Kulamulira pafupipafupi kwa kugunda kwa mtima kwa ukadaulo wowongolera kugunda kwa mtima wa laser

Kulamulira ma frequency a kugunda kwa mtimaUkadaulo wowongolera kugunda kwa mtima wa laser

1. Lingaliro la ma pulse frequency, laser pulse Rate (Pulse Repetition Rate) limatanthauza kuchuluka kwa ma laser pulses omwe amatulutsidwa pa unit time, nthawi zambiri mu Hertz (Hz). Ma high frequency pulses ndi oyenera kugwiritsa ntchito high frequency rate, pomwe low frequency pulses ndi oyenera ntchito za single pulse pulse zamphamvu kwambiri.

2. Ubale pakati pa mphamvu, m'lifupi mwa kugunda kwa mtima ndi mafupipafupi Musanayambe kulamulira mafupipafupi a laser, ubale pakati pa mphamvu, m'lifupi mwa kugunda kwa mtima ndi mafupipafupi uyenera kufotokozedwa kaye. Pali kuyanjana kovuta pakati pa mphamvu ya laser, mafupipafupi ndi m'lifupi mwa kugunda kwa mtima, ndipo kusintha chimodzi mwa magawo nthawi zambiri kumafuna kuganizira magawo ena awiri kuti muwongolere zotsatira za ntchito.

3. Njira zodziwika bwino zowongolera ma pulse frequency

a. Njira yowongolera yakunja imayika chizindikiro cha ma frequency kunja kwa magetsi, ndikusintha ma frequency a laser pulse powongolera ma frequency ndi duty cycle ya chizindikiro chokweza. Izi zimathandiza kuti pulse yotulutsa igwirizane ndi chizindikiro chokweza, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsa ntchito zomwe zimafuna kuwongolera kolondola.

b. Njira yowongolera mkati Chizindikiro chowongolera ma frequency chimayikidwa mu drive power supply, popanda kuwonjezera chizindikiro chakunja. Ogwiritsa ntchito amatha kusankha pakati pa ma frequency okhazikika kapena ma frequency owongolera mkati osinthika kuti azitha kusinthasintha kwambiri.

c. Kusintha kutalika kwa resonator kapenamodulator yamagetsi ndi kuwalaMakhalidwe a pafupipafupi a laser amatha kusinthidwa mwa kusintha kutalika kwa resonator kapena kugwiritsa ntchito electro-optical modulator. Njira iyi yowongolera pafupipafupi nthawi zambiri imagwiritsidwa ntchito pazinthu zomwe zimafuna mphamvu yapakati komanso kutalika kwafupipafupi kwa pulse, monga laser micromachining ndi kujambula zamankhwala.

d. Chowongolera cha Acousto optic(AOM Modulator) ndi chida chofunikira kwambiri chowongolera ma pulse frequency a ukadaulo wowongolera ma pulse a laser.AOM Modulatorimagwiritsa ntchito mphamvu ya acousto optic (ndiko kuti, kuthamanga kwa makina kwa mafunde a phokoso kumasintha chizindikiro cha refractive) kuti isinthe ndikuwongolera kuwala kwa laser.

4. Ukadaulo wa Intracavity modulation, poyerekeza ndi external modulation, intracavity modulation ingathe kupanga mphamvu zambiri komanso mphamvu yapamwamba kwambiri.laser ya kugunda kwa mtimaNazi njira zinayi zodziwika bwino zosinthira mkati mwa chitseko:

a. Kusinthasintha kwa Gain Posintha mwachangu gwero la pampu, kusintha kwa kuchuluka kwa tinthu tating'onoting'ono ta gain medium particle ndi gain coefficient zimakhazikika mwachangu, kupitirira kuchuluka kwa radiation komwe kumalimbikitsidwa, zomwe zimapangitsa kuti ma photon achuluke kwambiri m'mimbamo komanso kupanga laser yafupifupi ya pulse. Njirayi ndi yofala kwambiri mu ma laser a semiconductor, omwe amatha kupanga ma pulse kuyambira ma nanoseconds mpaka makumi a ma picoseconds, ndi liwiro lobwerezabwereza la gigahertz zingapo, ndipo imagwiritsidwa ntchito kwambiri pankhani yolumikizirana ndi kuwala ndi kuchuluka kwakukulu kwa kutumiza deta.

Q switch (Q-switching) Q switches imaletsa kuyankha kwa kuwala mwa kuyambitsa kutayika kwakukulu mu laser cavity, zomwe zimathandiza kuti njira yopopera ipange kutembenuka kwa tinthu tating'onoting'ono kupitirira malire, kusunga mphamvu zambiri. Pambuyo pake, kutayika mu cavity kumachepa mwachangu (ndiko kuti, mtengo wa Q wa cavity umawonjezeka), ndipo kuyankha kwa kuwala kumayatsidwanso, kotero kuti mphamvu yosungidwayo imatulutsidwa mu mawonekedwe a ultra-short high-intensity pulses.

c. Mode Locking imapanga ma pulse afupi kwambiri a picosecond kapena femtosecond level powongolera ubale wa gawo pakati pa ma modes osiyanasiyana a longitudinal mu laser cavity. Ukadaulo wa mode-locking umagawidwa m'magulu awiri: passive mode-locking ndi active mode-locking.

d. Kutaya Mphamvu M'mabowo Mwa kusunga mphamvu mu ma photon mu resonator, pogwiritsa ntchito galasi lopanda mphamvu kuti limange bwino ma photon, kusunga mkhalidwe wotsika wa kutayika m'bowo kwa nthawi ndithu. Pambuyo pa ulendo umodzi wozungulira, kugunda kwamphamvu "kumachotsedwa" m'bowo mwa kusintha mwachangu gawo lamkati la cavity, monga acousto-optic modulator kapena electro-optic shutter, ndipo laser yaifupi ya pulse imatulutsidwa. Poyerekeza ndi Q-switching, kutayira mpweya m'bowo kumatha kusunga pulse width ya nanoseconds zingapo pamlingo wapamwamba wobwerezabwereza (monga megahertz zingapo) ndikulola mphamvu zambiri za pulse, makamaka pakugwiritsa ntchito komwe kumafuna kubwerezabwereza kwakukulu ndi ma pulse afupi. Kuphatikiza ndi njira zina zopangira ma pulse, mphamvu ya pulse imatha kukonzedwanso.

Kulamulira kwa kugunda kwa mtimalaserndi njira yovuta komanso yofunika, yomwe imaphatikizapo kuwongolera m'lifupi mwa pulse, kuwongolera ma frequency a pulse ndi njira zambiri zosinthira. Kudzera mu kusankha koyenera ndikugwiritsa ntchito njirazi, magwiridwe antchito a laser amatha kusinthidwa molondola kuti akwaniritse zosowa za zochitika zosiyanasiyana zogwiritsira ntchito. M'tsogolomu, ndi kubuka kosalekeza kwa zipangizo zatsopano ndi ukadaulo watsopano, ukadaulo wowongolera pulse wa lasers udzabweretsa kupita patsogolo kwambiri, ndikulimbikitsa chitukuko chaukadaulo wa laserpotengera kulondola kwambiri komanso kugwiritsa ntchito bwino.