Njira yopangira ma lasers a rectangular pulsed

Optical njira kapangidwe ka makona anayilasers pulsed

Chidule cha kapangidwe ka njira ya Optical

Makina otsekeka otsekeka awiri-wavelength dissipative soliton resonant thulium-doped fiber laser yochokera pagalasi la mphete zopanda mzere.

2. Kufotokozera njira

Mafunde apawiri-wavelength dissipative soliton resonant thulium-dopedlaser fiberimatengera kamangidwe ka "8" kooneka ngati kabowo (Chithunzi 1).

Mbali yakumanzere ndi gawo lalikulu la unidirectional loop, pomwe mbali yakumanja ndi mawonekedwe agalasi owoneka bwino a fiber loop. Kumanzere kwa unidirectional loop kumaphatikizapo chogawanitsa, 2.7m thulium-doped optical fiber (SM-TDF-10P130-HE), ndi 2 μm band optical fiber coupler yokhala ndi coefficient ya 90:10. Isolator imodzi yodalira polarization (PDI), Polarization Controllers (Polarization controller: PC), 0.41m Polarization-maintenance Fiber (PMF). Kapangidwe kagalasi ka mphete ka fiber optic kumanja kumatheka polumikiza kuwala kuchokera kumanzere kwa unidirectional loop kupita ku kalirole wa mphete wopanda linear wa fiber optic kumanja kudzera pa 2 × 2 kapangidwe ka Optical coupler yokhala ndi coefficient of 90:10. Kapangidwe kagalasi kakang'ono ka fiber optical kumanja kumaphatikizapo 75-metres optical fiber (SMF-28e) ndi polarization controller. 75-mita single-mode kuwala CHIKWANGWANI ntchito kupititsa patsogolo zotsatira nonlinear. Apa, 90:10 optical fiber coupler amagwiritsidwa ntchito kuti awonjezere kusiyana kwa gawo lopanda mzere pakati pa kufalikira kwa mawotchi ndi mawotchi. Kutalika konse kwa mawonekedwe amitundu iwiri-wavelength ndi 89.5 metres. Poyeserera uku, nyali ya mpope imadutsa kaye pa chophatikizira chamtengo kuti ifike pakatikati pa thulium-doped optical fiber. Pambuyo pa thulium-doped optical fiber, 90:10 coupler imalumikizidwa kuti iyendetse 90% ya mphamvu mkati mwa patsekeke ndikutumiza 10% ya mphamvu kunja kwa patsekeke. Nthawi yomweyo, fyuluta ya birefringent ya Lyot imapangidwa ndi polarization-intaining optical fiber yomwe ili pakati pa owongolera polarization ndi polarizer, yomwe imathandizira kusefa mafunde a spectral.

3. Chidziwitso chambiri

Pakalipano, pali njira ziwiri zowonjezerera mphamvu za pulsed lasers. Njira imodzi ndiyo kuchepetsa mwachindunji zotsatira zopanda malire, kuphatikizapo kuchepetsa mphamvu yapamwamba ya pulses kudzera m'njira zosiyanasiyana, monga kugwiritsa ntchito kasamalidwe ka kubalalitsidwa kwa ma pulses otambasuka, ma oscillator akuluakulu a chirped, ndi lasers-splitting pulsed lasers, ndi zina zotero. Njira tatchulazi akhoza bwinobwino kukulitsa zimachitika mphamvu yalaser pulsedmpaka makumi a nanojoules. Dissipative soliton resonance (Dissipative soliton resonance: DSR) ndi njira yopangira mphamvu yamakona anayi yomwe idaperekedwa koyamba ndi N. Akhmediev et al. mu 2008. Makhalidwe a dissipative soliton resonance zimachitika ndi kuti, pamene kusunga matalikidwe mosalekeza, zimachitika m'lifupi ndi mphamvu ya sanali yoweyula splitting amakona anayi zimachitika kuwonjezeka monotonically ndi kuwonjezeka mpope mphamvu. Izi, kumlingo wina, zimadutsa malire a chiphunzitso chachikhalidwe cha soliton pa mphamvu ya single-pulse mphamvu. Dissipative soliton resonance imatha kupezedwa popanga mayamwidwe odzaza ndikusintha mayamwidwe odzaza, monga nonlinear polarization rotation effect (NPR) ndi nonlinear fiber ring mirror effect (NOLM). Malipoti ambiri okhudza kutulutsa kwa ma dissipative soliton resonance pulses amatengera njira ziwiri zotsekera.