Ka laulā o ka Pulse o nā Lasers Pulsed

ʻO ka laulā o ka pulse 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). He kūpono nā lasers pulsed me nā laulā pulse like ʻole no nā noi like ʻole:

- Ka laulā o ka Pulse pōkole (Picosecond/Femtosecond):

Kūpono no ka mīkini pololei ʻana i nā mea palupalu (e like me ke aniani, ka sapeiro) e hōʻemi i nā māwae.

- Ka laulā Pulse lōʻihi (Nanosecond): Kūpono no ka ʻoki ʻana i ka metala, ka hoʻoheheʻe ʻana, a me nā noi ʻē aʻe kahi e pono ai nā hopena wela.

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

- Nā Pulse Pōkole Loa: Hoʻohana ʻia e aʻo i nā kaʻina hana wikiwiki loa, e like me nā haʻalulu molekala a me nā hopena kemika.

Hoʻopilikia ka laulā pulse i ka hana o ka laser, e like me ka mana kiʻekiʻe (P_piko= ikehu pulse/laulā pulse. ʻO ka pōkole o ka laulā pulse, ʻo ke kiʻekiʻe o ka mana kiʻekiʻe no ka ikehu pulse hoʻokahi like.) Hoʻopilikia pū ia i nā hopena wela: ʻo nā laulā pulse lōʻihi, e like me nā nanoseconds, hiki ke hana i ka hōʻiliʻili wela i loko o nā mea, e alakaʻi ana i ka heheʻe ʻana a i ʻole ka hōʻino wela; ʻo nā laulā pulse pōkole, e like me nā picoseconds a i ʻole femtoseconds, e hiki ai i ka "hana anu" me nā wahi i hoʻemi ʻia i ka wela.

ʻO ka maʻamau, hoʻokele a hoʻoponopono nā lasers fiber i ka laulā pulse me ka hoʻohana ʻana i nā ʻano hana penei:

1. Q-Switching: Hoʻopuka i nā pulse nanosecond ma ka hoʻololi pinepine ʻana i nā pohō resonator e hana i nā pulse ikehu kiʻekiʻe.

2. Mode-Locking: Hoʻopuka i nā pulse ultrashort picosecond a i ʻole femtosecond ma ka hoʻonohonoho ʻana i nā ʻano longitudinal 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 hoʻomoʻa saturable e hoʻopili i ka laulā pulse.