Mitundu ya laser yosinthika

Mitundu yalaser yosinthika

Kugwiritsa ntchito ma laser osinthika nthawi zambiri kumatha kugawidwa m'magulu awiri akuluakulu: limodzi ndi pamene ma laser a mzere umodzi kapena angapo okhala ndi mafunde okhazikika sangathe kupereka mafunde amodzi kapena angapo ofunikira; Gulu lina limaphatikizapo zochitika zomwelaserKutalika kwa mafunde kuyenera kusinthidwa nthawi zonse panthawi yoyesera kapena mayeso, monga spectroscopy ndi kuyesa kwa pompu.

Mitundu yambiri ya ma laser osinthika imatha kupanga mafunde osinthika (CW), nanosecond, picosecond kapena femtosecond pulse outputs. Makhalidwe ake otulutsa amatsimikiziridwa ndi njira yopezera laser yomwe imagwiritsidwa ntchito. Chofunika kwambiri pa ma laser osinthika ndichakuti amatha kutulutsa ma laser pamitundu yosiyanasiyana ya mafunde. Zigawo zapadera za kuwala zingagwiritsidwe ntchito kusankha mafunde enaake kapena ma wavelength band kuchokera ku ma emission band ama laser osinthikaApa tikukudziwitsani ma laser angapo odziwika bwino osinthika.

Laser yoyimirira ya CW yosinthika

Mwachiganizo,Laser ya CW yosinthikandi kapangidwe ka laser kosavuta kwambiri. Laser iyi imaphatikizapo galasi lowunikira kwambiri, cholumikizira chowonjezera mphamvu ndi galasi lolumikizira zotulutsa (onani Chithunzi 1), ndipo imatha kupereka zotulutsa za CW pogwiritsa ntchito mitundu yosiyanasiyana ya zolumikizira zowunikira mphamvu za laser. Kuti tikwaniritse kusintha, cholumikizira chowonjezera mphamvu chomwe chingaphimbe kutalika kwa mafunde omwe akufuna chiyenera kusankhidwa.

2. Laser yozungulira ya CW yosinthika

Ma laser a mphete akhala akugwiritsidwa ntchito kwa nthawi yayitali kuti akwaniritse kutulutsa kwa CW komwe kungasinthidwe kudzera mu njira imodzi yotalikirapo, yokhala ndi bandwidth ya spectral mumtundu wa kilohertz. Mofanana ndi ma laser a mafunde oima, ma laser a mphete osinthika amathanso kugwiritsa ntchito utoto ndi titanium safiro ngati njira yopezera zinthu. Utoto ukhoza kupereka mzere wopapatiza kwambiri wochepera 100 kHz, pomwe titanium safiro imapereka mzere wochepera 30 kHz. Mtundu wa tuning wa laser ya utoto ndi 550 mpaka 760 nm, ndipo wa titanium safiro laser ndi 680 mpaka 1035 nm. Zotuluka za mitundu yonse iwiri ya ma laser zimatha kuwirikiza kawiri ku UV band.

3. Laser yotsekedwa mode-quasi-continuous

Pa ntchito zambiri, kufotokoza bwino nthawi yomwe laser output imatulutsa n'kofunika kwambiri kuposa kufotokoza bwino mphamvu. Ndipotu, kukwaniritsa ma pulse afupiafupi a kuwala kumafuna kasinthidwe ka cavity komwe njira zambiri zotalika zimamveka nthawi imodzi. Pamene njira zotalika izi zozungulira zili ndi ubale wokhazikika mkati mwa laser cavity, laser idzatsekedwa mode. Izi zithandiza kuti pulse imodzi isunthe mkati mwa cavity, ndi nthawi yake yodziwika ndi kutalika kwa laser cavity. Active mode-locking ikhoza kuchitika pogwiritsa ntchitomodulator ya acousto-optic(AOM), kapena passive mode-locking ikhoza kuchitika kudzera mu lenzi ya Kerr.

4. Laser yothamanga kwambiri ya ytterbium

Ngakhale kuti ma laser a titanium safiro ali ndi ntchito zambiri, kuyesa kwina kwa zamoyo kumafuna mafunde ataliatali. Njira yodziwika bwino yoyamwa ma photon awiri imayendetsedwa ndi ma photon okhala ndi mafunde a 900 nm. Popeza mafunde ataliatali amatanthauza kufalikira kochepa, mafunde ataliatali oyambitsa amatha kuyendetsa bwino kuyesa kwa zamoyo komwe kumafunikira kuzama kwambiri kwa kujambula.

Masiku ano, ma laser osinthika akhala akugwiritsidwa ntchito m'magawo ambiri ofunikira, kuyambira kafukufuku woyambira wasayansi mpaka kupanga ma laser ndi sayansi ya moyo ndi thanzi. Mitundu yaukadaulo yomwe ilipo pakadali pano ndi yayikulu kwambiri, kuyambira pamakina osavuta osinthika a CW, omwe mzere wake wopapatiza ungagwiritsidwe ntchito pa spectroscopy yapamwamba kwambiri, kujambulidwa kwa mamolekyulu ndi ma atomu, ndi kuyesa kwa quantum optics, kupereka chidziwitso chofunikira kwa ofufuza amakono. Opanga ma laser amasiku ano amapereka mayankho amodzi, kupereka kutulutsa kwa laser komwe kumapitilira 300 nm mkati mwa mphamvu ya nanojoule. Makina ovuta kwambiri amakhala ndi mitundu yosiyanasiyana yodabwitsa ya ma spectral kuyambira 200 mpaka 20,000 nm m'mitundu ya microjoule ndi millijoule.