Sumalasers dzakaputirwa nefaibha
Malaser eFiber Pulsed arimidziyo yelaseranoshandisa fibers dzakasanganiswa nemaion earth rare (akadai seytterbium, erbium, thulium, nezvimwewo) se gain medium. Anosanganisira gain medium, optical resonant cavity, uye pombi source. Tekinoroji yayo yekugadzira pulse inosanganisira tekinoroji yeQ-switching (nanosecond level), active mode-locking (picosecond level), passive mode-locking (femtosecond level), uye tekinoroji huru ye oscillation power amplification (MOPA).
Mashandisirwo emaindasitiri anosanganisira kucheka simbi, kukwesha, kuchenesa nelaser uye kucheka TAB yemabhatiri e lithium mumunda mutsva wesimba, nesimba rekuburitsa mamodhi akawanda richisvika padanho re10,000 watts. Mumunda welidar, ma pulsed lasers e1550nm, ane simba rawo rekurova kwemoyo uye zvinhu zvisingakuvadzi maziso, anoshandiswa muma radar systems akasiyana-siyana uye akaiswa mumotokari.
Mhando huru dzezvigadzirwa dzinosanganisira mhando yeQ-switched, mhando yeMOPA uye fiber ine simba gurumalaser ane pulsedChikamu:
1. Q-switched fiber laser: Nheyo yeQ-switching ndeyekuwedzera mudziyo unogadziriswa kurasikirwa mukati me laser. Munguva zhinji, laser inorasikirwa zvikuru uye inenge isina chiedza chinobuda. Munguva pfupi pfupi, kuderedza kurasikirwa kwemudziyo kunogonesa laser kuburitsa pulse yakasimba kwazvo. Q-switched fiber lasers inogona kuitwa actively kana passively. Active technology inowanzo sanganisira kuwedzera intensity modulator mukati me cavity kudzora kurasikirwa kwe laser. Passive techniques dzinoshandisa saturated absorbers kana zvimwe zvinokanganisa zvisiri zve linear zvakaita se stimulated Raman scattering uye stimulated Brillouin scattering kuti igadzire Q-modulation mechanisms. Ma pulses anowanzo gadzirwa nenzira dzeQ-switching ari pa nanosecond level. Kana ma shorter pulses achizogadzirwa, anogona kuwanikwa kuburikidza nenzira ye mode-locking.
2. Mode-locked fiber laser: Inogona kugadzira ma pulse mapfupi zvikuru kuburikidza nenzira dzinoshanda dze active mode-locking kana nzira dzinoshanda dze passive mode-locking. Nekuda kwenguva yekupindura ye modulator, upamhi hwe pulse hunogadzirwa ne active mode-locking hunowanzova pa picosecond level. Passive mode-locking inoshandisa michina inovhara passive mode, ine nguva pfupi yekupindura uye inogona kugadzira ma pulse pa femtosecond scale.
Heino sumo pfupi pamusoro penheyo yekukiya mold.
Kune nzira dzisingaverengeki dze longitudinal mu laser resonant cavity. Kune denderedzwa rakaita serin'i, frequency interval ye longitudinal modes yakaenzana ne /CCL, uko C iri kumhanya kwechiedza uye CL iri optical path length ye signal light inofamba rwendo rumwe rwekutenderera mukati me cavity. Kazhinji, gain bandwidth ye fiber lasers yakakura, uye nhamba huru ye longitudinal modes inoshanda panguva imwe chete. Huwandu hwese hwemodes ihwohwo hunogona kugadziriswa ne laser hunoenderana ne longitudinal mode interval ∆ν uye gain bandwidth ye gain medium. Kana longitudinal mode interval iri diki, gain bandwidth ye medium yakakura, uye longitudinal modes dzinogona kutsigirwa. Kusiyana neizvi, zvishoma.
3. Quasi-continuous laser (QCW laser): Inzira yakakosha yekushanda pakati pema "continuous wave lasers" (CW) nema "pulsed lasers". Inowana simba guru rinobuda nekukurumidza kuburikidza ne "periodic long pulses" (duty cycle kazhinji ≤1%) uku ichichengetedza avhareji yakaderera yesimba. Inobatanidza kugadzikana kwema "continuous lasers" ne "peak power benefit" yema "pulsed lasers".
Nheyo yehunyanzvi: QCW lasers load modulation modules mu continuouslasercircuit yekucheka ma laser anoenderera mberi kuita ma high duty cycle pulse sequences, zvichiita kuti pave nekuchinjana pakati pe continuous modes ne pulse modes. Chinhu chikuru chayo inzira ye "short-term burst, long-term cooling". Kutonhodza mu pulse gap kunoderedza kuungana kwekupisa uye kunoderedza njodzi yekushanduka kwekupisa kwezvinhu.
Zvakanakira uye maficha: Kubatanidzwa kweDual-mode: Inosanganisa simba repamusoro repulse mode (kusvika kagumi simba repakati peavhareji recontinuous mode) nekushanda kwepamusoro uye kugadzikana kwecontinuous mode.
Kushandiswa kwesimba shoma: Kushanda nesimba kwakanyanya pakushandura magetsi uye mutengo wakaderera wekushandisa kwenguva refu.
Hunhu hwedanda: Hunhu hwepamusoro hwemafiber lasers hunotsigira michina midiki chaiyo.
Nguva yekutumira: Mbudzi-10-2025