Uyilo lwendlela ye-Optical yefiber polarizedlaser-linewidth emxinwa
1. Isishwankathelo
I-1018 nm ifayibha yepolarized laser emxinwa-ububanzi bomgca. I-wavelength esebenzayo yi-1018 nm, i-laser output power yi-104 W, ububanzi be-spectral be-3 dB kunye ne-20 dB yi- ~ 21 GHz kunye ne- ~ 72 GHz ngokulandelanayo, i-polarization extinction ratio yi> 17.5 dB, kwaye umgangatho we-beam uphezulu (2 x M - 2 y62) kunye ne-Ainkqubo laserkunye nokusebenza kakuhle kwe-slope ye-79% (~1.63).
2. Inkcazo yendlela yokubona
Kwiifayibha polarized laser emxinwa-linewidth, i-laser oscillator ye-polarized fibre eyenziwe nge-polarization-ukugcina i-fiber gratings kunye ne-1.5-meter-long 10/125 μm ytterbium-doped double-clad polarization-ukugcina i-fiber njengendlela yokuzuza. I-coefficient ye-absorption ye-fiber optical kwi-976 nm yi-5 dB / m. I-laser oscillator impontshwa yi-976 nm wavelength-itshixiwesemiconductor laserngamandla amakhulu angama-27 W ngokusebenzisa i-polarity-ukugcina (1 + 1) × i-1 umdibisi we-boam. Igrayiti ephezulu yokubonisa inokubonakala okungaphezulu kwe-99%, kwaye i-3 dB reflection bandwidth imalunga ne-0.22 nm. Ukubonakaliswa okuphantsi kwe-grating yi-40%, kwaye i-3 dB reflection bandwidth imalunga ne-0.216 nm. I-central reflection wavelengths of both gratings are at 1018 nm. Ukulinganisa amandla okuphuma kwe-laser resonator kunye ne-ASE yokunciphisa umlinganiselo, i-reflectivity ephantsi ye-grating yaphuculwa ukuya kwi-40%. I-fiber yomsila we-high-reflection grating idityaniswe kwi-fiber yokuzuza, ngelixa i-fiber yomsila we-grating ephantsi-reflection ijikeleza i-90 ° kwaye idibaniswe kwi-fiber yomsila we-cladding filter. Ke ngoko, indawo encochoyi yophawu olukhawulezayo lwe-axis ebonisa ubude be-axis ebonisa i-high-reflection grating ihambelana ne-axis-slow-axis reflection ye-wavelength ye-grating ephantsi. Ngale ndlela, inye kuphela i-laser yepolarized enokuthi ixube kwi-resonant cavity. Ukukhanya kwempompo okuseleyo kwi-fiber optical cladding kuhluzwa ngaphandle kwe-self-made cladding filter edityanisiweyo kwi-resonant cavity, kwaye i-pigtail ephumayo i-beveled yi-8 ° ukukhusela impendulo yobuso bokugqibela kunye ne-oscillation ye-parasitic.
3. Ulwazi lwemvelaphi
Indlela yokuvelisa i-laser ye-polarized fiber lasers: Ngenxa yoxinzelelo lwe-birefringence, i-fiber emilise i-polarization enobume bepere inee-axes ezimbini ze-orthogonal polarization, ezaziwa njenge-axis ekhawulezayo kunye ne-axis ecothayo. Ngokuqhelekileyo, ekubeni isalathiso se-refractive se-axis ecothayo sikhulu kune-axis ekhawulezayo, i-grating ebhaliweyo kwi-fiber polarization-maintaining fiber inamaza amabini ahlukeneyo aphakathi. I-resonant cavity ye-linearly polarized fiber laser idla ngokuqulunqwa ngeegrayiti ezimbini zepolarization-ukugcina. Ubude be-wavelengths ye-low-reflection grating kunye ne-high-reflection grating kwi-axis ekhawulezayo kunye ne-slow axis ihambelana ngokulandelanayo. Xa i-bandwidth ye-reflection ye-polarization-ukugcina i-grating incinci ngokwaneleyo, i-spectra yokudluliselwa kwi-axis ekhawulezayo kunye nezikhokelo ze-axis ezicothayo zinokwahlulwa, kwaye zombini i-wavelengths inokungcangcazela ngaphakathi kwe-resonant cavity. Ngokomgaqo we-oscillation we-wavelength ye-polarization-ukugcina i-grating, ekuvavanyeni, indlela ye-welding ehambelanayo inokumkelwa ukuyifezekisa. Ngexesha le-welding, i-axes yokugcina i-polarization ye-gratings ezimbini ihambelana. Ngale ndlela, iincopho ezimbini zokuhanjiswa kwegrayiti ephezulu ebonakalisa imbonakalo ephezulu ihambelana nezo zegrayiti ebonisa imbonakalo ephantsi, kwaye ngaloo ndlela imveliso ye-laser ene-wavelength emibini inokufezekiswa.
Kwiinkqubo zangempela zokugcina i-laser polarization, i-skew ye-linear sisalathisi esibalulekileyo sokuvavanya iimpawu zemveliso ye-laser polarized lasers. Ngokubanzi, ixesha legrayiti ebonakalisa ubushushu obuphezulu bukhulu kunelo legrayiti ebonisa ukuncipha. Ukufezekisa i-laser ye-polarized linearly enexabiso eliphezulu le-PER, enye kuphela incopho yepolarization kufuneka ingcangcazele. Xa i-axis ekhawulezayo yegrayiti ebonakalisayo ephantsi ikunye ne-axis ecothayo ye-high-reflectance grating, I-wavelength esembindini kwicala le-axis ekhawulezayo yegrayiti ebonisa i-low-reflection ihambelana naleyo ikwicala elicothayo le-axis ebonisa ukukhanya okuphezulu, ngelixa incopho yokuhanjiswa kwi-axis ecothayo ihambelana ne-axis esezantsi ehambelana ne-low-reflection. igrayiti enembonakalo ephezulu. Ngale ndlela, enye incopho yothumelo inokungcangcazela. Ngokufanayo, xa i-axis ecothayo ye-low-reflectance grating ihamba kunye ne-axis ekhawulezayo ye-high-reflectance grating, ubude obuphakathi be-axis ecothayo ye-axis ephantsi-reflectance ihambelana naleyo ye-axis ekhawulezayo ye-high-reflectance grating, ngelixa i-axis yokuhanjiswa kwe-axis ekhawulezayo ayihambelani ne-axis ephantsi. igrayiti enembonakalo ephezulu. Ngale ndlela, enye incopho yothumelo nayo inokungcangcazela. Zombini ezi ndlela zimbini zingasentla zinokufikelela kwi-linearly polarized laser output. Ngokwe-single-wavelength linearly polarized laser oscillation umgaqo we-polarization-ukugcina igrayiti, kuvavanyo, indlela ye-orthogonal splicing inokwamkelwa ukuyifezekisa. Xa i-Angle ye-splicing ye-axes yokugcina i-polarization ye-grating ephezulu ebonakalisayo kunye ne-grating esezantsi ebonisa i-90 °, incopho yokuhanjiswa kwinqanaba le-axis ecothayo yegrayiti ebonakalisayo ephezulu ihambelana nencopho yokuhanjiswa kwinqanaba le-axis ekhawulezayo yegrayiti ebonakalisayo ephantsi, kwaye ngaloo ndlela imveliso ye-laser ye-polarized fiber linear inokuqonda enye.
Ixesha lokuposa: Sep-12-2025