Mitundu ya tunable laser

Mitundu yalaser yokhazikika

Kugwiritsa ntchito ma lasers osinthika kumatha kugawidwa m'magulu awiri akulu: imodzi ndi yomwe ma laser amtundu umodzi kapena mizere yamitundu yambiri sangathe kupereka mafunde amodzi kapena angapo ofunikira; Gulu lina limaphatikizapo zochitika zomwelaserkutalika kwa mafunde kuyenera kuyang'aniridwa mosalekeza panthawi yoyesera kapena kuyesa, monga zowonera ndi zoyeserera zapampu.

Mitundu yambiri ya ma lasers osinthika amatha kupanga zotulutsa zopitilira muyeso (CW), nanosecond, picosecond kapena femtosecond pulse. Zotsatira zake zimatsimikiziridwa ndi laser gain medium yomwe imagwiritsidwa ntchito. Chofunikira pa ma lasers osinthika ndikuti amatha kutulutsa ma lasers pamafunde osiyanasiyana. Zigawo zapadera za kuwala zingagwiritsidwe ntchito kusankha mafunde enieni kapena magulu a kutalika kwa magulu a emissionma lasers osavuta. Apa tikuwonetsani ma lasers angapo odziwika kwa inu

Tunable CW stand wave laser

Concept, aLaser ya CW tunablendi yosavuta laser zomangamanga. Laser iyi imaphatikizapo kalirole wowoneka bwino kwambiri, chopezera phindu komanso galasi lolumikizira (onani Chithunzi 1), ndipo limatha kupereka kutulutsa kwa CW pogwiritsa ntchito media osiyanasiyana a laser. Kuti mukwaniritse tunability, sing'anga yopindula yomwe imatha kubisala kutalika kwa mafunde amayenera kusankhidwa.

2. Tunable CW mphete laser

Ma lasers a mphete akhala akugwiritsidwa ntchito kuti akwaniritse kutulutsa kwa CW kosasinthika kudzera munjira imodzi yotalikirapo, yokhala ndi bandwidth yowonera mumtundu wa kilohertz. Zofanana ndi ma lasers oyimirira, ma laser opangidwa ndi mphete amathanso kugwiritsa ntchito utoto ndi safiro wa titaniyamu ngati media. Utoto ukhoza kupereka mizere yopapatiza kwambiri m'lifupi mwake osakwana 100 kHz, pomwe titaniyamu safiro imapereka mizere yochepera 30 kHz. Mitundu yosinthira ya laser ya utoto ndi 550 mpaka 760 nm, ndipo ya titaniyamu safiro laser ndi 680 mpaka 1035 nm. Zotsatira za mitundu yonse iwiri ya lasers zitha kuwirikiza kawiri ku gulu la UV.

3. Mode-zokhoma kopitilira muyeso laser

Pazogwiritsa ntchito zambiri, kufotokozera bwino nthawi yomwe laser imatulutsa ndikofunikira kwambiri kuposa kutanthauzira mphamvu. M'malo mwake, kuti mukwaniritse mawonekedwe afupikitsa optical pulses kumafuna kasinthidwe kamene kamakhala ndi njira zambiri zotalikirana zomwe zimamveka nthawi imodzi. Ma cyclic longitudinal modes akakhala ndi ubale wokhazikika mkati mwa laser cavity, laser imakhala yotsekedwa. Izi zipangitsa kuti kugunda kumodzi kugwedezeke mkati mwa patsekeke, ndipo nthawi yake imatanthauzidwa ndi kutalika kwa laser patsekeke. Active mode-locking itha kutheka pogwiritsa ntchitoacousto-optic modulator(AOM), kapena kutseka kwapang'onopang'ono kumatha kuzindikirika kudzera pa lens ya Kerr.

4. Ultrafast ytterbium laser

Ngakhale ma laser a safiro a titaniyamu ali ndi magwiridwe antchito ambiri, kuyesa kwina kwachilengedwe kumafunikira kutalika kwa mafunde. Mayamwidwe amtundu wazithunzi ziwiri amasangalatsidwa ndi ma photon okhala ndi kutalika kwa 900 nm. Chifukwa kutalika kwa mafunde kumatanthawuza kufalikira pang'ono, kutalika kwa mafunde osangalatsa kumatha kuyendetsa bwino kuyesa kwachilengedwe komwe kumafunikira kuzama kwazithunzi.

Masiku ano, ma lasers osinthika agwiritsidwa ntchito pazinthu zambiri zofunika, kuyambira pakufufuza koyambira kwasayansi mpaka kupanga laser ndi sayansi ya moyo ndi thanzi. Ukadaulo womwe ukupezeka pano ndiwotambasula kwambiri, kuyambira pamakina osavuta a CW, omwe kutalika kwake kocheperako kumatha kugwiritsidwa ntchito ngati mawonekedwe owoneka bwino, ma cell ndi ma atomiki, komanso kuyesa kwa quantum optics, kupereka chidziwitso chofunikira kwa ofufuza amakono. Masiku ano opanga ma laser amapereka njira zoyimitsa kamodzi, zomwe zimapereka laser kutulutsa kopitilira 300 nm mkati mwa nanojoule mphamvu. Makina ovuta kwambiri amakhala ndi mawonekedwe owoneka bwino a 200 mpaka 20,000 nm mumitundu yamphamvu ya microjoule ndi millijoule.