Laser yebhuruu ine simba guru re457nm ine frequency imwe chete

457nm ine simba guru rema frequency rimwe chetelaser yebhuruu
Dhizaini yenzira yemaziso ye457nm ine simba guru re single-frequency blue laser ine frequency imwe chete
Pombi inoshandiswa i30 W fiber-coupled laser diode array. Chechipiri, ring resonator inosarudzwa kuti isarudze mode. Chiso chekupedzisira chinopombwa nekristaro yeNd3+-doped yttrium vanadate (Nd:YVO4) ine urefu hwe5 mm ine concentration ye0.1%. Zvadaro, kuburikidza neI-type phase-matched lithium triborate (LBO) crystal cavity, harmonic yechipiri inogadzirwa kuti iwane 457nm high-power single-frequency.laserkubuda. Kana simba repombi riri 30 W, simba rekubudisa re457nm single-frequency laser iri 5.43 W, wavelength yepakati iri 457.06 nm, kushanda kwekuchinja chiedza kubva kuchiedza kuenda kuchiedza kuri 18.1%, uye kugadzikana kwesimba mukati meawa imwe chete kuri 0.464%. Iyo 457nm laser inoshanda mu fundamental mode mukati me resonator. Zvinhu zvemhando yemwaranzi zviri munzira dze x ne y zviri 1.04 ne 1.07 zvichiteerana, uye ellipticity yenzvimbo yechiedza iri 97%.

Tsananguro yenzira yechiedza chebhuruu chine simba gurulaser ine mafrequency maviri
Pombi yacho inoshandisa fiber ye optical yakabatanasemiconductor laser diodearray ine urefu hwemafungu epakati pe808 nm, simba rinobuda risingaperi re30 W, uye dhayamita yepakati pefiber ye400 μm, ine aperture yenhamba ye0.22.
Mwenje wepombi unounganidzwa uye unotariswa nemalenzi maviri eplano-convex ane urefu hwe20 mm uye wobva wawira pakristaro yelaser. Kristaro yelaser ine kristaro ye3 mm × 3 mm × 5 mm Nd:YVO4 ine doping concentration ye0.1%, ine mafirimu e808 nm uye 914 nm anodzivirira kupenya akaiswa kumativi ese, uye kristaro yacho inoputirwa ne indium foil yoiswa mu copper clamping fixture. Copper clamping fixture inodzorwa nekupisa ne semiconductor cooler uye inoiswa pa15℃.
Resonator idenderedzwa rine magirazi mana rine M1, M2, M3, uye M4.
M1 igirazi replane rine mafirimu e808 nm, 1064 nm, uye 1342 nm anodzivisa kupenya (R<0.05%), uye firimu re914 nm rinoratidza kupenya (R>99.8%); M4 igirazi rinoburitsa kupenya rine firimu re914 nm rinoratidza kupenya (R>99.8%), 457 nm uye 1064 nm, 1342 nm rinoratidza kupenya (R<0.02%); M2 neM3 ese ari maviri magirazi eplano-concave ane curvature radius ye r = 100 mm, ane mafirimu e1064 nm uye 1342 nm anorambidza kupenya (R<0.05%) ari muplane uye mafirimu e914 nm uye 457 nm anoratidza kupenya (R>99.8%) ari pamusoro pe concave.
Purati yehafu-wave nekristaro yeTGG yakaiswa mumunda wemagineti zvese zvine mafirimu e914 nm anodzivirira kupenya (R<0.02%). Nekuunza mudziyo we optical unidirectional unoumbwa neTGG nepurati yehafu-wave, laser inomanikidzwa kumhanya unidirectionally mu ring resonator, zvichiita kuti laser ishande zvakanaka mune imwe-frequency state. FP chidimbu chakajairika chine ukobvu hwe2 mm, ine double-sided coated reflectivity ye50%, uye inoita secondary decrease ye single-frequency operation ye laser iri mu cavity. Kristaro yeLBO inosarudzwa se frequency doubling crystal, ine saizi ye3 mm × 3 mm × 15 mm, uye yakafukidzwa ne914 nm uye 457 nm anti-reflection films (R<0.02%), ine I-type phase matching, cutting angle θ = 90°, φ = 21.9°.