Pulse obosara njikwa nkenjikwa pulse laserteknụzụ
Njikwa pulse nke laser bụ otu n'ime isi njikọ dị na yateknụzụ laser, nke na-emetụta kpọmkwem arụmọrụ na mmetụta ngwa nke laser. Akwụkwọ a ga-ahazi n'usoro nhazi njikwa obosara usu, njikwa ugboro ugboro na teknụzụ modulation metụtara ya, ma gbalịsie ike ịbụ ọkachamara, nke zuru oke na ezi uche.
1. Echiche nke obosara usu
Ogologo Pulse nke laser na-ezo aka na ogologo oge nke ụda laser, nke bụ isi ihe dị mkpa iji kọwaa njirimara oge nke mmepụta laser. Maka ultra-short pulse lasers (dị ka nanosecond, picosecond na femtosecond lasers), ka obosara pulse dị mkpụmkpụ, na-eme ka ike dị elu dị elu, na obere mmetụta okpomọkụ, nke dabara maka nhazi nkenke ma ọ bụ nyocha sayensị.
2. Ihe na-emetụta obosara pulse laser A na-emetụta ọtụtụ ihe dị iche iche, karịsịa gụnyere akụkụ ndị a:
a. Àgwà ndị nke inweta ọkara. Dị iche iche nke uru media nwere pụrụ iche ike larịị Ọdịdị na fluorescence ndụ, nke kpọmkwem na-emetụta ọgbọ na usu obosara nke laser usu. Dịka ọmụmaatụ, lasers steeti siri ike, Nd: YAG kristal na Ti: kristal sapphire bụ mgbasa ozi laser siri ike. Laser gas, dị ka carbon dioxide (CO₂) lasers na helium-neon (HeNe) lasers, na-emekarị na-emepụta dịtụ ogologo pulses n'ihi na ha molekụla Ọdịdị na obi ụtọ ala Njirimara; Laser semiconductor, site n'ịchịkwa oge nchikota nke ebu, nwere ike nweta obosara pulse sitere na nanoseconds ruo picoseconds.
Nhazi nke oghere laser nwere mmetụta dị ịrịba ama na obosara usu, gụnyere: ogologo oghere ahụ, ogologo nke oghere laser na-ekpebi oge achọrọ maka ìhè iji mee njem ugboro ugboro n'ime oghere ahụ, oghere dị ogologo ga-eduga n'ogologo obosara nke ụbụrụ, ebe oghere dị mkpụmkpụ na-eme ka ọgbọ nke ultra-short pulses; Ntụleghachi: A reflector na elu reflectance nwere ike ime ka photon njupụta na oghere, si otú eme ka uru mmetụta, ma oke elu reflectance nwere ike ime ka ọnwụ na oghere na-emetụta pulse obosara kwụsie ike; Ọnọdụ nke ihe nrịba ama na ọnọdụ nke uru na-enweta n'ime oghere ga-emetụtakwa oge mmekọrịta dị n'etiti photon na uru uru, wee metụta obosara usu.
c. Teknụzụ mgbanwe Q na teknụzụ mkpọchi mode bụ ụzọ abụọ dị mkpa iji ghọta mmepụta laser pulse na ụkpụrụ obosara usu.
d. Isi iyi mgbapụta na ọnọdụ mgbapụta Ike nkwụsi ike nke isi iyi mgbapụta na nhọrọ nke ọnọdụ mgbapụta nwekwara mmetụta dị mkpa na obosara pulse.
3. Usoro nchịkwa obosara nke usu nkịtị
a. Gbanwee ọnọdụ ọrụ nke laser: ụdị ọrụ nke laser ga-emetụta obosara usu ya ozugbo. Enwere ike ịchịkwa obosara usu site n'ịgbanwe ihe ndị na-esonụ: ugboro na ike nke isi iyi mgbapụta, ntinye ike nke isi iyi mgbapụta, na ogo nke ọnụọgụgụ ọnụọgụgụ mmadụ na-enweta ọkara; Ngosipụta nke oghere mmepụta na-agbanwe nzaghachi nzaghachi na resonator, si otú ahụ na-emetụta usoro nhazi ụbụrụ.
b. Control pulse udi: na-edochaghị anya mezie obosara usu site na-agbanwe udi nke laser usu.
c. Mgbanwe dị ugbu a: Site n'ịgbanwe mmepụta ugbu a nke ọkụ eletrik iji mezie nkesa nke ike eletrọnịkị na usoro laser, wee gbanwee obosara usu. Usoro a nwere ọsọ nzaghachi ngwa ngwa ma dabara adaba maka ọnọdụ ngwa nke chọrọ mgbanwe ngwa ngwa.
d. Mgbanwe mgbanwe: site na ịchịkwa ọnọdụ mgbanwe nke laser iji dozie obosara usu.
e. Njikwa okpomọkụ: mgbanwe okpomọkụ ga-emetụta nhazi ọkwa ike eletrik nke laser, si otú ahụ na-emetụta obosara usu na-apụtaghị ìhè.
f. Jiri teknụzụ modulation: Nkà na ụzụ mgbanwe bụ ụzọ dị irè isi chịkwaa obosara ụbụrụ nke ọma.
Mgbanwe nke laserteknụzụ bụ teknụzụ na-eji laser dị ka ihe na-ebu ma na-ebunye ozi na ya. Dị ka mmekọrịta na laser nwere ike kewaa esịtidem modulation na mpụga modulation. Mgbanwe nke ime n'ime na-ezo aka na ọnọdụ mgbanwe nke a na-ebufe mgbaàmà modulated n'ime usoro oscillation laser iji gbanwee paramita oscillation laser wee si otú ahụ gbanwee àgwà mmepụta laser. Mgbanwe nke mpụga na-ezo aka na ọnọdụ mgbanwe nke a na-agbakwunye mgbama modul mgbe emechara laser, a na-agbanwekwa ihe ndị na-emepụta ihe na-emepụta na-enweghị mgbanwe mgbanwe oscillation nke laser.
A nwekwara ike ịkewa teknụzụ mgbanwe mgbanwe dị ka ụdị modulation nke ụgbọelu si dị, gụnyere mgbanaka analọgụ, mgbanwe pulse, modulation dijitalụ (modulation code pulse); Dị ka usoro ihe ngbanwe ahụ si dị, a na-ekewa ya n'ime mgbanwe nke ike na nhazi usoro.
modulator ike: A na-achịkwa obosara usu site n'ịgbanwe mgbanwe nke ọkụ ọkụ laser.
Modulator usoro: A na-edozi obosara usu site n'ịgbanwe oge nke ọkụ ọkụ.
Ampilifaya akpọchi agbachi agba: Site na ngbanwe njupụta nke agba agbachi agbachi, enwere ike idozi obosara usu laser nke ọma.
Oge nzipu: Mar-24-2025