Balaadhka garaaca ee Laserrada garaaca

Balaadhka garaaca wadnaha ayaa loola jeedaa muddada garaaca wadnaha, iyo kala duwanaanshiyaha inta badan wuxuu ka bilaabmaa nanoseconds (ns, 10^-9ilbidhiqsiyo) ilaa femtose seconds (fs, 10^-15ilbiriqsi). Laser Pulsed leh ballacyada garaaca wadnaha kala duwan ayaa ku habboon codsiyada kala duwan:

- Balaadhka garaaca garaaca Gaaban (Picosecond/Second):

Ku habboon mashiinka saxda ah ee alaabta jilicsan (tusaale, galaas, sapphire) si loo yareeyo dildilaaca.

Balaadhka garaaca garaaca dheer ( Nanosecond): Ku haboon goynta birta, alxanka, iyo codsiyada kale ee saamaynta kulaylka looga baahan yahay.

- Femtosecond Laser: Waxaa loo isticmaalaa qalliinnada indhaha (sida LASIK) sababtoo ah waxay samayn kartaa jeexid sax ah oo waxyeello yar u geysanaysa unugyada ku wareegsan.

- Ultrashort Pulses: Waxaa loo isticmaalaa in lagu barto hababka firfircoon ee ultrafast, sida gariirka molecular iyo falcelinta kiimikada.

Balaadhka garaaca wadnaha wuxuu saameeyaa waxqabadka laysarka, sida awooda ugu sarreysa (P_{ugu sarreysa}= tamarta garaaca wadnaha / ballaca garaaca wadnaha. Baaxadda garaaca wadnaha oo gaaban, waxay sare u qaadeysaa awoodda ugu sarreysa ee isla tamarta hal garaaca wadnaha.) Waxa kale oo ay saameyn ku yeelataa saamaynta kulaylka: ballacyada garaaca wadnaha ee dheer, sida nanoseconds, waxay keeni kartaa kulaylka kulaylka ee alaabta, taasoo keenta dhalaal ama waxyeello kulayl; ballacyada garaaca garaaca wadnaha gaaban, sida picoseconds ama femtoseconds, waxay suurtagelisaa "wax ka qabashada qabow" oo leh hoos u dhac ku yimid aagagga kuleylku saameeyay.

Laysarka fiberku waxay caadi ahaan xakameeyaan oo hagaajiyaan ballaca garaaca wadnaha iyagoo isticmaalaya farsamooyinka soo socda:

1. Q-Beddelka: Waxa ay dhalisaa garaaca garaaca nanosecond iyada oo si xilliyo ah u beddesha khasaaraha resonator-ka si ay u soo saarto garaaca tamarta sare leh.

2. Qaab quful: Waxa ay dhalisaa garaaca garaaca ultrashort ee picosecond ama femtosecond iyada oo la midaynaysa hababka dhererka ee gudaha resonatorka.

3. Modulators ama Saamaynta Aan tooska ahayn: Tusaale ahaan, adigoo isticmaalaya Rotation Polarization Nononlinear (NPR) ee fiilooyinka ama nuugayaasha saturable si loo cadaadiyo ballaca garaaca wadnaha.