Kev piav qhia txog lub zog siablaser semiconductorkev loj hlob ib feem
Raws li kev ua haujlwm zoo thiab lub zog txuas ntxiv mus zoo dua, laser diodes (laser diodes tsav tsheb) yuav txuas ntxiv hloov cov thev naus laus zis ib txwm muaj, yog li hloov txoj kev ua tej yam thiab ua rau muaj kev txhim kho ntawm tej yam tshiab. Kev nkag siab txog kev txhim kho tseem ceeb hauv cov lasers semiconductor muaj zog kuj tseem txwv. Kev hloov pauv ntawm cov electrons mus rau lasers ntawm semiconductors tau pom thawj zaug hauv xyoo 1962, thiab ntau yam kev nce qib sib txuas lus tau ua raws li uas tau tsav kev nce qib loj hauv kev hloov pauv ntawm cov electrons mus rau cov lasers muaj txiaj ntsig zoo. Cov kev nce qib no tau txhawb nqa cov ntawv thov tseem ceeb los ntawm kev khaws cia optical mus rau optical networking mus rau ntau yam kev lag luam.
Kev tshuaj xyuas cov kev nce qib no thiab lawv cov kev nce qib sib sau ua ke qhia txog lub peev xwm rau kev cuam tshuam loj dua thiab dav dua hauv ntau qhov chaw ntawm kev lag luam. Qhov tseeb, nrog kev txhim kho tas mus li ntawm cov lasers semiconductor muaj zog siab, nws daim ntawv thov yuav ua kom nrawm dua, thiab yuav muaj kev cuam tshuam loj heev rau kev loj hlob ntawm kev lag luam.
Daim Duab 1: Kev sib piv ntawm qhov ci ntsa iab thiab Moore txoj cai ntawm cov lasers semiconductor muaj zog siab
Cov lasers solid-state uas siv diode-pumped thiabcov laser fiber ntau
Kev nce qib hauv cov lasers semiconductor muaj zog heev kuj tau ua rau muaj kev txhim kho ntawm cov thev naus laus zis laser downstream, qhov twg cov lasers semiconductor feem ntau yog siv los ua kom muaj zog (twj) cov siv lead ua doped (diode-pumped solid-state lasers) lossis cov fibers doped (fiber lasers).
Txawm hais tias cov semiconductor lasers muab cov zog laser zoo, me me, thiab pheej yig, lawv kuj muaj ob qhov kev txwv tseem ceeb: lawv tsis khaws cia lub zog thiab lawv qhov ci ntsa iab tsawg. Yeej, ntau daim ntawv thov xav tau ob lub lasers muaj txiaj ntsig; Ib qho yog siv los hloov hluav taws xob mus rau hauv lub laser emission, thiab lwm qhov yog siv los txhim kho qhov ci ntsa iab ntawm qhov emission ntawd.
Cov lasers solid-state uas siv diode-pumped.
Thaum xyoo 1980s lig, kev siv cov semiconductor lasers los twj cov solid-state lasers pib tau txais kev txaus siab rau kev lag luam. Diode-pumped solid-state lasers (DPSSL) txo qhov loj thiab qhov nyuaj ntawm cov thermal management systems (feem ntau yog cov cycle coolers) thiab gain modules, uas keeb kwm tau siv arc lamps los twj cov solid-state laser crystals.
Qhov wavelength ntawm lub semiconductor laser yog xaiv raws li qhov sib tshooj ntawm cov yam ntxwv spectral absorption nrog qhov nce nruab nrab ntawm lub solid-state laser, uas tuaj yeem txo qhov thermal load piv rau qhov dav dav emission spectrum ntawm lub teeb arc. Xav txog qhov nrov ntawm neodymium-doped lasers emitting 1064nm wavelength, 808nm semiconductor laser tau dhau los ua cov khoom lag luam zoo tshaj plaws hauv kev tsim semiconductor laser rau ntau tshaj 20 xyoo.
Qhov kev txhim kho ntawm lub diode pumping efficiency ntawm tiam thib ob tau ua tau los ntawm qhov ci ntsa iab ntawm ntau hom semiconductor lasers thiab lub peev xwm los tswj cov kab nqaim emission siv bulk Bragg gratings (VBGS) hauv nruab nrab xyoo 2000s. Cov yam ntxwv tsis muaj zog thiab nqaim spectral absorption ntawm ib ncig ntawm 880nm tau ua rau muaj kev txaus siab rau spectrally ruaj khov siab brightness twj diodes. Cov lasers ua tau zoo dua no ua rau nws muaj peev xwm twj neodymium ncaj qha ntawm qib laser sab saud ntawm 4F3 / 2, txo cov quantum deficits thiab yog li txhim kho cov qauv yooj yim extraction ntawm lub zog nruab nrab siab dua, uas yuav raug txwv los ntawm thermal lenses.
Los ntawm thaum ntxov xyoo caum thib ob ntawm lub xyoo pua no, peb tau pom qhov nce ntxiv ntawm lub zog ntawm ib hom 1064nm lasers, nrog rau lawv cov zaus hloov pauv lasers ua haujlwm hauv qhov pom thiab ultraviolet wavelengths. Muab lub neej ntev ntawm Nd: YAG thiab Nd: YVO4, cov haujlwm DPSSL Q-switched no muab lub zog siab thiab lub zog siab tshaj plaws, ua rau lawv zoo tagnrho rau kev ua cov khoom siv ablative thiab cov ntawv thov micromachining siab.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-06-2023