Webataeriri lasers pulsed
A na-eji eriri pulsed laser eme ihengwaọrụ laserndị na-eji eriri e tinyere ion ụwa dị ụkọ (dịka ytterbium, erbium, thulium, wdg) dị ka ihe na-enye uru. Ha nwere ihe na-enye uru, oghere resonant optical, na isi iyi mgbapụta. Teknụzụ mmepụta pulse ya gụnyere teknụzụ Q-switching (ọkwa nanosecond), mkpọchi ọnọdụ na-arụ ọrụ (ọkwa picosecond), mkpọchi ọnọdụ na-adịghị mma (ọkwa femtosecond), na teknụzụ olu ike oscillation (MOPA).
Ngwa ụlọ ọrụ mmepụta ihe na-ekpuchi ịkpụ ígwè, ịgbado ọkụ, nhicha laser na ịkpụ batrị lithium TAB n'ọhịa ike ọhụrụ, yana ike mmepụta ọtụtụ ụdị na-eru ọkwa puku-watt iri. N'ọhịa lidar, a na-etinye laser pulsed 1550nm, yana ike mkpali dị elu na atụmatụ nchekwa anya, na sistemụ radar nke na-agbagharị na nke na-etinye ụgbọala.
Ụdị ngwaahịa ndị bụ isi gụnyere ụdị Q-switched, ụdị MOPA na eriri ike dị elulaser pulsedNkeji:
1. Laser eriri Q-switched: Ụkpụrụ nke Q-switching bụ ịgbakwunye ngwaọrụ a na-agbanwe agbanwe n'ime laser ahụ. N'ọtụtụ oge, laser ahụ na-enwe nnukwu mfu ma ọ fọrọ nke nta ka ọ ghara ịpụta ìhè. N'ime obere oge, ibelata mfu nke ngwaọrụ ahụ na-eme ka laser ahụ nwee ike ịpụta obere mfu dị oke njọ. Enwere ike nweta laser eriri Q-switched ma ọ bụ na-arụsi ọrụ ike ma ọ bụ na-enweghị ihe ọ bụla. Teknụzụ na-arụ ọrụ na-agụnyekarị ịgbakwunye ihe na-eme ka ike dịkwuo n'ime oghere iji chịkwaa mfu nke laser ahụ. Usoro ndị na-adịghị arụ ọrụ na-eji ihe ndị na-amịkọrọ mmiri ma ọ bụ mmetụta ndị ọzọ na-abụghị nke ahịrị dịka mgbasa Raman na-akpali akpali na mgbasa Brillouin na-akpali akpali iji mepụta usoro nhazi Q. Mkpụrụ ndụ ndị a na-emepụtakarị site na usoro mgbanwe Q dị na ọkwa nanosecond. Ọ bụrụ na a ga-emepụta mkpụmkpụ mfu, enwere ike ime ya site na usoro mkpọchi ụdị.
2. Laser eriri e ji agbachi agbachi: Ọ nwere ike imepụta pulses ultrashort site na ụzọ mkpọchi ọnọdụ ma ọ bụ ụzọ mkpọchi ọnọdụ passive. N'ihi oge nzaghachi nke modulator, obosara pulse nke mkpọchi ọnọdụ na-arụ ọrụ na-abụkarị na ọkwa picosecond. Mkpọchi ọnọdụ passive na-eji ngwaọrụ mkpọchi ọnọdụ passive, nke nwere oge nzaghachi dị mkpirikpi ma nwee ike ịmepụta pulses na nha femtosecond.
Nke a bụ obere okwu mmalite maka ụkpụrụ nke mkpọchi ebu.
E nwere ọtụtụ ụdị ogologo oge n'ime oghere resonant laser. Maka oghere dị ka mgbaaka, oge ugboro nke ụdị ogologo oge hà nhata /CCL, ebe C bụ ọsọ nke ìhè na CL bụ ogologo ụzọ anya nke ìhè mgbaama na-agagharị otu njem gburugburu n'ime oghere ahụ. N'ikwu ya n'ozuzu, bandwit gain nke laser eriri dị oke ibu, ọtụtụ ụdị ogologo oge na-arụkwa ọrụ n'otu oge. Ọnụọgụ ụdị niile nke laser nwere ike ịnabata dabere na oge ogologo oge ∆ν na bandwit gain nke etiti uru. Ka oge ogologo oge nke etiti ogologo oge ahụ dị obere, otú ahụ ka bandwit gain nke etiti ahụ ka ukwuu, a pụkwara ịkwado ụdị ogologo oge. N'aka nke ọzọ, obere.
3. Laser Quasi-continuous (QCW laser): Ọ bụ ụdị ọrụ pụrụ iche n'etiti laser ebili na-aga n'ihu (CW) na laser pulsed. Ọ na-enweta ike dị elu ozugbo site na nrụgide ogologo oge (usoro ọrụ na-abụkarị ≤1%) ma na-ejigide ike dị ala. Ọ na-ejikọta nkwụsi ike nke laser na-aga n'ihu na uru ike kachasị elu nke laser pulsed.
Ụkpụrụ teknụzụ: modulu QCW lasers ibu modulation na-aga n'ihulasersekit iji belata laser na-aga n'ihu ka ọ bụrụ usoro mkpali okirikiri dị elu, na-enweta mgbanwe dị iche iche n'etiti ụdị mkpali na-aga n'ihu na ụdị mkpali. Isi ihe dị na ya bụ usoro "mgbawa nwa oge, ogologo oge oyi". Ịjụ oyi na oghere pulse na-ebelata mkpokọta okpomọkụ ma na-ebelata ihe egwu nke mgbanwe okpomọkụ ihe.
Uru na atụmatụ: Njikọta ụdị abụọ: Ọ na-ejikọta ike kachasị elu nke ụdị pulse (ruo ugboro 10 nkezi ike nke ụdị na-aga n'ihu) yana arụmọrụ dị elu na nkwụsi ike nke ụdị na-aga n'ihu.
Ojiji ike dị ala: Ọganihu mgbanwe elektrọnik dị elu na obere ọnụ ahịa ojiji ogologo oge.
Ogo ọkụ: Ogo ọkụ dị elu nke laser eriri na-akwado obere igwe eji arụ ọrụ nke ọma.
Oge ozi: Nọvemba-10-2025