Ụkpụrụ na-arụ ọrụ nke semiconductor laser

Ụkpụrụ ọrụ nkesemiconductor laser

Nke mbụ, a na-ewebata ihe achọrọ maka laser semiconductor, ọkachasị gụnyere akụkụ ndị a:
1. Photoelectric arụmọrụ: gụnyere mkpochapụ ruru, ike linewidth na ndị ọzọ paramita, ndị a paramita na-emetụta kpọmkwem arụmọrụ nke semiconductor lasers na usoro nkwukọrịta.
2. Akụkụ ihe owuwu: dị ka nha ọkụ na nhazi, nkọwa njedebe mmịpụta, nha nrụnye na nha ndepụta.
3. Ogologo ogologo: Ogologo ogologo nke laser semiconductor bụ 650 ~ 1650nm, na izi ezi dị elu.
4. Threshold current (Ith) na arụ ọrụ ugbu a (lop): Ihe ndị a na-ekpebi ọnọdụ mmalite na ọnọdụ ọrụ nke laser semiconductor.
5. Ike na voltaji: Site n'ịtụ ike, voltaji na ugbu a nke laser semiconductor na-arụ ọrụ, PV, PI na IV curves nwere ike ịbịaru iji ghọta njirimara ọrụ ha.

Ụkpụrụ ọrụ
1. Nweta ọnọdụ: Mgbanwe nkesa nke ndị na-ebu ụgwọ na mpaghara lasing (mpaghara na-arụ ọrụ). N'ime semiconductor, ike nke eletrọn na-anọchi anya usoro ike ike fọrọ nke nta ka ọ bụrụ na-aga n'ihu. Ya mere, ọnụ ọgụgụ nke electrons na ala nke conduction band na elu ume ala ga-abụ nnọọ ibu karịa ọnụ ọgụgụ nke oghere na n'elu nke valence band na ala ume ala n'etiti abụọ ike band mpaghara iji nweta inversion nke urughuru nọmba. A na-enweta nke a site n'itinye mmachi dị mma na homojunction ma ọ bụ heterojunction na ịgbanye ndị na-ebu ndị dị mkpa n'ime oyi akwa na-arụ ọrụ iji kpalie electrons site na obere ike valence band na elu ike conduction band. Mgbe a ọnụ ọgụgụ dị ukwuu nke electrons na tụgharịa urughuru bi ala recombine na oghere, kpaliri emission emee.
2. Iji nweta n'ezie coherent kpaliri radieshon, mkpali radieshon ga-nri azụ ọtụtụ ugboro na ngwa anya resonator na-etolite laser oscillation, na resonator nke laser kpụrụ site eke cleavage elu nke semiconductor kristal dị ka a mirror, na-emekarị plated na njedebe nke ìhè na elu echiche multilayer dielectric film, na a ire ụtọ n'elu na-egosipụta plated n'elu. Maka oghere Fp (Fabry-Perot cavity) laser semiconductor, enwere ike ịrụ oghere FP n'ụzọ dị mfe site na iji ụgbọ elu mgbawa eke dị n'akụkụ ọdụ ụgbọ elu pn nke kristal.
(3) Iji mepụta oscillation kwụsiri ike, onye na-ahụ maka laser ga-enwe ike inye nnukwu uru zuru oke iji kwụọ ụgwọ maka mfu ngwa anya nke resonator kpatara na mfu nke nsonaazụ laser sitere na oghere oghere, ma na-abawanye ebe ọkụ mgbe niile n'ime oghere. Nke a ga-enwe ike zuru ezu nke ugbu a injection, ya bụ, e nwere ezuru urughuru nọmba inversion, na elu ogo nke urughuru nọmba inversion, ukwuu uru, ya bụ, ihe a chọrọ ga-ezute a ụfọdụ ugbu ọnụ ọnọdụ. Mgbe laser rutere n'ọnụ ụzọ, ìhè nwere otu ogologo waveleng nwere ike ịgbanye n'ime oghere ma gbasaa, n'ikpeazụ wee mepụta laser na mmepụta na-aga n'ihu.

Achọrọ arụmọrụ
1. Mgbanwe bandwidth na ọnụego: semiconductor lasers na teknụzụ modulation ha dị oke mkpa na nkwurịta okwu ngwa anya ikuku, na bandwit na ọnụego mgbanwe na-emetụta àgwà nkwurịta okwu ozugbo. Laser modulated n'ime ime (ozugbo modulated laser) dabara maka mpaghara dị iche iche na nkwurịta okwu fiber optic n'ihi na ọ na-ebufe ngwa ngwa na ọnụ ala dị ala.
2. Njirimara Spectral na njirimara modulation: Semiconductor kesara nzaghachi lasers (DFB laser) aghọwo ihe dị mkpa ọkụ na nkwurịta okwu fiber optic na oghere oghere n'ihi na ha magburu onwe spectral àgwà na modulation àgwà.
3. Ọnụ na mmepụta ihe: Semiconductor lasers kwesịrị inwe uru nke ọnụ ala dị ala na mmepụta oke iji gboo mkpa nke mmepụta na ngwa dị ukwuu.
4. Ike oriri na ntụkwasị obi: N'ọnọdụ ngwa ngwa dị ka ebe data data, lasers semiconductor chọrọ obere ike oriri na ntụkwasị obi dị elu iji hụ na arụ ọrụ kwụsiri ike ogologo oge.