Dhizaini yenzira ye optical ye polarized fiberlaser yakamanikana ine upamhi hwemutsara
1. Pfupiso
Laser ine upamhi hwe 1018 nm polarized fiber narrow-linewidth. Hurefu hwemafungu hunoshanda i1018 nm, simba re laser rinobuda i104 W, upamhi hwe spectral hwe 3 dB ne 20 dB huri ~21 GHz uye ~72 GHz zvichiteerana, polarization extinction ratio i >17.5 dB, uye mhando ye beam yakakwira (2 x M - 1.62 ne 2 y M) Asisitimu yelaserine kushanda zvakanaka kwemugero we79% (∼1.63).
2. Tsananguro yenzira yemaziso
Munelaser yakatetepa ine upamhi hwemutsara wakamanikana, oscillator yelaser yakasanganiswa nemutsara yakagadzirwa nepair ye fiber gratings inochengetedza polarization uye fiber ine urefu hwe 1.5-meter 10/125 μm ytterbium-doped double-clad polarization inochengetedza polarization se gain medium. Iyo absorption coefficient yeiyi optical fiber pa 976 nm i5 dB/m. Iyo laser oscillator inopombwa ne 976 nm wavelength-locked.laser ye semiconductorine simba guru re 27 W kuburikidza nemuchina wekubatanidza polarity-maintaining (1+1)×1 beam. Grating yepamusoro ine reflectivity inodarika 99%, uye bandwidth ye3 dB reflection inenge 0.22 nm. Reflectivity yakaderera yegrating i40%, uye bandwidth ye3 dB reflection inenge 0.216 nm. Mawavelength epakati ereflection emagrating ese ari maviri ari pa 1018 nm. Kuti simba rekubuda re laser resonator rienzane uye ASE suppression ratio rienzane, reflectivity yakaderera yegrating yakagadziriswa kusvika 40%. Fiber yemuswe yegrating yepamusoro inosanganiswa ne gain fiber, nepo tail fiber yegrating yakaderera inotenderedzwa 90° uye inosanganiswa ne tail fiber ye cladding filter. Saka, nzvimbo yepamusoro ye fast-axis reflection wavelength yegrating yepamusoro inofananidzwa neya slow-axis reflection wavelength yegrating yakaderera. Nenzira iyi, laser imwe chete ine polarized inogona kutenderera mu resonant cavity. Mwenje wepombi wasara mu optical fiber cladding unoseferwa ne cladding filter yakagadzirwa nega yega yakabatanidzwa mu resonant cavity, uye pigtail inobuda inotenderedzwa ne 8° kudzivirira mhinduro ye end face uye parasitic oscillation.
3. Ruzivo rwemashure
Maitiro ekugadzira ma laser e fiber ane polarized linearly: Nekuda kwe stress birefringence, fiber ine polarization-maintaining ine ma orthogonal polarization axes maviri, anozivikanwa se fast axis ne slow axis. Kazhinji, sezvo refractive index ye slow axis yakakura kupfuura ye fast axis, grating yakanyorwa pa polarization-maintaining fiber ine ma wavelengths maviri akasiyana. Resonant cavity ye linearly polarized fiber laser inowanzo kuve nema gratings maviri ane polarization. Ma wavelengths e low-reflection grating ne high-reflection grating pa fast axis ne slow axis zvinoenderana. Kana bandwidth ye reflection ye polarization-maintaining grating yakamanikana zvakakwana, transmission spectra mu fast axis ne slow axis directions inogona kuparadzaniswa, uye ma wavelengths ese anogona kudedera mukati me resonant cavity. Zvichienderana ne dual-wavelength oscillation principle ye polarization-maintaining grating, mukuyedza, nzira ye parallel welding inogona kushandiswa kuti izvi zviitike. Panguva yekusveta, ma axes anochengetedza polarization ema gratings maviri anorongeka. Nenzira iyi, mativi maviri e transmission e high-reflection grating anoenderana nee low-reflection grating, saka dual-wavelength laser output inogona kuwanikwa.
Mumasystem chaiwo ekuchengetedza polarization yelaser, linear skew chiratidzo chakakosha chekuongorora hunhu hwema lasers ane polarized linearly. Kazhinji, nguva ye grating ye high-reflection yakakura kupfuura ye low-reflection grating. Kuti uwane linearly polarized laser ine PER value yakakwira, polarization peak imwe chete ndiyo inofanira kudedera. Kana fast axis ye low-reflection grating iri pamwe chete ne slow axis ye high-reflection grating, central wavelength iri munzira ye fast axis ye low-reflection grating inoenderana neiri munzira ye slow axis ye high-reflection grating, nepo transmission peak iri munzira ye slow axis ye low-reflection grating isingaenderane ne transmission peak iri munzira ye fast axis ye high-reflection grating. Nenzira iyi, transmission peak imwe chete inogona kudedera. Saizvozvowo, kana slow axis ye low-reflection grating iri padivi pe fast axis ye high-reflection grating, central wavelength ye slow axis ye low-reflection grating inoenderana ne fast axis ye high-reflection grating, nepo transmission peak ye fast axis ye low-reflection grating isingaenderane ne slow axis ye high-reflection grating. Nenzira iyi, transmission peak imwe inogonawo kuzunguzwa. Nzira mbiri dziri pamusoro dzinogona kuwana linearly polarized laser output. Zvichienderana ne single-wavelength linearly polarized laser oscillation principle ye polarization-maintaining grating, mukuyedza, orthogonal splicing method inogona kushandiswa kuti izviitike. Kana Angle yekusunganidza ye polarization-maintaining axes ye high reflection grating uye low reflection grating iri 90°, peak yekutapurirana iri munzira inononoka ye high reflection grating inoenderana ne peak yekutapurirana iri munzira inokurumidza ye low reflection grating, uye nokudaro kubuda kwe single-wavelength linearly polarized fiber laser kunogona kuwanikwa.
Nguva yekutumira: Gunyana-12-2025