Shyiraho imirasire ya laser ikoresha fibre pulsed

Shyiraholaser zikoresha fibre pulsed

Laser zikoresha fibre pulsed niibikoresho bya laserzikoresha imigozi irimo iyoni z’isi zidasanzwe (nka ytterbium, erbium, thulium, nibindi) nk'uburyo bwo gukuramo umusaruro. Zigizwe n'uburyo bwo gukuramo umusaruro, umwobo w’ikirahure cy’amajwi, n'isoko ry’ipompo. Ikoranabuhanga ryayo ryo gukuramo umwuka rigizwe ahanini n'ikoranabuhanga rya Q-switching (urwego rwa nanosecond), uburyo bwo gufunga imikorere (urwego rwa picosecond), uburyo bwo gufunga imikorere butica (urwego rwa femtosecond), n'ikoranabuhanga rya main oscillation power amplification (MOPA).

Ibikorwa by'inganda bikubiyemo gukata ibyuma, gusudira, gusukura hakoreshejwe laser no gukata TAB ya bateri ya lithium mu rwego rushya rw'ingufu, aho imbaraga zo gusohora ibintu byinshi zigera ku rugero rwa watts ibihumbi icumi. Mu rwego rwa lidar, lasers za pulsed za 1550nm, zifite imbaraga nyinshi zo gukanda no kurinda amaso, zikoreshwa muri sisitemu za radar zishyirwa ku binyabiziga no mu modoka.

Ubwoko bw'ibicuruzwa by'ingenzi burimo ubwoko bwa Q-switched, ubwoko bwa MOPA na fibre ifite imbaraga nyinshilaser zikoresha pulseIcyiciro:

1. Lazeri ya Q-switched fiber: Ihame rya Q-switching ni ukongeramo igikoresho gishobora guhindurwamo igihombo muri lazeri. Mu bihe byinshi, lazeri igira igihombo kinini kandi nta rumuri rusohoka. Mu gihe gito cyane, kugabanya igihombo cy'igikoresho bituma lazeri isohora umuvuduko mugufi cyane. Lazeri ya Q-switched fiber irashobora kugerwaho haba mu buryo bufatika cyangwa butunguranye. Ikoranabuhanga rikora rikunze gushyiraho modulator y'ingufu imbere mu mwobo kugira ngo igenzure igihombo cya lazeri. Ubuhanga butagira imbaraga bukoresha ibintu bigabanya imbaraga cyangwa izindi ngaruka zitari umurongo nko gukwirakwiza Raman no gukwirakwiza Brillouin kugira ngo habeho uburyo bwa Q-modulation. Imivuduko muri rusange ikorwa n'uburyo bwa Q-switching iri ku rwego rwa nanosecond. Niba imivuduko migufi igomba gukorwa, ishobora kugerwaho binyuze mu buryo bwa mode-locking.

2. Lazeri ya fiber ifunguye mu buryo bwa mode: Ishobora gukora pulses ngufi cyane binyuze mu buryo bwa active mode-locking cyangwa passive mode-locking. Bitewe n'igihe cyo gusubiza cya modulator, ubugari bwa pulse bukorwa na active mode-locking muri rusange buri ku rwego rwa picosecond. Passive mode-locking ikoresha ibikoresho bya passive mode-locking, bifite igihe gito cyane cyo gusubiza kandi bishobora gukora pulses ku gipimo cya femtosecond.

Dore incamake y'ihame ryo gufunga ifu.

Hari uburyo bwinshi bwo kurekura urumuri mu mwobo wa laser resonant. Ku mwobo ufite ishusho y'uruziga, igihe cy'impinduka z'uburyo bwo kurekura urumuri kingana na /CCL, aho C ari umuvuduko w'urumuri na CL ari uburebure bw'inzira y'urumuri rw'ikimenyetso rugenda urugendo rumwe n'izunguruka muri uwo mwobo. Muri rusange, uburyo bwo kurekura urumuri rwa fiber lasers ni bunini, kandi umubare munini w'uburyo bwo kurekura rukora icyarimwe. Umubare wose w'uburyo laser ishobora kwakira uterwa n'igihe cy'uburyo bwo kurekura urumuri ∆ν n'uburyo bwo kurekura urumuri rw'uburyo bwo kurekura urumuri. Uko igihe cy'uburyo bwo kurekura urumuri ari gito, ni ko uburyo bwo kurekura urumuri rw'uburyo bwo kurekura urumuri ari bwinshi, kandi uburyo bwo kurekura burashoboka. Ibinyuranye n'ibyo, ni uko uburyo bwo kurekura urumuri ari bwinshi, kandi uburyo bwo kurekura burashoboka.

3. Lazeri ihoraho (QCW laser): Ni uburyo bwihariye bwo gukora hagati ya lazeri ihoraho (CW) na lazeri ihumeka. Itanga ingufu nyinshi ako kanya binyuze mu mihindagurikire y’igihe kirekire (ubusanzwe ≤1%) mu gihe igumana imbaraga nkeya. Ihuza ubushobozi bwa lazeri ihamye n’ubushobozi bw’ikirenga bwa lazeri ihumeka.

Ihame rya tekiniki: Module za modulation za laser za QCW mu buryo bukomezalaseruruziga rwo guca imirasire ya laser ihoraho mu buryo bworoshye bwo guhinduranya imirasire, bigatuma habaho guhinduranya hagati y’uburyo bwo gukomeza n’ubwo guteranya imirasire. Ikintu cy’ingenzi cyayo ni uburyo bwo "gukonjesha igihe gito, igihe kirekire". Gukonjesha mu cyuho cy’imirasire bigabanya ubwiyongere bw’ubushyuhe kandi bikagabanya ibyago byo guhinduka k’ubushyuhe bw’ibintu.

Ibyiza n'imikorere: Guhuza uburyo bubiri: Bihuza imbaraga z'ikirenga za pulse mode (kugeza ku nshuro 10 z'imbaraga zisanzwe za common mode) hamwe n'ubushobozi bwo hejuru n'ubudahangarwa bwa common mode.

Ingufu nke zikoreshwa: Ikoreshwa neza cyane mu guhindura amashanyarazi n'ikiguzi gito cyo kuyikoresha mu gihe kirekire.

Ubwiza bw'umurabyo: Ubwiza bwo hejuru bwa laser za fibre bushyigikira imashini ntoya.