Yakasiyanalaser inokurumidza zvikuruchikamu chekutanga
Hunhu hwakasiyana hweUltrafastlasers
Nguva yekurova kwemoyo kwenguva pfupi-pfupi yemalaser e-ultrafast inopa masisitimu aya hunhu hwakasiyana hunoasiyanisa nemalaser e-long-pulse kana continuous-wave (CW). Kuti pave nekurova kwemoyo kwenguva pfupi kwakadaro, bandwidth ye-wide spectrum inodiwa. Chimiro chekurova kwemoyo uye wavelength yepakati zvinosarudza bandwidth shoma inodiwa kuti pave nekurova kwemoyo kwenguva yakati. Kazhinji, hukama uhwu hunotsanangurwa maererano nechinhu chenguva-bandwidth (TBP), icho chinobva papfungwa yekusava nechokwadi. TBP yekurova kwemoyo yeGaussian inopiwa nefomula inotevera :TBPGaussian=ΔτΔν≈0.441
Δτ ndiyo nguva yekurova kwemoyo uye Δv ndiyo bandwidth yefrequency. Muchidimbu, equation inoratidza kuti pane hukama hwakasiyana pakati pe spectrum bandwidth uye nguva yekurova kwemoyo, zvichireva kuti sezvo nguva yekurova kwemoyo inoderera, bandwidth inodiwa kuti pulse iyoyo iwedzere. Mufananidzo 1 unoratidza bandwidth shoma inodiwa kutsigira nguva dzakasiyana dzekurova kwemoyo.
Mufananidzo 1: Bandwidth shoma yespectral inodiwa kuti itsigirekurova kwemhasuru nelaserye10 ps (girini), 500 fs (bhuruu), uye 50 fs (tsvuku)
Matambudziko ehunyanzvi emagetsi e-ultrafast lasers
Kureba kwe spectral bandwidth, simba repamusoro, uye nguva pfupi yekurova kwemoyo yema lasers ekukurumidza kunofanira kutarisirwa nemazvo musystem yako. Kazhinji, imwe yemhinduro dziri nyore dzematambudziko aya i broad spectrum output yema lasers. Kana wakamboshandisa ma lasers ekukurumidza kutenderera kwenguva refu kana ma continuous-wave kare, huwandu hwako hwezvinhu zve optical hunogona kusakwanisa kuratidza kana kutumira bandwidth yakazara yema ultrafast pulses.
Chikumbaridzo chekukuvara kweLaser
Maoptics e-Ultrafast anewo zvakasiyana zvakanyanya uye zvakaoma kushandisa laser damage thresholds (LDT) zvichienzaniswa nemagetsi e-laser akajairika. Kana maoptics akapihwalasers dze nanosecond pulsed, LDT values dzinowanzova pakati pe5-10 J/cm2. Kune ultrafast optics, values dzehukuru uhwu hadzina kumbonzwikwa, sezvo LDT values dzinowanzova pakati pe<1 J/cm2, kazhinji dziri pedyo ne0.3 J/cm2. Kusiyana kwakakosha kweLDT amplitude pasi penguva dzakasiyana dzepulse imhedzisiro ye laser damage mechanism zvichibva panguva dzepulse. Kune nanosecond lasers kana kupfuura.malaser ane pulsed, chinhu chikuru chinokonzera kukuvara ndiko kupisa kwemhepo. Kuputira uye zvinhu zvepasi pevhu zvezvishandiso zvemazisoinonwisa ma photon echiitiko ichi yoadziisa. Izvi zvinogona kukonzera kukanganiswa kwekristaro yejira rechinhu chacho. Kuwedzera kwekupisa, kutsemuka, kunyunguduka uye kusvuta kwejira ndiyo nzira dzinoshandiswa zvakanyanya pakupisa idzi.masosi elaser.
Zvisinei, kune ma-laser anokurumidza, nguva yekurova kwemoyo pachayo inokurumidza kupfuura nguva yekutamiswa kwekupisa kubva ku-laser kuenda ku-lattice yezvinhu, saka mhedzisiro yekupisa haisiyo inonyanya kukonzera kukuvara kunokonzerwa ne-laser. Pane kudaro, simba guru re-laser rinoshandura nzira yekukuvara kuita maitiro asina kurongeka akadai sekunyudzwa kwe-photon yakawanda uye ionization. Ndokusaka zvisingabviri kungoderedza chiyero cheLDT che-nanosecond pulse kuenda kune che-ultrafast pulse, nekuti mashandiro emuviri ekukuvara akasiyana. Saka, pasi pemamiriro akafanana ekushandiswa (semuenzaniso, wavelength, nguva yekurova kwemoyo, uye chiyero chekudzokorora), mudziyo we-optical une chiyero cheLDT chakakwira zvakakwana uchava mudziyo we-optical wakanakisa wekushandisa kwako. Ma-optical akaedzwa pasi pemamiriro akasiyana haamiriri mashandiro chaiwo e-optical imwechete musystem.
Mufananidzo 1: Nzira dzekukuvara kunokonzerwa nelaser dzine nguva dzakasiyana dzekurova kwemoyo
Nguva yekutumira: Chikumi-24-2024