Ultra-yakakwirira kudzokorora mwero pulsed laser

Ultra-yakakwirira kudzokorora mwero pulsed laser

Munyika ine microscopic yekudyidzana pakati pechiedza uye nyaya, ekupedzisira-yakakwirira kudzokorora chiyero pulses (UHRPs) inoita sevatongi venguva chaiyo - vanotenderera kanopfuura bhiriyoni pasekondi (1GHz), vachitora zvigunwe zvemamolekyulu emasero egomarara mukufungidzira, kutakura huwandu hwe data mu optical fiber inobatanidza kutaurirana, uye nyeredzi inopenya. Kunyanya mukusvetuka kweyekuonekwa dimension ye lidar, terahertz yepamusoro-soro yekudzokorora chiyero pulsed lasers (100-300 GHz) iri kuita midziyo ine simba yekupinda mukati mekukanganisika layer, kuumbazve miganhu yemativi matatu-dimensional maonero ane spatiotemporal manipulation simba padanho rephoton. Parizvino, kushandisa artificial microstructures, senge micro-ring cavities inoda nanoscale processing accuracy kuti ibudise four-wave mixing (FWM), ndiyo imwe yenzira huru dzekuwana ultra-high repetition rate optical pulses. Masayendisiti ari kutarisa mukugadzirisa matambudziko einjiniya mukugadziriswa kweakanyanya-akapfava zvimiro, iyo frequency tuning dambudziko panguva yekutanga pulse, uye dambudziko rekushandurwa kwehunyanzvi mushure mekugadzirwa kwepulse. Imwe nzira ndeyekushandisa yakanyanya nonlinear fiber uye kushandisa modulation instability mhedzisiro kana FWM mhedzisiro mukati me laser cavity kufadza UHRPs. Kusvika parizvino, isu tichiri kuda yakawedzera dexterous "nguva shaper".

Maitiro ekugadzira UHRP nekubaya ultrafast pulses kuti inakidze iyo dissipative FWM mhedzisiro inotsanangurwa se "ultrafast ignition". Yakasiyana neyakatsanangurwa pamusoro apa artificial microring cavity scheme inoda kuramba ichipomba, kurongeka kwakaringana kwekudzora pulse chizvarwa, uye kushandiswa kweakanyanya nonlinear midhiya kudzikisa chikumbaridzo cheFWM, "kupisa" uku kunoenderana nepamusoro pesimba maitiro ekupedzisira pulses kuti afadze zvakananga FWMtion, uye mushure me "kuregedza Achibudirira".

Mufananidzo 1 unoratidza iyo yakakosha nzira yekuwana pulse self-organization yakavakirwa pane ultrafast seed pulse excitation ye dissipative fiber ring cavities. Iyo yekunze injected ultrashort seed pulse (nguva T0, repetition frequency F) inoshanda se "ignition source" kuti ifadze nzvimbo ine simba guru rekupuruzira mukati megomba rekuparara. Iyo intracellular gain module inoshanda mu synergy ne spectral shaper kushandura mhodzi pulse simba kuita muzinga wakaita muzinga we spectral response kuburikidza nejoint regulation in the time-frequency domain. Iyi nzira inoputika kuburikidza nemiganhu yechinyakare inoramba ichipomba: iyo mhodzi yemhodzi inovhara kana yasvika pakuparara kweFWM pachikumbaridzo, uye disipation cavity inochengetedza iyo yega-yakarongeka mamiriro ekuputika kuburikidza nechiyero chesimba chekuwana nekurasikirwa, nekuputika kwekudzokorora frequency iri Fs (inoenderana neiyo intrinsic yenguva uye T frequency).

Chidzidzo ichi chakaitawo ongororo yedzidziso. Kubva pamatanho anogamuchirwa muyedzo yekuseta uye ine 1psUltrafast pulse lasersemunda wekutanga, simulation yenhamba yakaitwa pane evolution process ye pulse's time domain uye frequency mukati me laser cavity. Zvakaonekwa kuti kupuruzira kwakapinda nematanho matatu: pulse splitting, pulse periodic oscillation, uye pulse yunifomu kugovera mukati mese laser cavity. Ichi chigumisiro chenhamba chinosimbisawo zvizere maitiro ekuzvironga epulse laser.

Nekukonzeresa iyo mana-wave kusanganisa maitiro mukati me dissipative fiber ring cavity kuburikidza neultrafast seed pulse ignition, chizvarwa chinozvironga uye kuchengetedza sub-THZ yekupedzisira-yepamusoro yekudzokorora frequency pulses (yakagadzikana kubuda kwe0.5W simba mushure membeu kudzima) zvakabudirira kubudirira, zvichipa iyo nyowani yemhando yechiedza Zque sosi: Iyo inosimudzira iyo sub-THZ danho renzvimbo yemwenje cloud resolution kusvika padanho remamilimita. Iyo pulse self-sustaining feature inoderedza zvakanyanya kushandiswa kwesimba rehurongwa. Iyo yose-fiber chimiro inovimbisa kugadzikana kwakanyanya kushanda mu1.5 μm bhendi rekuchengetedza ziso. Tichitarisa kune ramangwana, teknolojia iyi inotarisirwa kutyaira kushanduka kwemotokari-yakaiswa lidar kune miniaturization (yakabva paMZI micro-filters) uye kuona kwenguva refu (kuwedzera kwesimba kusvika> 1W), uye kuwedzera kuenderana nezvinodiwa zvekuona kwemamiriro ezvinhu akaoma kuburikidza ne-multi-wavelength coordinated ignition uye mutemo wakangwara.