Yaqinda Xanchjou optik va go'zal mexanika instituti, Xitoy Fanlar va Texnologiyalar Instituti, CBEBAELELECRONIKA TEXNOLOGIYASI KO LTD . instituti, LTD . instituti ilmiy-tadqiqot instituti. "Opcic" xalqaro eng yaxshi optik jurnaliga va birinchi marta 9 mktektiv va yuqori darajadagi "Tats-yadroli tog 'jinsisklar" tubdan yasalgan pozlyuzion (ichi bo'sh yadro scf). Ushbu natija nafaqat yuqumli ravishda yuqumli lazer dasturlarini kengaytirish uchun o'rta infraqizill varaqli ultrofast pulslarining kamchiliklarini samarali echimini ta'minlaydi, ammo shuningdek, o'rtacha infraqizil lazer dasturlarini kengaytirish uchun asosdir
High-power mid-infrared ultrafast broadband light sources have important applications in advanced spectroscopy, material fine processing, medical surgery, and remote sensing. The limitations of laser transmission have hindered the further expansion of mid-infrared laser applications. In traditional transmission methods, the absorption of various gas molecules in the spatial optical path causes deformation of the output light spot and deterioration of pulse quality. Solid mid-infrared optical fiber has serious nonlinear accumulation, which causes serious distortion of the output time-frequency signal. To solve this problem, the research team used a self-made single-hole eight-ring structure Hollow-core PCF (length 5 m) to transmit mid-infrared ultrafast pulses. Thanks to the advantages of low transmission loss, low nonlinear effect accumulation and support for rapid vacuum extraction of Hollow-core PCF, the team not only solved the problems caused by traditional transmission methods, but also successfully achieved efficient transmission with an overall efficiency of >70%.
During the experiment, the experimenters used a self-built mid-infrared pulse fiber laser as the light source and a 5 m long Hollow-core PCF as the transmission medium. The two ends of the Hollow-core PCF were fixed in the air chamber so that the Hollow-core PCF could be evacuated using a vacuum pump. After the vacuum was drawn (the entire extraction process took less than 1 minute, and the gas pressure was drawn to ~10 mbar), the team successfully achieved an overall laser efficiency of > 70%, a Gaussian spot output that was close to the diffraction limit, and the entire system showed excellent stability. In addition, the spectral shape of the output in the frequency domain was basically consistent with the input. In the time domain, due to the small amount of waveguide dispersion of the hollow-core PCF (-2.04 fs2/mm @ 2.8 μm), the pulse width was widened from the input 117 fs to 404 fs. Subsequently, the experimenters added Ge and ZnSe positive dispersion materials to compensate for the negative dispersion introduced by the hollow-core PCF, coupling lens and air chamber window, and obtained an output with a pulse width of 98 fs (close to the transformation limit pulse width of 96 fs), with a peak power of 170 kW. In addition, the experimenters also used the autocorrelation trace to estimate that the output fundamental mode energy accounted for >95%.
Eksperimentchilar translyatsiya sxemasini bir xil uzunlikdagi suyuqlikli optik yo'l bilan solishtirishadi, natijada kamchilik flentid tolasida va aniq spektrni kesish va aniq spirtli qizil ranglar paydo bo'ladi, natijada ichi bo'sh asosiy afzalliklarga ega. O'rta issiqlik energiyasining o'rtadagi infruarllfastle iffilyatarl Lastripling-ning o'rta fidridliligi lazerini spektroskopiya, infrarmed Conmemease va masofadan boshqarish bo'yicha keng tarmoqli lazrumli lazerlik manbalariga erishdi. . ni sezish
Tegishli tadqiqotlar natijalari Lazerlar va Optoelektronika, "Loycy Crulce Crulcy Crocurcial tola", "Lincrice" kristalli tolasida "Lincrice Compry Cruls" ning "Chetering" in instituti va Xitoyning ilm-in institution tolasida "Chetchemame CRELUSS" ning "Chetchirma" va Xitoyning texnologiyasi bo'yicha ilmiy-tillar va Xitoyning eng yaxshi infuzaenti o'quvchisi Linke-ning "Chetchemame CRELUSS" Linke Infrident Commus-dagi Linke-ning "Xitoyda ilm-infulslar" va Xitoyning texnologiyasining qo'shma instituti va Xitoyning ilm-infulti va Texnologiyalar universitetida "Xitoyda giyohvand impulslar", "Xenejhou" ning ilg'or texnologiyalari instituti, Shanxay optikasi va go'zal mexanika doktori, "Xuang Jiageng" va Rassel Centerning "Xuang Jiageng" ning doktorantori Li Zeqing - "Xiang Xin" va "Rassel" markazi - {}}
Rasm 1. Eksperimental sozlash va natijalar . . Lince linzalari . linza, kof2 plando-konveks ob'ektivlari; JWP, yarim to'lqinli plastinka; QWP, chorak to'lqinli plastinka; FM, Bend oynasi; Fshir, taniqli infraqizil sprometr; AC, avtotoktaratori . (b) tola tuzilishi . . 5- metr uzunlikdagi insofe-ning nosozliklari Xollow-Core PCF . (E) 30 mm zent va 5 mm materiallardan foydalanish, 98 F yaqinida o'zgarishi cheklangan puls kengligi bilan 98 F ga teng bo'lgan puls chiqishi .
Rasm 2. .} (2}} ni (B) uzatmali optik yo'lning (yashil) va translyatsiya spektrini, to'g'ridan-to'g'ri option rusumli va translyatsiya spektrini (yashil rangdagi) uzatish spektri, to'g'ridan-to'g'ri optistlar va ichigrafiya pcf-ning translyatsiya spektri, to'g'ridan-to'g'ri option / translyatsiya spektrini (yashil rangdagi) uzatish spektrini (yashil rangdagi) uzatish spektri, to'g'ridan-to'g'ri option plitalari va ichi bo'sh yadrodan yasalgan sprissiya spektrimi Vakuum (qizil) . mkm . oralig'ida kattalashtirilgan spektrni ko'rsatadi (c) Raman Solitonning chap tomonida va avtohorreyr o'ng tomonda bo'ladi .
