I-laser eluhlaza okwesibhakabhaka enamandla aphezulu angama-457nm

I-457nm enamandla aphezulu e-frequency enyeileza eluhlaza okwesibhakabhaka
Uyilo lwendlela ebonakalayo ye-laser eluhlaza okwesibhakabhaka enamandla aphezulu angama-457nm ene-frequency enye
Umthombo wepompo osetyenzisiweyo yi-30 W fiber-coupled laser diode array. Okwesibini, i-ring resonator ikhethwa ukuze kukhethwe imo. Ubuso bokugqibela buphonswa nge-5 mm ubude ye-Nd3+-doped yttrium vanadate (Nd:YVO4) crystal enoxinzelelo lwe-0.1%. Emva koko, nge-I-type phase-matched lithium triborate (LBO) crystal cavity, i-harmonic yesibini iveliswa ukuze kufezekiswe i-457nm high-power single-frequency.ilezaimveliso. Xa amandla epompo engama-30 W, amandla okukhupha elaser ye-457nm single-frequency yi-5.43 W, ubude be-wavelength ephakathi yi-457.06 nm, ukusebenza kakuhle kokuguqulwa kokukhanya ukuya ekukhanyeni yi-18.1%, kwaye uzinzo lwamandla ngaphakathi kweyure e-1 yi-0.464%. Ilaser ye-457nm isebenza kwimo yesiseko ngaphakathi kwe-resonator. Izinto zomgangatho we-beam ecaleni kwezikhokelo ze-x kunye ne-y yi-1.04 kunye ne-1.07 ngokwahlukeneyo, kwaye i-ellipticity yendawo yokukhanya yi-97%.

Inkcazo yendlela ebonakalayo yokukhanya okuluhlaza okwesibhakabhaka okunamandla aphezului-laser ye-frequency enye
Umthombo wepompo usebenzisa i-optical fiber-coupledidiode yelaser ye-semiconductoruluhlu olune-wavelength ephakathi ye-808 nm, amandla okukhupha aqhubekayo angama-30 W, kunye nobubanzi be-fiber core ye-400 μm, kunye ne-numerical aperture ye-0.22.
Isibane sepompo sidityaniswa size sijoliswe ziilensi ezimbini zeplano-convex ezinobude obuyi-20 mm, emva koko singene kwi-ikristale yelaser. Ikristale yelaser yikristale ye-3 mm × 3 mm × 5 mm Nd:YVO4 ene-doping concentration ye-0.1%, kunye neefilimu ze-808 nm kunye ne-914 nm ezichasene nokukhanya ezibekwe kuzo zombini iziphelo, kwaye ikristale isongelwe nge-indium foil kwaye ibekwe kwisixhobo sokubopha ngobhedu. Isixhobo sokubopha ngobhedu silawulwa ngokuchanekileyo bubushushu yi-semiconductor cooler kwaye sibekwe kwi-15℃.
I-resonator yingxondorha yesangqa esinezipili ezine eyenziwe yi-M1, M2, M3, kunye ne-M4.
I-M1 sisipili seplane esineefilimu ezichasene nokukhanya ezingama-808 nm, 1064 nm, kunye ne-1342 nm (R<0.05%), kunye nefilimu ebonakalisa ukukhanya engama-914 nm (R>99.8%); I-M4 sisipili esikhupha ukukhanya esinefilimu ebonakalisa ukukhanya engama-914 nm (R>99.8%), 457 nm kunye ne-1064 nm, 1342 nm (R<0.02%); I-M2 kunye ne-M3 zombini zizipili zeplano-concave ezinerediyasi egobileyo engu-r = 100 mm, ezineefilimu ezichasene nokukhanya ezingama-1064 nm kunye ne-1342 nm (R<0.05%) kwiplane kunye neefilimu ezibonisa ukukhanya ezingama-914 nm kunye ne-457 nm (R>99.8%) kumphezulu ogobileyo.
Ipleyiti yesiqingatha-wamaza kunye nekristale ye-TGG ezibekwe kwindawo yemagnethi zombini zinefilimu ezichasene nokukhanya kwe-914 nm (R<0.02%). Ngokuzisa isixhobo esibonakalayo esingakwelinye icala esenziwe yi-TGG kunye nepleyiti yesiqingatha-samaza, i-laser inyanzelekile ukuba isebenze ngokungakwelinye icala kwi-ring resonator, ngaloo ndlela iqinisekisa ukuba i-laser isebenza ngokuzinzileyo kwimeko ye-single-frequency. I-FP sisiqwenga esiqhelekileyo esinobukhulu be-2 mm, esinokubonakalisa okuphindwe kabini okungama-50%, kwaye senza ukunciphisa okwesibini kokusebenza kwe-single-frequency ye-laser kwindawo evulekileyo. Ikristale ye-LBO ikhethwa njengekristale ephinda kabini i-frequency, enobukhulu be-3 mm × 3 mm × 15 mm, kwaye igqunywe ngeefilimu ezichasene nokukhanya kwe-914 nm kunye ne-457 nm (R<0.02%), kunye nokulinganisa isigaba se-I, i-cutting angle θ = 90°, φ = 21.9°.