A. Pfungwa ye ultrafast lasers
Ultrafast lasers kazhinji inoreva kumodhi-yakakiyiwa lasers inoshandiswa kuburitsa ultra-short pulses, semuenzaniso, pulses yefemtosecond kana picosecond duration.Iri zita rakanyatsojeka ringava ultrashort pulse laser.Ultrashort pulse lasers ingangoita mode-yakakiyiwa lasers, asi kuwana switching maitiro kunogona zvakare kuburitsa ekupedzisira mapuruzi.
B. Mhando ye ultrafast laser
1. Ti-sapphire lasers, kazhinji Kerr lens mode-yakakiyiwa, inogona kuburitsa pulses ipfupi senge 5 fs munguva.Simba ravo repakati rekubuda rinowanzoita mazana mashoma emamilliwatts, ane pulse kudzokorora mazinga e, toti, 80MHz uye makumi emafemtoseconds kana mashoma, uye pulse durations emakumi emafemtoseconds kana mashoma, zvichikonzera simba rakanyanyisa repamusoro.Asi titanium-sapphire lasers inoda kupomba mwenje kubva kune mamwe girinhi-mwenje lasers, izvo zvinoita kuti ive yakaoma uye inodhura.
2. Kune akasiyana diode-pumped lasers anobva pane, semuenzaniso, ytterbium-doped (crystal kana girazi) kana chromium-doped laser crystals, iyo inowanzoshandisa SESAM passive mode-locking.Kunyangwe iyo pulse nguva ye diode-pumped lasers isina kupfupika sekupuruzira kwenguva yetitanium-sapphire lasers, diode-pumped lasers inogona kufukidza yakafara parameter dunhu maererano nekupuruzira nguva, pulse kudzokorodza, uye avhareji simba (ona pazasi) .
3. Fiber lasers yakavakirwa pagirazi faibha doped nezvinhu zvisingawanzoitiki zvepasi zvinogonawo kunge zvisingaite-yakakiyiwa, semuenzaniso, kushandisa nonlinear polarization rotation kana SESAM.Iwo ane mashoma kupfuura akawanda lasers maererano neavhareji simba, kunyanya peak simba, asi anogona kusanganiswa zviri nyore nefiber amplifiers.Chinyorwa chemodhi-yakakiyiwa fiber lasers chinopa mamwe mashoko.
(4) mode-yakakiyiwa diode lasers inogona kuve yakakosha zvishandiso kana ekunze mhango diode lasers, uye inogona kushanda, passive kana yakasanganiswa-yakakiiwa.Kazhinji, modhi-yakakiyiwa diode lasers inoshanda pakakwirira (zviuru zvinoverengeka megahertz) pulse repetition rate pane ine mwero pulse simba.
Ultrafast laser oscillators inogona kuve chikamu che Ultrafast laser masisitimu, anogona zvakare kusanganisira Ultrafast amplifier (senge fiber optic amplifier) kuwedzera peak simba uye avhareji yekubuda simba.
Nguva yekutumira: Jun-20-2023