Pulse Laulā o Pulsed Lasers

ʻO ka laulā o ka puʻupuʻu e pili ana i ka lōʻihi o ka pulse, a ʻo ka laulā maʻamau mai nā nanoseconds (ns, 10).^-9kekona) i nā femtoseconds (fs, 10^-15kekona). ʻO nā laser Pulsed me nā ākea pulse ʻokoʻa kūpono no nā noi like ʻole:

- Laulā Puʻupuʻu Pōkole (Picosecond/Femtosecond):

He kūpono no ka hana ʻana i nā mea palupalu (e laʻa, aniani, sapphire) e hōʻemi i nā māwae.

- Long Pulse Width (Nanosecond): He kūpono no ka ʻoki metala, wili, a me nā noi ʻē aʻe kahi e pono ai nā hopena wela.

- Laser Femtosecond: Hoʻohana ʻia i nā ʻokiʻoki maka (e like me LASIK) no ka mea hiki iā ia ke ʻoki pololei me ka liʻiliʻi o ka pōʻino i ka ʻiʻo a puni.

- Ultrashort Pulses: Hoʻohana ʻia e aʻo i nā kaʻina hana ikaika ultrafast, e like me nā haʻalulu molekala a me nā hopena kemika.

Hoʻopili ka laulā pulse i ka hana o ka laser, e like me ka mana kiʻekiʻe (P_piko= ikehu puʻupuʻu/ākea puʻupuʻu. ʻO ka pōkole o ka laulā pulse, ʻoi aku ka kiʻekiʻe o ka mana kiʻekiʻe no ka ikehu puʻupuʻu hoʻokahi.) Hoʻopili pū ia i nā hopena wela: nā laula pulse lōʻihi, e like me nā nanoseconds, hiki ke hoʻoulu i ka hoʻoulu ʻana i ka wela i nā mea, e alakaʻi ai i ka hoʻoheheʻe ʻana a i ʻole ka wela; ʻO nā laula puʻupuʻu pōkole, e like me nā picoseconds a i ʻole femtoseconds, hiki ke "hoʻoponopono anuanu" me nā wahi i hoʻemi ʻia i ka wela.

Hoʻoponopono maʻamau nā laser fiber a hoʻoponopono i ka laulā pulse me ka hoʻohana ʻana i nā ʻenehana penei:

1. Q-Switching: Hoʻoulu i nā pulu nanosecond ma o ka hoʻololi ʻana i nā poho resonator i kēlā me kēia manawa e hana i nā puʻupuʻu ikaika kiʻekiʻe.

2. Hoʻopaʻa ʻano: Hoʻopuka i nā puʻupuʻu ultrashort picosecond a i ʻole femtosecond ma o ka hoʻonohonoho ʻana i nā ʻano lōʻihi i loko o ka resonator.

3. Nā Modulators a i ʻole nā ​​hopena nonlinear: No ka laʻana, me ka hoʻohana ʻana i ka Nonlinear Polarization Rotation (NPR) i loko o nā fibers a i ʻole nā ​​mea hoʻoheheʻe saturable e kaomi i ka laulā pulse.