Teknụzụ isi iyi Laser maka nghọta eriri anya akụkụ nke abụọ

Teknụzụ isi iyi Laser maka nghọta eriri anya akụkụ nke abụọ

2.2 Mkpochapụ otu wavele ogologoisi iyi laser

Nghọta nke ịsachapụ otu wavelength laser bụ n'ezie ijikwa njirimara anụ ahụ nke ngwaọrụ dị nalaseroghere (na-emekarị n'etiti wavelength nke na-arụ ọrụ bandwit), nke mere na iji nweta akara na nhọrọ nke oscillating longitudinal mode na oghere, nke mere iji nweta nzube nke n'iji ya gee ntị mmepụta wavelength. Dabere n'ụkpụrụ a, dịka n'afọ ndị 1980, a na-enweta mmezu nke lasers fiber tunable site na dochie ihu njedebe na-egosipụta laser na grating diffraction na-egosipụta, na ịhọrọ ọnọdụ oghere laser site na iji aka na-atụgharị ma na-emegharị grating diffraction. Na 2011, Zhu et al. A na-eji ihe nzacha a na-emegharị emegharị eme ihe iji nweta mmepụta laser nwere ogologo ogologo ogologo yana eriri eriri dị warara. Na 2016, Rayleigh linewidth mkpakọ usoro etinyere na dual-wavelength mkpakọ, ya bụ, nrụgide na-etinyere na FBG iji nweta dual-wavelength laser n'iji ya gee ntị, na mmepụta laser linewidth na-enyocha n'otu oge ahụ, na-enweta a wavelength n'iji ya gee ntị nso nke 3. nm. Mmepụta kwụsiri ike nke ogologo wavelong nwere ogologo ahịrị dị ihe dịka 700 Hz. Na 2017, Zhu et al. ejiri graphene na micro-nano fiber Bragg grating mee ihe nzacha ngwa anya niile, yana jikọtara ya na teknụzụ Brillouin laser warara teknụzụ, jiri mmetụta photothermal nke graphene dị nso 1550 nm iji nweta eriri laser dị ala dị ka 750 Hz na njikwa foto ngwa ngwa. nyocha ziri ezi nke 700 MHz/ms n'ogo ogologo nke 3.67 nm. Dị ka e gosiri na Figure 5. The n'elu wavelength akara usoro ihu ọma na-aghọta laser mode nhọrọ site ozugbo ma ọ bụ na-apụtaghị ìhè ịgbanwe passband center wavelength nke ngwaọrụ na laser oghere.

Fig. 5 (a) Ntọlite ​​nnwale nke ogologo wavele ogologo anya-achịkwa-eriri laser tunablena usoro nha;

(b) Ihe ngosi mmepụta ihe na mmepụta 2 na nkwalite nke mgbapụta njikwa

2.3 Isi iyi ọkụ laser ọcha

Mmepe nke ọkụ na-acha ọcha enwetala ọkwa dị iche iche dị ka oriọna halogen tungsten, oriọna deuterium,semiconductor laserna isi iyi ọkụ supercontinuum. Karịsịa, isi iyi ọkụ nke supercontinuum, n'okpuru mkpali nke femtosecond ma ọ bụ picosecond pulses nwere ike na-adịru nwa oge, na-emepụta mmetụta na-adịghị adị nke iwu dị iche iche na waveguide, na ụdịdị dị iche iche na-agbasawanye nke ukwuu, nke nwere ike kpuchie eriri ahụ site na ìhè a na-ahụ anya gaa na nso infrared. ma nwee njikọ siri ike. Tụkwasị na nke ahụ, site n'ịgbanwe mgbasa na enweghị ntanetị nke eriri pụrụ iche, ụdịdị ya nwere ike gbasaa ọbụna ruo n'etiti etiti infrared. A na-etinye ụdị isi iyi laser nke ukwuu n'ọtụtụ ebe, dị ka ihe nleba anya anya, nchọpụta gas, ihe onyonyo ndụ na ihe ndị ọzọ. N'ihi mmachi nke isi iyi ọkụ na ihe na-adịghị n'ịntanetị, ihe mbụ supercontinuum spectrum bụ nke siri ike na-emepụta enyo anya laser steeti siri ike iji mepụta ụdịdị supercontinuum n'ogo a na-ahụ anya. Kemgbe ahụ, eriri anya ejirila nke nta nke nta bụrụ ụzọ kachasị mma maka ịmepụta wideband supercontinuum n'ihi nnukwu ọnụọgụ na-adịghị adị na obere mpaghara nnyefe. Isi ihe na-adịghị ahụkebe na-agụnye ngwakọta anọ na-efegharị efegharị, mgbanwe mgbanwe mgbanwe, mgbanwe onwe onye, ​​​​mgbanwe nke usoro ihe omume, nkewa nke soliton, mgbasa ozi Raman, mgbanwe ngbanwe nke onwe onye soliton, wdg, na nha nke mmetụta ọ bụla dịkwa iche dị ka obosara usu nke excitation usu na mgbasa nke eriri. N'ozuzu, ugbu a supercontinuum ìhè isi bụ tumadi kwupụta imeziwanye ike laser na ịgbasa spectral nso, na ntị na ya ịdị n'otu akara.

3 Nchịkọta

Akwụkwọ a na-achịkọta ma na-enyocha isi mmalite laser ejiri na-akwado teknụzụ nhụta fiber, gụnyere laser linewidth dị warara, laser nke nwere ike ịgbatị otu ugboro na laser ọcha brọdband. Ngwa chọrọ na ọnọdụ mmepe nke lasers ndị a n'ọhịa nke ụbụrụ fiber na-ewebata n'ụzọ zuru ezu. Site n'ịtụle ihe ha chọrọ na ọnọdụ mmepe ha, a na-ekwubi na ezigbo laser isi iyi maka ụbụrụ fiber nwere ike nweta mmepụta laser dị warara na nke siri ike n'oge ọ bụla. Ya mere, anyị na-amalite na warara ahịrị obosara Laser, Tunable warara ahịrị obosara Laser na-acha ọcha ìhè laser na mbara uru bandwit, na-achọpụta ụzọ dị irè na-aghọta ezigbo Laser isi iyi maka eriri na-aghọta site na-enyocha ha mmepe.