Uniqueultrafast laserchikamu chekutanga
Unique zvimiro zve ultrafastlasers
Iyo yekupedzisira-ipfupi pulse nguva yeakanyanyafast lasers inopa aya masisitimu akasiyana zvivakwa zvinoasiyanisa kubva kure-kupuruzira kana kuenderera-wave (CW) lasers. Kuti ugadzire kupfupika kwakadai, yakakura spectrum bandwidth inodiwa. Iyo pulse chimiro uye yepakati wavelength inosarudza iyo shoma bandwidth inodiwa kugadzira mapurusi eimwe nguva yenguva. Kazhinji, hukama uhwu hunotsanangurwa maererano ne-time-bandwidth product (TBP), iyo inotorwa kubva kunheyo isina chokwadi. Iyo TBP yeGaussian pulse inopiwa neinotevera formula:TBPGaussian=ΔτΔν≈0.441
Δτ ndiyo nguva yekuputika uye Δv ndiyo frequency bandwidth. Muchidimbu, iyo equation inoratidza kuti kune hukama hwakasiyana pakati pe spectrum bandwidth uye pulse duration, zvichireva kuti sezvo nguva yekuputika inoderera, bandwidth inodiwa kuti ibudise iyo pulse inowedzera. Mufananidzo 1 unoratidza hushoma bandwidth inodiwa kutsigira akati wandei akasiyana pulse durations.
Mufananidzo 1: Minimum spectral bandwidth inodiwa kutsigiralaser pulsesyegumi ps (girinhi), 500 fs (bhuruu), uye 50 fs (tsvuku)
Iwo ehunyanzvi matambudziko e Ultrafast lasers
Iyo yakafara spectral bandwidth, peak simba, uye ipfupi pulse nguva yeultrafast lasers inofanirwa kuchengetedzwa nemazvo musystem yako. Kazhinji, imwe yemhinduro dzakareruka kune aya matambudziko ndeye yakafara spectrum kubuda kwema lasers. Kana iwe wakamboshandisa refu pulse kana inoenderera-wave lasers munguva yakapfuura, yako iripo stock ye optical components inogona kusakwanisa kuratidza kana kufambisa iyo yakazara bandwidth yeultrafast pulses.
Laser kukanganisa chikumbaridzo
Ultrafast optics zvakare ine zvakasiyana zvakanyanya uye zvakanyanya kuoma kufamba nelaser kukuvara zvikumbaridzo (LDT) zvichienzaniswa nemamwe akajairwa laser masosi. Kana optics inopihwananosecond pulsed lasers, LDT tsika dzinowanzoita muhurongwa hwe5-10 J/cm2. Kune ma Ultrafast optics, kukosha kwehukuru uhu haatombonzwiki, sezvo LDT hunhu hunogona kunge huri pahurongwa hwe <1 J/cm2, kazhinji pedyo ne0.3 J/cm2. Iyo yakakosha kusiyanisa kweLDT amplitude pasi peakasiyana pulse durations ndeye mhedzisiro yelaser kukuvara kwemaitiro zvichienderana nepulse durations. Kune nanosecond lasers kana kurebapulsed lasers, iyo nzira huru inokonzera kukanganisa ndiko kupisa kwekushisa. Iyo yekupfekedza uye substrate zvinhu zveoptical devicestora mafotoni echiitiko uye kupisa iwo. Izvi zvinogona kutungamira mukukanganiswa kweiyo crystal lattice yezvinhu. Kuwedzera kwekupisa, kutsemuka, kunyunguduka uye tambo yelattice ndiyo yakajairika kupisa kupisa nzira dzeizvi.Laser sources.
Nekudaro, kune ekupedzisira lasers, iyo pulse duration pachayo inokurumidza kupfuura iyo nguva yekupisa kwekutamisa kubva kune laser kuenda kune yemidziyo lattice, saka iyo yekupisa mhedzisiro haisiriyo honzeri yekukuvara kwelaser-induced. Panzvimbo iyoyo, iro repamusoro simba reiyo Ultrafast laser inoshandura iyo yekukuvadza kuita maitiro asina mutsara akadai seakawanda-photon absorption uye ionization. Ichi ndicho chikonzero hazvigoneke kungodzikisa pasi chiyero cheLDT che nanosecond pulse kune iyo ye-ultrafast pulse, nokuti maitiro emuviri ekukuvadza akasiyana. Naizvozvo, pasi pemamiriro akafanana ekushandiswa (semuenzaniso, kureba, kureba kwenguva, uye mwero wekudzokorora), mudziyo wekuona une yakakwira zvakakwana LDT rating ichave yakanakisa optical mudziyo kune yako chaiyo application. Optics yakaedzwa pasi pemamiriro akasiyana-siyana haisi mumiriri wekuita chaiko kweiyo optics yakafanana muhurongwa.
Mufananidzo 1: Nzira dzelaser induced kukuvara neakasiyana pulse durations
Nguva yekutumira: Jun-24-2024