A. Ke kumumanaʻo o nā lasers wikiwiki loa
ʻO ka maʻamau, pili nā lasers Ultrafast i nā lasers mode-locked i hoʻohana ʻia e hoʻopuka i nā pulse ultra-short, no ka laʻana, nā pulse o ka lōʻihi femtosecond a i ʻole picosecond. ʻO kahi inoa pololei ʻoi aku ka laser pulse ultrashort. ʻO nā lasers pulse Ultrashort he mau lasers mode-locked kokoke, akā hiki i ka hopena hoʻololi loaʻa ke hana i nā pulse ultrashort.
B. Ke ʻano o ka laser wikiwiki loa
1. Hiki i nā lasers Ti-sapphire, ʻo ka maʻamau Kerr lens mode-locked, ke hana i nā pulse pōkole e like me 5 fs i ka lōʻihi. ʻO ko lākou mana hoʻopuka awelika he mau haneli milliwatts, me nā helu hana hou pulse o, e ʻōlelo, 80MHz a me nā ʻumi o femtoseconds a i ʻole, a me nā lōʻihi pulse o nā ʻumi o femtoseconds a i ʻole, e hopena ana i kahi mana kiʻekiʻe loa. Akā, pono nā lasers titanium-sapphire i ka pumping light mai kekahi mau lasers kukui ʻōmaʻomaʻo, kahi e ʻoi aku ai ka paʻakikī a me ke kumukūʻai.
2. Aia nā ʻano lasers diode-pumped like ʻole e pili ana, no ka laʻana, ytterbium-doped (crystal a glass) a i ʻole chromium-doped laser crystals, ka mea maʻamau e hoʻohana i ka SESAM passive mode-locking. ʻOiai ʻaʻole pōkole ka lōʻihi o ka pulse o nā lasers diode-pumped e like me ka lōʻihi o ka pulse o nā lasers titanium-sapphire, hiki i nā lasers diode-pumped ke uhi i kahi ʻāpana ākea e pili ana i ka lōʻihi o ka pulse, ka wikiwiki o ka hana hou ʻana o ka pulse, a me ka mana awelika (e nānā ma lalo).
3. Hiki ke hoʻopaʻa ʻia nā lasers fiber e pili ana i nā fibers aniani i hoʻopili ʻia me nā mea honua laha ʻole, no ka laʻana, me ka hoʻohana ʻana i ka nonlinear polarization rotation a i ʻole SESAM. ʻOi aku ka palena o lākou ma mua o nā lasers bulk ma ke ʻano o ka mana awelika, ʻoi aku ka mana kiʻekiʻe, akā hiki ke hoʻohui maʻalahi ʻia me nā amplifiers fiber. Hāʻawi ka ʻatikala ma nā lasers fiber mode-locked i nā kikoʻī hou aku.
(4) hiki i nā lasers diode mode-locked ke lilo i mau mea hana hoʻohui a i ʻole nā lasers diode cavity waho, a hiki ke hana, passive a i ʻole mixed mode-locked. ʻO ka maʻamau, hana nā lasers diode mode-locked ma kahi kiʻekiʻe (mau tausani megahertz) pulse repetition rate ma kahi ikehu pulse waena.
Hiki i nā oscillators laser Ultrafast ke lilo i ʻāpana o nā ʻōnaehana laser ultrafast, hiki ke hoʻokomo pū i kahi amplifier ultrafast (e like me ka amplifier fiber optic) e hoʻonui i ka mana peak a me ka mana output awelika.
Ka manawa hoʻouna: Iune-20-2023