Hordhac
Iftiinka dhexe (MIR) ee inta u dhaxaysa 2-20 µm wuxuu faa'iido u leeyahay aqoonsiga kiimikaad iyo bayooloji sababtoo ah joogitaanka khadadka nuugista unugyada unugyada badan ee gobolkan spectral.Ilaha wareegga yar ee isku xiran oo leh dabool isku mar ah oo kala duwan oo MIR ah ayaa sii kordhin kara codsiyada cusub sida mirco-spectroscopy , femtosecond bamka-baaritaanka spectroscopy, iyo cabbirro xasaasi ah oo heersare ah ilaa hadda qorshayaal badan ayaa leh.
waxaa loo sameeyay si loo dhaliyo shucaaca MIR ee isku xidhan, sida xadhkaha xadhkaha iftiinka ee synchrotron, leysarka quantum cascade, ilaha supercontinuum, oscillators indhaha (OPO) iyo amplifiers parametric optical (OPA).Nidaamyadani dhammaantood waxay leeyihiin awoodooda iyo daciifnimadooda marka la eego kakanaanta, baaxadda, awoodda, hufnaanta, iyo muddada garaaca wadnaha.Waxaa ka mid ah, jiilka soo noqnoqda ee garaaca wadnaha (IDFG) ayaa soo jiidanaya dareenka sii kordhaya iyada oo ay ugu wacan tahay horumarinta awooda sare ee femtosecond 2 µm lasers kaas oo si wax ku ool ah u soo saari kara kiristaalo yar-yar oo aan oksaydh ahayn si ay u dhaliyaan awood sare oo ballaadhan oo isku xidhan iftiinka MIR.Marka la barbar dhigo OPO-yada sida caadiga ah loo isticmaalo, IDFG waxay ogolaataa dhimista kakanaanta nidaamka iyo kor u qaadida isku halaynta, maadaama baahida la isku waafajiyo laba alwaaxyo ama godad kala duwan oo sax ah ayaa meesha laga saaray.Ka sokow, wax-soo-saarka MIR-ku waa mid si dhex-dhexaad ah u ah waji-bakhshad (CEP) oo deggan IDFG.
Sawirka 1
Xajmiga gudbinta ee dhumucda 1-mm ee aan dahaarka lahaynBGse crystalwaxaa bixisay DIEN TECH.Gelitaanka ayaa muujinaya crystal-ka dhabta ah ee loo isticmaalay tijaabadan.
sawirka 2
Habaynta tijaabada ee jiilka MIR oo leh aBGse crystal.OAP, muraayadda dhidibka ka baxsan oo leh dhererka diiradda wax ku oolka ah ee 20 mm;HWP, saxan badh-mawjad;TFP, polarizer-filim khafiif ah;LPF, shaandheynta-dhaafka dheer.
Sannadkii 2010, biaxial chalcogenide cusub oo kiristaalo aan toos ahayn, BaGa4Se7 (BGse), ayaa la sameeyay iyadoo la adeegsanayo habka Bridgman-Stockbarger.Waxay leedahay daah-furnaan ballaaran oo u dhexeysa 0.47 ilaa 18 µm (sida ku cad sawirka 1) oo leh isku-beegyo aan toos ahayn oo d11 = 24.3 pm/V iyo d13 = 20.4 pm/V.Daaqadda daah-furnaanta ee BGse aad ayey uga ballaadhan tahay ZGP iyo LGS inkasta oo aan toos ahayn ay ka hooseyso ZGP (75 ± 8 pm/V).Si ka duwan GaSe, BGse sidoo kale waa la gooyn karaa xagal u dhigma wajiga la rabo oo waxay noqon kartaa mid dahaarka lidka ku ah.
Habaynta tijaabada waxa lagu sawiray sawirka 2(a).Wadida garaaca wadnaha ayaa markii hore laga soo saaray qaab guri lagu dhisay oo Kerr-lens ah oo quful Cr: ZnS oscillator leh polycrystalline Cr: ZnS crystal (5 × 2 × 9 mm3, gudbinta = 15% at 1908nm) Tm-doped fiber laser oo ah 1908nm.Murugada godka mawjadda taagan waxa ay keentaa 45-fs garaacyo ku shaqeeya celcelis ahaan 69 MHz oo leh awood celcelis ah 1 W marka la eego hirarka hirarka ee 2.4µm.Awoodda waxaa lagu kordhiyey 3.3 W guri-guri lagu dhisay laba-marxalad hal-mar polycrystalline Cr: ZnS amplifier (5 × 2 × 6 mm3, gudbinta = 20% at 1908nm iyo 5 × 2 × 9 mm3, gudbinta = 15% at 1908nm), iyo muddada garaaca garaaca wax-soo-saarka waxaa lagu cabbiraa guri-dhismay jiil-labaad-jiil-ilaaliye-la-xalin-xallin-celin indho-indhayn ah (SHG-FROG).
