Introducefiber pulsed lasers
Fiber Pulsed lasers ndizvoLaser zvishandisodzinoshandisa mafiibhi akaiswa maion epasi asingawanzo (akadai seytterbium, erbium, thulium, nezvimwewo) senzira yekuwana. Iwo anosanganisira kuwana svikiro, optical resonant cavity, uye pombi sosi. Yayo pulse generation tekinoroji inonyanya kusanganisira Q-switching tekinoroji (nanosecond level), inoshanda mode-locking (picosecond level), passive mode-locking (femtosecond level), uye main oscillation simba amplification (MOPA) tekinoroji.
Zvishandiso zveindasitiri zvinovhara kucheka simbi, welding, laser kuchenesa uye lithium bhatiri TAB kucheka mumunda mutsva wesimba, ine akawanda-modhi yekubuda simba inosvika padanho rezviuru gumi-watt. Mumunda we lidar, 1550nm pulsed lasers, ine simba rayo rakakwirira uye maziso-akachengeteka maficha, anoshandiswa mumhando uye yemotokari-yakaiswa radar masisitimu.
Iwo makuru echigadzirwa mhando anosanganisira Q-inochinja mhando, MOPA mhando uye yakakwirira-simba faibhapulsed lasers. Category:
1. Q-switched fiber laser: Nheyo yeQ-kuchinja ndeyekuwedzera kurasikirwa-kugadziriswa mudziyo mukati me laser. Munguva zhinji dzenguva, iyo laser ine kurasikirwa kukuru uye inenge isina kuburitsa chiedza. Mukati menguva pfupi yakanyanyisa yenguva, kuderedza kurasikirwa kwechigadzirwa kunoita kuti laser ibudise yakanyanya kupfupika pulse. Q-switched fiber lasers inogona kuwanikwa ingave nekushingaira kana kungoita. Active tekinoroji inowanzo sanganisira kuwedzera intensity modulator mukati megomba kudzora kurasikirwa kwelaser. Passive matekiniki anoshandisa saturated absorbers kana zvimwe zvisina mutsara mhedzisiro senge inosimudzira Raman kupararira uye inosimudzira Brillouin kupararira kuumba Q-modulation masisitimu. Iwo mapurusi anowanzo kugadzirwa neQ-kuchinja nzira ari padanho re nanosecond. Kana mapfupi pulses achizogadzirwa, anogona kuwanikwa kuburikidza nemodhi-yekuvhara nzira.
2. Mode-yakakiyiwa fiber laser: Inogona kugadzira ultrashort pulses kuburikidza neanoshanda mode-locking kana passive mode-locking nzira. Nekuda kwenguva yekupindura yemodulator, iyo pulse hupamhi inogadzirwa neanoshanda mode-yekuvhara kazhinji iri papicosecond level. Passive mode-locking inoshandisa passive mode-yekuvhara michina, ine nguva pfupi yekupindura uye inogona kuburitsa mapulses pachiyero chefemtosecond.
Heino sumo pfupi kune musimboti wekukiya mold.
Kune zvisingaverengeki longitudinal modes mune laser resonant cavity. Kune mhango yakaita serin'i, nguva yenguva dzelongitudinal modes yakaenzana ne /CCL, uko C ndiko kumhanya kwechiedza uye CL ndiyo nzira yekutarisa kureba kwechiratidzo chechiedza chinofamba rwendo rumwechete mukati memhango. Kazhinji kutaura, kuwana bandwidth yefiber lasers yakakura, uye nhamba huru yelongitudinal modes inoshanda panguva imwe chete. Huwandu hwemhando dzemodhi dzinogona kugarwa nelaser zvinoenderana neiyo longitudinal modhi kupindirana ∆ν uye kuwana bandwidth yekuwana yepakati. Iyo diki iyo longitudinal mode kupindirana, iyo yakakura kuwana bandwidth yepakati, uye iyo yakawanda longitudinal modes inogona kutsigirwa. Zvakasiyana, zvishoma.
3. Quasi-inoenderera mberi laser (QCW laser) : Iyo yakakosha kushanda mode pakati peinoenderera mberi wave lasers (CW) uye pulsed lasers. Iyo inowana yakakwira nekukasika simba kubuda kuburikidza neperiodic refu pulses (basa kutenderera kazhinji ≤1%) uku ichichengetedza yakaderera avhareji simba. Iyo inosanganisa kugadzikana kweanoenderera mberi lasers pamwe nepamusoro pesimba mukana we pulsed lasers.
Tekinoroji nheyo: QCW lasers inotakura modulation modules mune inoendereralaserredunhu kucheka anoenderera mberi lasers kuita yakakwira duty cycle pulse sequences, kuwana inoshanduka inoshanduka pakati pekuenderera uye pulse modes. Chinhu chayo chikuru ndeye "yenguva pfupi kuputika, kutonhora kwenguva refu". Iko kutonhodza mugomba rekupuruzira kunoderedza kuunganidzwa kwekupisa uye kunodzikisa njodzi yechinhu chemafuta deformation.
Zvakanakira uye maficha: Kubatanidzwa kweDual-mode: Inobatanidza simba repamusoro re pulse mode (kusvika ku10 nguva yeavhareji simba reinoenderera mode) nehupamhi hwepamusoro uye kugadzikana kweinoenderera modhi. a
Kuderera kwesimba rekushandisa: Yakakwira electro-optical shanduko inoshanda uye yakaderera-yenguva refu yekushandisa mutengo. a
Beam mhando: Iyo yakakwira danda mhando yefiber lasers inotsigira chaiyo micro-machining.
Nguva yekutumira: Nov-10-2025