Kudzora mafrequency ekurova kwemoyotekinoroji yekudzora pulse yelaser
1. Pfungwa yePulse frequency, laser pulse Rate (Pulse Repetition Rate) inoreva huwandu hwemapundu elaser anoburitswa panguva imwe neimwe, kazhinji muHertz (Hz). Mapundu ehigh frequency akakodzera kushandiswa kwepamusoro-soro, nepo mapundu elow frequency akakodzera mabasa ehigh energy single pulse.
2. Hukama huripo pakati pesimba, upamhi hwepulse uye frequency. Usati watanga kudzora mafrequency elaser, hukama huripo pakati pesimba, upamhi hwepulse uye frequency hunofanira kutanga hwatsanangurwa. Pane hukama hwakaoma pakati pesimba relaser, frequency uye pulse width, uye kugadzirisa imwe yema parameter kunowanzo da kufunga nezvemamwe ma parameter maviri kuti uvandudze mhedzisiro yekushandisa.
3. Nzira dzakajairika dzekudzora mafrequency ekurova kwemoyo
a. External control mode inoisa frequency signal kunze kwemagetsi, uye inogadzirisa laser pulse frequency nekudzora frequency uye duty cycle ye loading signal. Izvi zvinobvumira output pulse kuti ienderane ne load signal, zvichiita kuti ive yakakodzera kune maapplication anoda control chaiyo.
b. Internal control mode Chiratidzo chekudzora frequency chakavakirwa mu drive power supply, pasina kuwedzera kwesignali yekunze. Vashandisi vanogona kusarudza pakati pe frequency yakavakirwa mukati kana frequency yekudzora yemukati inogadziriswa kuti igone kuchinjika zvakanyanya.
c. Kugadzirisa hurefu hwe resonator kanamodulator yemagetsi-opticalHunhu hwema frequency elaser hunogona kuchinjwa nekugadzirisa hurefu hwe resonator kana kushandisa electro-optical modulator. Nzira iyi yekudzora ma frequency akawanda inowanzo shandiswa mumashandisirwo anoda simba repakati nepakati uye hupamhi hupfupi hwe pulse, senge laser micromachining uye medical imaging.
d. Modulator yeAcousto optic(AOM Modulator) chishandiso chakakosha chekudzora pulse frequency tekinoroji yekudzora pulse yelaser.Modulator yeAOMinoshandisa acousto optic effect (kureva kuti, kumanikidzwa kwemechanical oscillation kwemafungu eruzha kunochinja refractive index) kugadzirisa uye kudzora laser beam.
4. Tekinoroji yekushandura intracavity, kana ichienzaniswa nekushandura kwekunze, kushandura intracavity kunogona kugadzira simba rakawanda uye simba repamusoro zvinobudiriralaser yekurova kwemoyoZvinotevera ndezvina nzira dzinozivikanwa dzekushandura intracavity modulation:
a. Kuchinja kweGain nekuchinja nekukurumidza pombi, gain medium particle number inversion uye gain coefficient zvinokurumidza kusimbiswa, zvichipfuura mwero wemwaranzi unosimudzirwa, zvichikonzera kuwedzera kwakanyanya kwemaphoton mu cavity uye kugadzirwa kwe short pulse laser. Nzira iyi inonyanya kuwanikwa muma semiconductor lasers, ayo anogona kugadzira pulses kubva kuma nanoseconds kusvika kumakumi ema picoseconds, ine repetition rate ye gigahertz yakati wandei, uye inoshandiswa zvakanyanya mumunda we optical communications ine mwero wepamusoro wekutumira data.
Q switch (Q-switching) Q switches dzinodzvinyirira optical feedback nekuunza kurasikirwa kwakanyanya mu laser cavity, zvichibvumira maitiro ekupomba kuti agadzire kudzoserwa kwehuwandu hwezvinhu zviri mukati kure kupfuura muganhu, zvichichengetedza simba rakawanda. Zvadaro, kurasikirwa mu cavity kunodzikira nekukurumidza (ndiko kuti, kukosha kweQ mu cavity kunowedzerwa), uye optical feedback inobatidzwa zvakare, kuitira kuti simba rakachengetwa riburitswe muchimiro che ultra-short high-intensity pulses.
c. Mode Locking inogadzira ma pulses mapfupi e picosecond kana kunyange femtosecond level nekudzora hukama hwe phase pakati pemhando dzakasiyana dze longitudinal dziri mu laser cavity. Tekinoroji ye mode-locking yakakamurwa kuita passive mode-locking uye active mode-locking.
d. Kurasa Maburi Nekuchengetedza simba mumaphoton ari mu resonator, uchishandisa girazi repaburi rinorasikirwa zvishoma kuti ubatanidze maphoton zvinobudirira, uchichengetedza mamiriro ekurasikirwa mashoma mupaburi kwenguva yakati. Mushure mekutenderera kamwe chete, kurova kwemoyo kwakasimba "kunodururwa" kunze kwepaburi nekukurumidza nekuchinja chinhu chemukati chepaburi, senge acousto-optic modulator kana electro-optic shutter, uye short pulse laser inoburitswa. Zvichienzaniswa neQ-switching, kubvisa maburi kunogona kuchengetedza pulse width ye nanoseconds dzinoverengeka pa high repetition rates (senge megahertz dzinoverengeka) uye kunobvumira pulse energy yakakwira, kunyanya kune maapplication anoda high repetition rates uye short pulses. Pamwe chete nedzimwe nzira dzekugadzira maburi, simba rekurova kwemoyo rinogona kuvandudzwa zvakanyanya.
Kudzora kutenderera kweropalaserinzira yakaoma uye inokosha, inosanganisira kudzora pulse width, pulse frequency control uye nzira dzakawanda dze modulation. Kuburikidza nekusarudza zvine musoro uye kushandisa nzira idzi, mashandiro elaser anogona kugadziriswa nemazvo kuti aenderane nezvinodiwa nemamiriro akasiyana ekushandisa. Mune ramangwana, nekubuda kwezvinhu zvitsva uye matekinoroji matsva nguva dzose, tekinoroji ye pulse control yelaser ichaunza budiriro dzakawanda, uye ichakurudzira kukura kwetekinoroji yelasernenzira yekushanda kwakanyatsojeka uye kwakafara.
Nguva yekutumira: Kurume-25-2025