Uyilo lwendlela ebonakalayo yefayibha etyhidiweyoi-laser enobubanzi obumxinwa
1. Isishwankathelo
I-laser enobubanzi obuncinci obuyi-1018 nm yefayibha epholisiweyo. Ububanzi obusebenzayo yi-1018 nm, amandla okukhupha i-laser yi-104 W, ububanzi be-spectral be-3 dB kunye ne-20 dB buyi-~21 GHz kunye ne-~72 GHz ngokulandelanayo, umlinganiselo wokuphela kwe-polarization yi->17.5 dB, kwaye umgangatho we-beam uphezulu (2 x M - 1.62 kunye ne-2 y M) Ainkqubo yelaserkunye nokusebenza kakuhle kwethambeka kwe-79% (∼1.63).
2. Inkcazo yendlela ebonakalayo
Kwii-laser enobubanzi obuncinci befayibha etyhidiweyo, i-oscillator ye-laser yefayibha e-polarized linearly yenziwe ngee-gratings ze-fiber ezigcina i-polarization kunye ne-fiber egcina i-polarization ye-10/125 μm ene-ytterbium ephindwe kabini enobude obuyi-1.5 yeemitha njenge-gain medium. I-coefficient yokufunxa yale fayibha ye-optical kwi-976 nm yi-5 dB/m. I-oscillator ye-laser ipompelwa yi-976 nm wavelength-locked.i-laser ye-semiconductorngamandla aphezulu angama-27 W ngokusebenzisa isixhobo sokudibanisa i-polarity-maintaining (1+1)×1 beam. I-high reflection grating inokukhanya okungaphezulu kwama-99%, kwaye i-3 dB reflection bandwidth imalunga ne-0.22 nm. Ukukhanya okuphantsi kwe-grating yi-40%, kwaye i-3 dB reflection bandwidth imalunga ne-0.216 nm. Amaza okukhanya aphakathi kuzo zombini ii-gratings akwi-1018 nm. Ukulinganisela amandla okukhupha e-laser resonator kunye nomlinganiselo wokunciphisa we-ASE, ukukhanya okuphantsi kwe-grating kulungiselelwe ukuya kuma-40%. I-tail fiber ye-high-reflection grating idityaniswe ne-gain fiber, ngelixa i-tail fiber ye-low-reflection grating ijikeleziswa ngama-90° kwaye idityaniswe ne-tail fiber ye-cladding filter. Ngoko ke, indawo ephezulu ye-fast-axis reflection wavelength ye-high-reflection grating ifana ne-slow-axis reflection wavelength ye-low-reflection grating. Ngale ndlela, i-laser enye e-polarized kuphela enokujikeleza kwi-resonant cavity. Isibane sepompo esiseleyo kwi-optical fiber cladding sihluzwa yi-cladding filter eyenziwe ngokwakho edityaniswe kwi-resonant cavity, kwaye i-output pigtail ijikeleziswa nge-8° ukuthintela impendulo yobuso bokuphela kunye ne-parasitic oscillation.
3. Ulwazi oluvela kwimvelaphi
Indlela yokuvelisa iilaser zefayibha ezi-polarized linearly: Ngenxa ye-stress birefringence, ifayibha egcina i-polarization efana nepear inee-orthogonal polarization axes ezimbini, ezaziwa ngokuba yi-fast axis kunye ne-slow axis. Ngokubanzi, ekubeni i-refractive index ye-slow axis inkulu kuneye-fast axis, i-grating ebhalwe kwi-polarization-maintaining fiber inee-wavelengths ezimbini ezahlukeneyo eziphakathi. I-resonant cavity ye-linearly polarized fiber laser idla ngokwenziwa zii-gratings ezimbini ezigcina i-polarization. Ii-wavelengths ze-low-reflection grating kunye ne-high-reflection grating kwi-fast axis kunye ne-slow axis zihambelana ngokulandelelana. Xa i-bandwidth ye-reflection ye-polarization-maintaining grating incinci ngokwaneleyo, i-transmission spectra kwi-fast axis kunye ne-slow axis directions zinokwahlulwa, kwaye zombini ii-wavelengths zinokungcangcazela ngaphakathi kwi-resonant cavity. Ngokwemigaqo ye-dual-wavelength oscillation ye-polarization-maintaining grating, kuvavanyo, indlela ye-parallel welding inokusetyenziswa ukuze ifezekiswe. Ngexesha lokuwelda, ii-axes ezigcina i-polarization ze-gratings ezimbini ziyahambelana. Ngale ndlela, iincochoyi ezimbini zokudlulisela ze-grating ephezulu zihambelana nezo ze-grating ephantsi, kwaye ngaloo ndlela imveliso ye-laser enobude obuphindwe kabini inokuphunyezwa.
Kwiinkqubo zokwenyani zokugcina i-laser polarization, i-linear skew sisalathisi esibalulekileyo sokuvavanya iimpawu zemveliso ye-laser e-linearly polarized. Ngokubanzi, ixesha le-high-reflection grating likhulu kunelo le-low-reflection grating. Ukuze kufezekiswe i-linearly polarized laser enexabiso eliphezulu le-PER, kufuneka kudlidlize i-polarization peak enye kuphela. Xa i-fast axis ye-low-reflection grating ikwi-slow axis ye-high-reflection grating, ubude be-central axis kwicala le-low-reflection grating buhambelana naleyo ikwi-slow axis kwicala le-high-reflection grating, ngelixa i-transmission peak kwicala le-slow axis ye-low-reflection grating ingahambelani ne-transmission peak kwicala le-fast axis ye-high-reflection grating. Ngale ndlela, i-transmission peak enye inokudlidliza. Ngokufanayo, xa i-axis ecothayo ye-grating ekhanyayo ephantsi ikwi-axis ekhawulezayo ye-grating ekhanyayo ephezulu, ubude be-wavelength ephakathi ye-axis ecothayo ye-grating ekhanyayo ephantsi ihambelana ne-axis ekhawulezayo ye-grating ekhanyayo ephezulu, ngelixa i-transmission peak ye-axis ekhawulezayo ye-grating ekhanyayo ephantsi ingahambelani ne-axis ecothayo ye-grating ekhanyayo ephezulu. Ngale ndlela, i-transmission peak enye nayo ingashukunyiswa. Zombini ezi ndlela zimbini zingafikelela kwi-linearly polarized laser output. Ngokwe-single-wavelength linearly polarized laser oscillation principle ye-polarization-maintaining grating, kuvavanyo, indlela ye-orthogonal splicing inokusetyenziswa ukuze ifezekiswe. Xa i-Angle ye-splicing ye-axes ezigcina i-polarization ye-high reflection grating kunye ne-low reflection grating ingama-90°, i-transmission peak kwicala le-slow axis ye-high reflection grating ihambelana ne-transmission peak kwicala le-fast axis ye-low reflection grating, kwaye ngaloo ndlela imveliso ye-single-wavelength linearly polarized fiber laser inokufezekiswa.
Ixesha leposi: Sep-12-2025