Moralo oa tsela ea optical ea laser polarized fiber narrow-linewidth laser

Moralo oa tsela ea optical ea fiber polarizedlaser e nang le bophara bo fokolang

1. Kakaretso

1018 nm polarized faeba e moqotetsane-mola oa laser. Leqhubu le sebetsang ke 1018 nm, matla a tlhahiso ea laser ke 104 W, bophara ba spectral ba 3 dB le 20 dB ke ~ 21 GHz le ~ 72 GHz ka ho latellana, karolelano ea ho timela ha polarization ke> 17.5 dB, 'me boleng ba sefate bo phahame (2 x M - 2 1.6 M) le A.tsamaiso ea laserka katleho ea moepa oa 79% (~1.63).

2. Tlhaloso ea tsela ea Optical

Ho alaser polarized fiber narrow-linewidth laser, linearly polarized fiber laser oscillator e entsoe ka para ea polarization-maintaining fiber gratings le 1.5-meter-long 10/125 μm ytterbium-doped double-clad polarization-maintaining fiber e le mokhoa oa ho rua. Coefficient ea ho monya ea fiber ena ea optical ho 976 nm ke 5 dB/m. Laser oscillator e pompeloa ke 976 nm wavelength-lockedlaser ea semiconductorka matla a mangata a 27 W ka ho boloka polarity (1 + 1) × 1 sekontiri sa mahlaseli. Grating e phahameng e bonts'ang e na le ponahalo e fetang 99%, 'me 3 dB reflection bandwidth e batla e le 0.22 nm. Ponahalo e tlase ea grating ke 40%, 'me 3 dB reflection bandwidth e ka bang 0.216 nm. Maqhubu a bohareng ba li-wavelengths tsa li-grating ka bobeli li ho 1018 nm. Ho leka-lekanya matla a tlhahiso ea laser resonator le tekanyo ea khatello ea ASE, ponahalo e tlaase ea grating e ile ea ntlafatsoa ho 40%. Tlhale ya mohatla ya grating e phahameng e bontshitsweng e kopantswe ho faeba ya phaello, ha tlhale ya mohatla wa grating e bonahatsang tlase e potoloha ka 90° mme e kopantswe le tlhale ya mohatla ya sefene sa cladding. Ka hona, boemo ba tlhōrō ea maqhubu a potlakisang a axis reflection of the high-reflection wavelength bo lumellana le ba butle-butle ba leqhubu la maqhubu a khantšitsoeng a leqhubu le bontšang tlaase. Ka tsela ena, laser e le 'ngoe feela e nang le polarized e ka phunyeletsang ka har'a mokokotlo oa resonant. Leseli le setseng la pompo ka har'a optical fiber cladding le tlhotliloeng ka mochini o iketselitseng oa cladding o kopantsoeng ka har'a sekoti sa resonant, 'me pigtail e hlahisoang e khabisitsoe ke 8 ° ho thibela maikutlo a sefahleho sa pheletso le ho oscillation ea parasitic.

3. Tsebo ea semelo

Mochine oa ho hlahisa li-laser tsa fiber lasers: Ka lebaka la khatello ea maikutlo, fiber e bolokang polarization e nang le sebopeho sa pere e na le lilepe tse peli tsa orthogonal polarization, tse tsejoang e le axis e potlakileng le axis e liehang. Ka kakaretso, kaha index ea refractive ea axis butle e kholo ho feta ea axis e potlakileng, grating e ngotsoeng holim'a fiber e bolokang polarization e na le maqhubu a mabeli a bohareng a fapaneng. Sebaka sa resonant sa laser e nang le polarized fiber hangata e entsoe ka li-grating tse peli tse bolokang polarization. Bophahamo ba maqhubu a sekhahla se tlase se bonts'ang le sekhahla se phahameng se bonts'ang holim'a axis e potlakileng le axis e liehang e lumellana ka ho latellana. Ha bandwidth e bonts'ang ea grating e bolokang polarization e le moqotetsane ka ho lekaneng, pono ea phetisetso ka har'a axis e potlakileng le litselana tse tsamaeang butle li ka aroloa, 'me maqhubu ka bobeli a ka sisinyeha ka har'a sekoti sa resonant. Ho ea ka molao-motheo oa oscillation oa maqhubu a mabeli a polarization-maintaining grating, tekong, mokhoa o ts'oanang oa ho cheselletsa o ka amoheloa ho o finyella. Nakong ea welding, li-axes tse bolokang polarization tsa li-grating tse peli li lumellana. Ka tsela ena, litlhōrō tse peli tsa phetisetso ea grating e phahameng e bonahatsang li lumellana le tsa grating e tlaase-reflection, 'me kahoo tlhahiso ea laser e habeli-wavelength e ka phethahala.

Litsamaisong tsa 'nete tsa ho boloka laser polarization, linear skew ke sesupo sa bohlokoa sa ho lekola litšobotsi tsa li-laser tsa polarized lasers. Ka kakaretso, nako ea grating e phahameng-reflectance e kholo ho feta ea grating e tlaase-reflectance. Ho fihlella laser polarized polarized e nang le boleng bo holimo ba PER, ke tlhoro e le 'ngoe feela ea polarization e hlokang ho thothomela. Ha karolo e potlakileng ea grating e bonts'ang tlase e haufi le axis e liehang ea grating e phahameng e bonahatsang, Bohareng ba maqhubu ka lehlakoreng la axis e bonts'ang tlase bo lumellana le tsela e eang butle ea grating e bonts'ang holimo, ha tlhōrō ea phetisetso e lebileng butle ha e tsamaellane le ntlha e tlase ea phallo e potlakileng. sebono se phahameng se bonahatsang. Ka tsela ena, tlhoro e le 'ngoe ea phetisetso e ka sisinyeha. Ka mokhoa o ts'oanang, ha karolo e liehang ea grating e tlaase e le haufi le sebaka se potlakileng sa grating e phahameng-reflectance, bolelele bo bohareng ba axis e liehang ea grating e tlaase e lumellana le ea sekhahla se potlakileng sa grating e phahameng, ha tlhōrō ea phetisetso ea sekhahla se potlakileng ha se tsamaisane le sekhahla se tlaase. seboholi se phahameng se bonahatsang. Ka tsela ena, tlhoro e le 'ngoe ea phetisetso le eona e ka sisinyeha. Mekhoa ena e 'meli e kaholimo e ka fihlela tlhahiso ea laser ea polarized linearly. Ho ea ka leqhubu le le leng la leqhubu le le leng la polarized laser oscillation molao-motheo oa polarization-maintaining grating, tekong, ho ka amoheloa mokhoa oa orthogonal splicing ho o fihlela. Ha splicing Angle ea lilepe tse bolokang polarization tsa grating e phahameng e bonahatsang le grating e tlaase e bonahatsang e le 90 °, tlhōrō ea phetisetso ka tsela e liehang ea axis ea grating e phahameng e bonahatsang e lumellana le tlhōrō ea phetisetso ka tsela e potlakileng ea mokhoa oa grating e tlaase, 'me kahoo tlhahiso ea fiber e nang le maqhubu a le mong e ka hlokomeloa.