Sub-20 femtosecond inooneka chiedzatunable pulsed laser source
Nguva pfupi yadarika, timu yekutsvagisa kubva kuUK yakaburitsa chidzidzo chitsva, ichizivisa kuti vakabudirira kugadzira megawatt-level sub-20 femtosecond inooneka light tunable.pulsed laser source. Iyi pulsed laser sosi, ultrafastfiber lasersisitimu inokwanisa kugadzira mapulses ane tunable wavelengths, ultra-short durations, simba rinosvika makumi matatu nemapfumbamwe nanojoules, uye simba repamusoro rinopfuura 2 megawatts, kuvhura mhando-nyowani tarisiro yekushandiswa kweminda yakadai seye Ultrafast spectroscopy, biological imaging, uye maindasitiri kugadzirisa.
Chinonyanya kukosha cheiyi tekinoroji chiri mukubatanidzwa kwemaitiro maviri ekucheka-kumucheto: "Gain-Managed nonlinear Amplification (GMNA)" uye "Resonant Dispersive Wave (RDW) emission". Munguva yakapfuura, kuti uwane akadai epamusoro-kuita tunable ultrashshort pulses, inodhura uye yakaoma titanium-sapphire lasers kana optical parametric amplifiers yaiwanzodiwa. Midziyo iyi yaisangodhura chete, yakakura, uye yakaoma kuchengetedza, asi zvakare yakaganhurwa nereti yakaderera yekudzokorora uye mitsara yetuning. Iyo yese-fiber mhinduro yakagadziriswa panguva ino haingorerutsa zvakanyanya sisitimu yekuvaka asi zvakare inoderedza zvakanyanya mutengo uye kuoma. Inogonesa chizvarwa chakananga che-sub-20 femtosecond, inogoneka kusvika ku400 kusvika ku700 nanometers uye kupfuura epamusoro-simba pulses pakudzokororwa kwepamusoro frequency ye4.8 MHz. Chikwata chekutsvagisa chakawana budiriro iyi kuburikidza nemagadzirirwo akaitwa system. Chekutanga, vakashandisa yakazara polarization-kuchengetedza modhi-yakakiyiwa ytterbium fiber oscillator yakavakirwa paisina mutsara amplification mhete yegirazi (NALM) seyakabva mbeu. Iyi dhizaini haingoiti chete kugadzikana kwenguva refu kwehurongwa, asi zvakare inodzivirira dambudziko rekuora kwemuviri wakazara absorbers. Mushure mekutanga uye kudzvanywa kwepulse, mapurusi embeu anounzwa muchikamu cheGMNA. GMNA inoshandisa yega-phase modulation uye longitudinal asymmetric kuwana kugoverwa mumafiber optical kuti iwane spectral kuwedzera uye kugadzira ultrashort pulses ine inenge yakakwana mutsara chirp, iyo inozopedzisira yakatsikirirwa kune sub-40 femtoseconds kuburikidza ne grating peya. Munguva yechizvarwa cheRDW nhanho, vaongorori vakashandisa kuzvigadzira uye kugadzira mapfumbamwe-resonator anti-resonance hollow-core fibers. Rudzi urwu rwefiber optical rine kurasikirwa kwakanyanya mupombi pulse band uye nzvimbo inooneka yechiedza, zvichiita kuti simba rive rakashandurwa zvakanaka kubva papombi kuenda kune yakapararira wave uye kudzivisa kukanganisa kunokonzerwa ne-high-loss resonant band. Pasi pemamiriro akanyatsonaka, dispersion wave pulse energy inobuda nehurongwa inogona kusvika 39 nanojoules, iyo pfupi pfupi yekupuruzira hupamhi inogona kusvika 13 femtoseconds, simba repamusoro rinogona kunge rakareba kusvika 2.2 megawatts, uye simba rekushandura simba rinogona kusvika pa13%. Chinotonyanya kufadza ndechekuti nekugadzirisa gasi kudzvanywa uye fiber parameters, iyo sisitimu inogona kukwidziridzwa zviri nyore kune ultraviolet uye infrared mabhendi, kuwana wideband tuning kubva yakadzika ultraviolet kune infrared.
Tsvagiridzo iyi haina kukosha kwakakosha mundima yakakosha yephotonics, asi zvakare inovhura mamiriro matsva emaindasitiri nemashandisirwo eminda. Semuyenzaniso, muminda yakadai seyakawanda-photon microscopy imaging, yakanakisa nguva-yakagadziriswa spectroscopy, kugadzirisa zvinhu, chaiyo mushonga, uye Ultrafast nonlinear optics tsvagiridzo, iyi compact, inoshanda, uye yakaderera-inodhura mhando nyowani yeultrafast mwenje sosi ichapa vashandisi zvishandiso zvisati zvamboitika uye kuchinjika. Kunyanya mumamiriro ezvinhu anoda kudzokororwa kwakanyanya, simba repamusoro uye ultra-short pulses, tekinoroji iyi pasina mubvunzo ine makwikwi uye ine hukuru hwekusimudzira hunogona kuenzaniswa neyechinyakare titanium-sapphire kana optical parametric amplification masisitimu.
Mune ramangwana, boka rekutsvagisa rinoronga kuenderera mberi nekunatsiridza sisitimu, sekubatanidza dhizaini iripo iyo ine akawanda emahara-nzvimbo optical components mune optical fibers, kana kunyange kushandisa imwechete Mamyshev oscillator kutsiva ikozvino oscillator uye amplifier musanganiswa, kuitira kuti uwane iyo miniaturization uye kubatanidzwa kwehurongwa. Mukuwedzera, kuburikidza nekugadzirisa kune marudzi akasiyana-siyana e-anti-resonance fibers, kuunza Raman inoshanda gasi uye frequency doubling modules, iyi system inotarisirwa kuwedzerwa kune bhendi yakafara, ichipa zvose-fiber, wideband, ultrafast laser solutions yeminda yakawanda yakadai seultraviolet, chiedza chinooneka uye infrared.
Mufananidzo 1. Schematic diagram ye tuning ye pulsed laser
Nguva yekutumira: May-28-2025