Idizayini yendlela ye-Optical ye-fiber polarizedi-laser enobubanzi obuncane
1. Uhlolojikelele
I-laser engu-1018 nm i-polarized fibre emincane yobubanzi bomugqa. I-wavelength esebenzayo ingu-1018 nm, amandla okukhipha i-laser ngu-104 W, ububanzi be-spectral obungu-3 dB no-20 dB ngu-~21 GHz no-~72 GHz ngokulandelanayo, isilinganiso sokuqedwa kwe-polarization ngu>17.5 dB, futhi ikhwalithi ye-beam iphezulu (2 x M – 2 y62 kanye A)uhlelo lwe-laserngokusebenza kahle komthambeka okungama-79% (~1.63).
2. Incazelo yendlela yokubona
Phakathi kui-polarized fibre emincane-linewidth laser, i-linearly polarized fibre laser oscillator yenziwe ngepheya ye-polarization-maintaining fibre gratings kanye ne-1.5-metres-long 10/125 μm ytterbium-doped double-clad polarization-maintaining fiber njengendlela yokuzuza. I-coefficient yokumuncwa yale fibre optical ku-976 nm ingu-5 dB/m. I-laser oscillator iphanjwa i-976 nm wavelength-lockedI-semiconductor laserngamandla amakhulu angu-27 W ngokusebenzisa i-polarity-maintaining (1+1)×1 isihlanganisi se-beam. I-grating ebonisayo ephezulu inokubonisa okungaphezulu kuka-99%, futhi umkhawulokudonsa wokubonisa ongu-3 dB cishe u-0.22 nm. Ukubonakala okuphansi kwe-grating kungu-40%, futhi i-3 dB reflection bandwidth cishe i-0.216 nm. Amaza okukhanya okumaphakathi kwawo womabili ama-grating aku-1018 nm. Ukuze ulinganise amandla okukhiphayo we-laser resonator kanye nesilinganiso sokucindezela se-ASE, ukubukeka okuphansi kwegridi kuthuthukiswe kwaba ngu-40%. I-fiber yomsila we-grating ene-reflection ephezulu ihlanganiswe ku-fiber etholakalayo, kuyilapho i-fiber yomsila we-grating enereflection ephansi izungezwa ngo-90° futhi ihlanganiswe ne-fibre yomsila yesihlungi sokuvala. Ngakho-ke, ukuma okuphezulu kwe-axis reflection wavelength esheshayo ye-grating yokukhanya okuphezulu ifana ne-slow-axis reflection wavelength ye-grating ene-reflection ephansi. Ngale ndlela, i-laser eyodwa kuphela e-polarized engazulazula emgodini we-resonant. Ukukhanya kwephampu okusele ku-optical fibre cladding kuhlunga ngesihlungi sokuzenzela esenziwe mathupha esihlanganiswe ku-resonant cavity, futhi i-pigtail ephumayo igobeze ngo-8° ukuvimbela impendulo yobuso bokuphela kanye nokuzulazula kwe-parasitic.
3. Ulwazi lwesizinda
Indlela yokukhiqiza yama-laser e-fiber e-polarized: Ngenxa ye-stress birefringence, i-fiber emise okwepheya egcina i-polarization inama-eksisi amabili e-orthogonal polarization, aziwa ngokuthi i-eksisi esheshayo ne-eksisi ehamba kancane. Ngokuvamile, njengoba inkomba ye-refractive ye-eksisi ehamba kancane inkulu kunaleyo ye-eksisi esheshayo, i-grating ebhalwe ku-polarization-maitaining fiber inamaza amaphakathi amabili ahlukene. I-resonant cavity ye-linearly polarized fibre laser ngokuvamile yakhiwa ama-grating amabili agcina i-polarization. Ubude begagasi begreyitha enereflection ephansi kanye negethi ebonisa ukukhanya okuphezulu ku-eksisi esheshayo kanye ne-eksisi ehamba kancane kuyahambelana ngokulandelana. Lapho umkhawulokudonsa obonisayo we-grating egcina i-polarization umncane ngokwanele, i-spectra yokudlulisela ku-eksisi esheshayo nezikhombisi-ndlela ze-eksisi ehamba kancane zingahlukaniswa, futhi womabili amaza amaza angadlidliza ngaphakathi kwe-resonant cavity. Ngokomgomo we-dual-wavelength oscillation we-polarization-maintaining grating, ekuhlolweni, indlela yokushisela ehambisanayo ingamukelwa ukuze kuzuzwe. Ngesikhathi sokushisela, ama-axes okugcina i-polarization ama-gratings amabili ahambisana. Ngale ndlela, iziqongo zokudlulisela ezimbili ze-grating ene-reflection ephezulu zihambelana nalezo ze-grating enereflection ephansi, futhi ngaleyo ndlela ukuphuma kwe-laser enamaza amabili angabonakala.
Kumasistimu angempela okugcina i-laser polarization, i-linear skew iyinkomba ebalulekile yokuhlola izici zokukhishwa kwama-laser ahlukaniswe ngomugqa. Ngokuvamile, isikhathi se-grating ene-reflectance ephezulu sikhulu kuneso se-grating enokukhanya okuphansi. Ukuze kuzuzwe i-laser ehlukanisiwe enevelu engu-PER ephezulu, inani eliphakeme le-polarization elilodwa kuphela elidinga ukudlidliza. Uma i-eksisi esheshayo yegriyithi ebonisa ukukhanya okuphansi ihambisana ne-eksisi ehamba kancane ye-grating ebonisa ukukhanya okuphezulu, Ubude begagasi obumaphakathi ohlangothini lwe-eksisi esheshayo ye-grating ebonisa ukukhanya okuphansi buhambisana naleyo ehlangothini ye-eksisi ehamba kancane ye-grating ene-reflection ephezulu, kuyilapho isiqongo sokudlulisela kwi-eksisi ehamba kancane ayihambisani ne-axis esheshayo igridi enesithombe esiphezulu. Ngale ndlela, inani eliphakeme lokudlulisela lingadlidliza. Ngokufanayo, uma i-eksisi ehamba kancane ye-axis enereflence ephansi ihambisana ne-eksisi esheshayo ye-axis ebonisa ukukhanya okuphezulu, ubude begagasi obumaphakathi be-eksisi ekhanyayo ephansi buhambisana naleyo ye-eksisi esheshayo ye-grating ebonisa ukukhanya okuphezulu, kuyilapho i-axis yokudlulisela ye-axis esheshayo ayihambisani ne-axis esheshayo ye-grating ephansi. igridi ekhombisa ukukhanya okuphezulu. Ngale ndlela, inani eliphakeme lokudlulisela elilodwa lingadlidliza. Zombili lezi zindlela ezimbili ezingenhla zingafinyelela okukhiphayo kwelaser eyenziwe ngomugqa. Ngokomgomo we-laser oscillation one-wavelength eyodwa ye-polarization-maintaining grating, ekuhlolweni, indlela ye-orthogonal splicing ingamukelwa ukuze kuzuzwe. Uma i-engeli yokuhlanganisa yama-eksisi okugcina i-polarization we-grating ebonisa phezulu kanye ne-grating ebonisayo ephansi ingu-90°, ukuphakama kokudlulisela ku-axis ehamba kancane ye-grating ebonisayo ephezulu ihambisana nokuphakama kokudlulisela ku-eksisi esheshayo yokuqondisa okuphansi, futhi ngaleyo ndlela okukhiphayo kwe-laser ye-wavelength ye-laser ingabonwa ngomugqa womugqa we-wavelength.
Isikhathi sokuthumela: Sep-12-2025