Vim li cas laser diodes muaj plaub qhov kev ua tau zoo?

Laser diodes ua lub luag haujlwm tseem ceeb hauv kev lag luam hluav taws xob hluav taws xob, tshwj xeeb tshaj yog nyob rau hauv thaj chaw ntawm cov teeb liab kis tau tus mob vim lawv cov monochromaticity zoo, kev ua haujlwm siab, thiab cov yam ntxwv hloov ceev.
Lub hauv paus ntsiab lus ntawm laser diode
Laser diodes emit lub teeb raws li kev txhawb zog hluav taws xob, muaj peev xwm ntawm emitting beams ntawm me me txoj kab uas hla, mas oriented, thiab heev coherent lub teeb. Xyoo 1962, cov kws tshawb fawb Robert N. Hall thiab Nick Holonyak Jr. tau ua tiav lub laser diode. Ua tsaug rau "txhaj tshuaj" tam sim no hauv thaj av nquag, cov cuab yeej no tau ua tiav "laser" cov xwm txheej thiab ua tiav cov duab hluav taws xob zoo. Qhov txawv ntawm laser diode cim sawv cev thiab zoo tib yam PN hlws ris diodes yog hais tias nws muaj ib tug undoped intrinsic active cheeb tsam.
Cov qauv thiab kev ua haujlwm ntawm laser diode
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub laser diode nyob ntawm nws tus qauv PIN sab hauv - nrog P-hom thiab N-hom semiconductors ntawm ob qho kawg thiab ib qho tsis muaj qhov nruab nrab hauv nruab nrab. Thaum muaj kev tsis ncaj ncees rau pem hauv ntej, electrons thiab qhov raug txhaj rau hauv cheeb tsam nquag, thiab cov hluav taws xob dhia los ntawm cov khoom siv hluav taws xob mus rau valence band thiab rov sib txuas nrog qhov, tso tawm photons.
Cov txheej txheem no suav nrog peb lub tshuab hluav taws xob: nqus, spontaneous emission, thiab stimulated emission. Spontaneous emission yog lub emission ntawm lub teeb tsim los ntawm ntuj recombination, thaum stimulated emission yog generated thaum electrons hloov los ntawm ib tug siab zog theem mus rau ib tug qis zog theem nyob rau hauv qhov kev txiav txim ntawm photons. Txhua qhov xwm txheej photon tuaj yeem ua rau ob lub photons ntawm tib theem thiab wavelength.

Kev siv ntawm laser diodes
Laser diodes yog dav siv nyob rau hauv lub teb ntawm lub hwj chim electronics. Nws plays lub luag haujlwm tseem ceeb hauv optoelectronic scenes xws li laser luam ntawv, kho qhov muag disc nyeem ntawv thiab sau ntawv, fiber ntau optic kev sib txuas lus, thiab automated sensors. Tsis tas li ntawd, lawv ua lub luag haujlwm tseem ceeb hauv semiconductor manufacturing technologies xws li kev tswj cov cuab yeej hluav taws xob (xws li IGBT thiab MOSFET tsav tsheb), EDS, thiab lithography tsis muaj qhov ncauj qhov ntswg.
Qhov zoo thiab qhov tsis zoo
Laser diodes muaj ntau yam kev xaiv nyob rau hauv lub wavelength ntau ntawm 810 mus rau 1064 nanometers, thaum muaj ntau yam zoo xws li cov lus teb ceev thiab siab quantum efficiency. Txawm hais tias laser diodes muaj kev txwv xws li rhiab heev rau qhov kub thiab txias tawm tswv yim, bandgap shrinkage nyob rau hauv siab nce tam sim no, thiab tus nqi siab dua piv rau LEDs, lawv cov kev ua tau zoo tag nrho ua rau lawv zoo dua rau LEDs hauv high-precision daim ntaub ntawv.
Qhov txawv ntawm laser diodes thiab LEDs
Tsis zoo li cov LEDs uas vam khom rau cov emissions, laser diodes ua rau muaj zog emission los ntawm tam sim no thiab voltage, ua ib tug uniform thiab coherent lub teeb tso zis. Nrog kev pab ntawm laser diodes, zoo tswj kev siv kho qhov muag tau ua tiav, thaum LEDs yog tsim rau cov teeb pom kev zoo thiab cov khoom siv ntsuas.
Los ntawm kev txheeb xyuas qhov tob ntawm laser diode thev naus laus zis, nws tuaj yeem pom tias nws lub luag haujlwm hauv cov khoom siv hluav taws xob niaj hnub thiab kev sib txuas lus tau dhau los ua qhov tseem ceeb. Txawm hais tias tus nqi ntawm laser diodes yog tus nqi siab, lawv cov txiaj ntsig kev ua tau zoo yog pom tseeb hauv high-end precision daim ntaub ntawv, thiab lawv yuav tsum tau mus txuas ntxiv ua si lub peev xwm loj hauv kev lag luam optoelectronics yav tom ntej.