Umklamo wendlela ebonakalayo yefayibha ehlanganisiwei-laser enobubanzi obuncane
1. Ukubuka konke
I-laser enobubanzi obuncane obuyi-1018 nm ene-polarized fiber. Ubude obusebenzayo buyi-1018 nm, amandla okukhipha i-laser angama-104 W, ububanzi be-spectral obuyi-3 dB kanye ne-20 dB bungama-~21 GHz kanye nama-~72 GHz ngokulandelana, isilinganiso sokuphela kwe-polarisation singu->17.5 dB, kanti ikhwalithi ye-beam iphezulu (2 x M – 1.62 kanye nama-2 y M) Auhlelo lwe-laserngokusebenza kahle kokuthambeka okungu-79% (∼1.63).
2. Incazelo yendlela ebonakalayo
Phakathi kui-laser enobubanzi obuncane be-fiber ehlanganisiwe, i-oscillator ye-laser ye-fiber e-polarized linearly yakhiwe yi-pair of polarization-modering fiber gratings kanye ne-fiber e-double-clad polarization-modering enobude obuyi-1.5 metres engu-10/125 μm ytterbium-doped double-clad polarization-modering njenge-gain medium. I-coefficient yokumuncwa kwale fiber ye-optical ku-976 nm ingu-5 dB/m. I-oscillator ye-laser iphampulwa yi-976 nm wavelength-locked.i-laser ye-semiconductorngamandla aphezulu angu-27 W ngokusebenzisa i-polarity-maintaining combiner (1+1)×1 beam combiner. I-high reflection grating inokukhanya okungaphezu kuka-99%, kanti i-3 dB reflection bandwidth icishe ibe ngu-0.22 nm. Ukukhanya okuphansi kwe-grating kungu-40%, kanti i-3 dB reflection bandwidth icishe ibe ngu-0.216 nm. Ama-wavelength aphakathi okukhanya kwawo womabili ama-gratings aku-1018 nm. Ukuze kulinganiswe amandla okukhipha e-laser resonator kanye ne-ASE suppression ratio, ukukhanya okuphansi kwe-grating kulungiselelwe ku-40%. I-tail fiber ye-high-reflection grating ihlanganiswe ne-gain fiber, kuyilapho i-tail fiber ye-low-reflection grating ijikeleziswa ngo-90° futhi ihlanganiswe ne-tail fiber ye-cladding filter. Ngakho-ke, isikhundla esiphezulu se-fast-axis reflection wavelength ye-high-reflection grating ifana ne-slow-axis reflection wavelength ye-low-reflection grating. Ngale ndlela, i-laser eyodwa kuphela e-polarized enganyakazisa emgodini ophendulayo. Ukukhanya okusele kwephampu ku-optical fiber kufakwa kuhlungwa ngesihlungi sokuvala esenziwe ngokwakho esihlanganiswe emgodini ophendulayo, bese umsila we-pigtail ophumayo ubekwa ngo-8° ukuvimbela impendulo yobuso bokugcina kanye nokunyakaza kwe-parasitic.
3. Ulwazi lwangemuva
Indlela yokukhiqiza ama-laser e-fiber ahlukaniswe ngomugqa: Ngenxa ye-birefringence yokucindezeleka, i-fiber egcina i-polarization enobunjwa bepheya inezingqimba ezimbili ze-orthogonal polarization, ezaziwa ngokuthi i-fast axis kanye ne-slow axis. Ngokuvamile, njengoba i-refractive index ye-slow axis inkulu kuneye-fast axis, i-grating ebhalwe ku-polarization-maintaining fiber inama-wavelength amabili ahlukene aphakathi. I-resonant cavity ye-linearly polarized fiber laser ivame ukwakhiwa ama-grating amabili agcina i-polarization. Ama-wavelength e-grating ephansi yokubonakalisa kanye ne-high-reflection grating ku-fast axis kanye ne-slow axis ahambisana ngokulandelana. Lapho i-bandwidth yokubonakalisa ye-grating egcina i-polarization incane ngokwanele, i-transmission spectra ku-fast axis kanye neziqondiso ze-slow axis zingahlukaniswa, futhi womabili ama-wavelength angadlidliza ngaphakathi kwe-resonant cavity. Ngokusho komgomo we-dual-wavelength oscillation we-grating egcina i-polarization, ekuhlolweni, indlela ye-parallel welding ingasetshenziswa ukuze ifezeke. Ngesikhathi sokushisela, ama-axes okugcina i-polarization yama-grating amabili ayaqondaniswa. Ngale ndlela, iziqongo ezimbili zokudlulisela ze-grating yokubonisa okuphezulu zihambisana neze-grating yokubonisa okuphansi, ngakho-ke umphumela we-laser we-dual-wavelength ungabonakala.
Ezinhlelweni zangempela zokulondoloza i-laser polarization, i-linear skew iyinkomba ebalulekile yokuhlola izici zokukhipha zama-laser ahlukaniswe ngomugqa. Ngokuvamile, isikhathi se-high-reflection grating sikhulu kune-low-reflection grating. Ukuze kufezwe i-linearly polarized polarity enenani eliphezulu le-PER, kudingeka ukuthi kudlidlize i-pole eyodwa kuphela. Lapho i-fast axis ye-low-reflection grating iseceleni kwe-slow axis ye-high-reflection grating, ubude be-wavelength obuphakathi ohlangothini lwe-fast axis ye-low-reflection grating bufana nalolo oluseceleni kwe-slow axis ye-high-reflection grating, kuyilapho i-transmission peak ohlangothini lwe-slow axis ye-low-reflection grating ingahambisani ne-transmission peak ohlangothini lwe-fast axis ye-high-reflection grating. Ngale ndlela, i-transmission peak eyodwa ingadlidliza. Ngokufanayo, lapho i-axis ehamba kancane ye-grating ekhanyayo ephansi iseduze kwe-axis esheshayo ye-grating ekhanyayo ephezulu, ubude be-wavelength obuphakathi be-axis ekhanyayo ye-grating ekhanyayo ephansi bufana nobe-axis esheshayo ye-grating ekhanyayo ephezulu, kuyilapho i-transmission peak ye-axis esheshayo ye-grating ekhanyayo ephansi ingahambisani ne-axis ekhanyayo ye-grating ekhanyayo ephezulu. Ngale ndlela, i-transmission peak eyodwa nayo ingadlidlizwa. Zombili lezi zindlela ezimbili ezingenhla zingafeza umphumela we-laser oqondile. Ngokusho kwesimiso se-laser oscillation esiqondile se-single-wavelength ye-grating egcina i-polarization, ekuhlolweni, indlela ye-orthogonal splicing ingasetshenziswa ukuze ifezeke. Uma i-engela yokuxhumanisa yama-axes okugcina i-polarization ye-grating yokubonisa okuphezulu kanye ne-grating yokubonisa okuphansi ingu-90°, i-peak yokudlulisela ohlangothini lwe-axis ephansi ye-grating yokubonisa okuphezulu ihambelana ne-peak yokudlulisela ohlangothini lwe-axis eshesha ye-grating yokubonisa okuphansi, ngakho-ke umphumela we-laser ye-fiber ehlanganisiwe ene-wavelength eyodwa ungabonakala.
Isikhathi sokuthunyelwe: Septhemba 12-2025