimpawu zokuzicwangcisaipulse laser.

Ngokubangela isiphumo sokuxuba amaza amaza amane ngaphakathi kwindandatho ye-fiber ye-dissipative ngokusebenzisa i-ultrafast seed pulse ignition, isizukulwana esizilungiselelayo kunye nokugcinwa kwe-sub-THZ ephezulu yokuphindaphinda i-pulses (imveliso ezinzileyo ye-0.5W yamandla emva kokucima imbewu) ifezekisiwe ngempumelelo, inika uhlobo olutsha lwendawo yokukhanya kwe-ZT: isisombululo selifu ukuya kwinqanaba le-millimeter. I-pulse self-standing feature inciphisa kakhulu ukusetyenziswa kwamandla enkqubo. Isakhiwo se-fiber yonke siqinisekisa ukusebenza kokuzinza okuphezulu kwi-1.5 μm yokhuseleko lwamehlo. Ukujonga kwixesha elizayo, le teknoloji ilindeleke ukuba iqhube ukuguquka kwe-lidar-mounted lidar ngokubhekiselele kwi-miniaturization (esekelwe kwi-MZI micro-filters) kunye nokufumanisa ixesha elide (ukwandiswa kwamandla ukuya> 1W), kunye nokulungelelanisa ngakumbi iimfuno zombono weendawo eziyinkimbinkimbi ngokusebenzisa ukutshatyalaliswa kokulungelelaniswa kwamaza amaninzi kunye nokulawulwa kwengqondo.