Teknụzụ isi iyi laser maka mmetụta eriri anya Nkebi nke Abụọ

Teknụzụ isi iyi laser maka mmetụta eriri anya Nkebi nke Abụọ

2.2 Nzagharị otu ogologo ebili mmiriisi iyi laser

Mmezu nke laser otu ogologo ebili mmiri bụ isi iji chịkwaa njirimara anụ ahụ nke ngwaọrụ ahụ nalaseroghere (na-abụkarị ogologo oge etiti nke bandwit ọrụ), iji nweta njikwa na nhọrọ nke ọnọdụ ogologo oge na-agagharị agagharị n'ime oghere ahụ, iji mezuo ebumnuche nke ịhazi ogologo oge mmepụta. Dabere na ụkpụrụ a, na mbido afọ 1980, mmezu nke laser eriri a na-agbanwe agbanwe bụ isi site na iji grating diffraction reflective dochie ihu njedebe na-egosipụta nke laser ahụ, na ịhọrọ ụdị oghere laser site na ịtụgharị aka na ịgbanwee na ịgbanwee grating diffraction. Na 2011, Zhu et al. jiri nzacha a na-agbanwe agbanwe iji nweta mmepụta laser a na-agbanwe agbanwe otu-wavelength na obosara ahịrị dị warara. Na 2016, etinyere usoro mkpakọ linewidth Rayleigh na mkpakọ linewidth dual-wavelength, ya bụ, etinyere nrụgide na FBG iji nweta nhazi laser dual-wavelength, a na-enyocha linewidth laser mmepụta n'otu oge ahụ, na-enweta oke nhazi longwidth nke 3 nm. Mmepụta longwidth dual-wavelength nwere obosara ahịrị nke ihe dị ka 700 Hz. Na 2017, Zhu et al. Ejiri graphene na micro-nano eriri Bragg grating mee ihe nzacha a na-agbanwe agbanwe nke ọma, ma jikọta ya na teknụzụ Brillouin laser na-ebelata, jiri mmetụta photothermal nke graphene dị nso na 1550 nm iji nweta obosara laser dị ala dị ka 750 Hz na nyocha ngwa ngwa na nke ziri ezi nke 700 MHz/ms na oke ebili mmiri nke 3.67 nm. Dịka egosiri na Foto 5. Usoro njikwa ebili mmiri dị n'elu na-eme ka nhọrọ ụdị laser ahụ pụta ìhè site na ịgbanwe ebili mmiri etiti passband nke ngwaọrụ ahụ na oghere laser ozugbo ma ọ bụ na-apụtaghị ìhè.

Fig. 5 (a) Nhazi nnwale nke ogologo ebili mmiri anya-eriri laser a na-agbanwe agbanwena usoro nha;

(b) Ngosipụta nke spectra na mmepụta nke abụọ site na mmụba nke ọkpọkọ njikwa

2.3 Isi iyi ọkụ laser ọcha

Mmepe nke isi iyi ọkụ ọcha ahụla ọtụtụ ọkwa dịka oriọna tungsten halogen, oriọna deuterium,laser semiconductorna isi iyi ọkụ supercontinuum. Karịsịa, isi iyi ọkụ supercontinuum, n'okpuru mkpali nke femtosecond ma ọ bụ picosecond pulses nwere ike dị elu, na-emepụta mmetụta na-abụghị ahịrị nke usoro dị iche iche na waveguide, a na-agbasakwa spectrum nke ukwuu, nke nwere ike ikpuchi band ahụ site na ìhè a na-ahụ anya ruo nso infrared, ma nwee njikọ siri ike. Na mgbakwunye, site na ịgbanwe mgbasa na enweghị ahịrị nke eriri pụrụ iche, enwere ike ịgbatị spectrum ya ruo na etiti infrared band. A na-etinye ụdị isi iyi laser a nke ukwuu n'ọtụtụ ubi, dị ka onyonyo coherence optical, nchọpụta gas, onyonyo bayọlọji na ndị ọzọ. N'ihi mmachi nke isi iyi ọkụ na etiti na-abụghị ahịrị, a na-emepụta spectrum supercontinuum mbụ site na iko optical laser siri ike iji mepụta spectrum supercontinuum na oke a na-ahụ anya. Kemgbe ahụ, eriri optical aghọọla ihe dị mma maka ịmepụta supercontinuum sara mbara n'ihi nnukwu coefficient na-abụghị ahịrị na obere ubi ụdị nnyefe. Mmetụta ndị bụ isi na-abụghị nke ahịrị gụnyere ngwakọta ebili mmiri anọ, enweghị ike ịgbanwe agbanwe, mgbanwe onwe onye, ​​mgbanwe cross-phase, nkewa soliton, mgbasa Raman, mgbanwe onwe onye soliton, wdg, oke nke mmetụta ọ bụla dịkwa iche dabere na obosara pulse nke mkpali mkpali na mgbasa nke eriri ahụ. N'ozuzu, ugbu a isi iyi ọkụ supercontinuum bụ isi ihe na-eme ka ike laser dịkwuo mma na ịgbasa oke spectral, ma lezie anya na njikwa njikọ ya.

Nchịkọta 3

Akwụkwọ a na-achịkọta ma na-enyocha isi mmalite laser ejiri kwado teknụzụ sensọ eriri, gụnyere laser dị warara, laser a na-agbanwe ugboro ugboro na laser ọcha broadband. A na-ewebata ihe achọrọ maka ngwa na ọnọdụ mmepe nke laser ndị a n'ọhịa nke mmetụta eriri n'ụzọ zuru ezu. Site n'inyocha ihe ha chọrọ na ọnọdụ mmepe ha, a na-ekwubi na isi iyi laser kacha mma maka mmetụta eriri nwere ike nweta mmepụta laser dị warara na nke kwụsiri ike n'oge ọ bụla na oge ọ bụla. Ya mere, anyị na-amalite site na laser dị warara, laser dị warara obosara ahịrị nwere ike ịgbanwe na laser ọkụ ọcha nwere bandwidth gain sara mbara, ma chọpụta ụzọ dị irè iji nweta isi iyi laser zuru oke maka mmetụta eriri site na inyocha mmepe ha.