Kapangidwe ka njira yowunikira ya ulusi wozunguliralaser yopapatiza yokhala ndi mzere wopapatiza
1. Chidule
Laser yopingasa ya 1018 nm yokhala ndi ulusi wopapatiza wa mzere wopapatiza. Kutalika kwa nthawi yogwira ntchito ndi 1018 nm, mphamvu yotulutsa laser ndi 104 W, m'lifupi mwa spectral wa 3 dB ndi 20 dB ndi ~21 GHz ndi ~72 GHz motsatana, chiŵerengero cha kutha kwa polarization ndi >17.5 dB, ndipo khalidwe la kuwala ndi lalikulu (2 x M - 1.62 ndi 2 y M) Adongosolo la laserndi mphamvu yotsetsereka ya 79% (∼1.63).
2. Kufotokozera njira yowunikira
Mulaser yopapatiza ya mzere wopingasa wa ulusi, choyezera cha laser cholumikizidwa ndi mzere chimapangidwa ndi ma grating awiri a ulusi wosunga polarization ndi ulusi wosunga polarization wa 10/125 μm wa 1.5-mita wautali ngati 10/125 μm ytterbium-doped double-clad polarization ngati gain medium. Choyezera kuyamwa kwa ulusi uwu pa 976 nm ndi 5 dB/m. Choyezera cha laser chimapopedwa ndi 976 nm wavelength-locked.laser ya semiconductorndi mphamvu yayikulu ya 27 W kudzera mu chophatikiza cha polarity-maintaining (1+1)×1 beam. Grating yowunikira kwambiri ili ndi reflectivity yoposa 99%, ndipo bandwidth yowunikira ya 3 dB ndi pafupifupi 0.22 nm. Reflectivity yotsika ya grating ndi 40%, ndipo bandwidth yowunikira ya 3 dB ndi pafupifupi 0.216 nm. Mafunde apakati a reflection a ma grating onsewa ali pa 1018 nm. Kuti agwirizane mphamvu yotulutsa ya laser resonator ndi ASE suppression ratio, reflectivity yotsika ya grating idakonzedwa kufika pa 40%. Ulusi wammbuyo wa grating yowunikira kwambiri umalumikizidwa ku gain fiber, pomwe ulusi wammbuyo wa grating yowunikira pang'ono umazunguliridwa 90° ndikugwirizanitsidwa ku ulusi wammbuyo wa cladding filter. Chifukwa chake, malo apamwamba a wavelength yowunikira mwachangu ya grating yowunikira kwambiri ikufanana ndi wavelength yowunikira pang'onopang'ono ya grating yowunikira pang'onopang'ono. Mwanjira imeneyi, laser imodzi yokha yomwe imazungulira imatha kugwedezeka mu resonant cavity. Kuwala kotsala kwa pampu mu optical fiber cladding kumasefedwa ndi fyuluta yopangira yokha yolumikizidwa mu resonant cavity, ndipo pigtail yotuluka imapindika ndi 8° kuti isagwedezeke ndi kugwedezeka kwa parasitic pankhope.
3. Chidziwitso cha mbiri yakale
Njira yopangira ma laser a ulusi wopingasa wolunjika: Chifukwa cha birefringence ya stress, ulusi wopingasa wooneka ngati peyala uli ndi ma axes awiri a orthogonal polarization, omwe amadziwika kuti fast axis ndi slow axis. Kawirikawiri, popeza refractive index ya slow axis ndi yayikulu kuposa ya fast axis, grating yolembedwa pa ulusi wopingasa wopingasa imakhala ndi ma wavelength awiri osiyana apakati. Mphepete mwa resonant ya laser ya linearly polarized fiber nthawi zambiri imakhala ndi ma grating awiri opingasa. Ma wavelength a grating yotsika ndi grating yokwera ndi slow axis zimagwirizana motsatana. Pamene bandwidth yowunikira ya grating yopingasa ndi yopapasa ndi yopapasa ndi yopapasa ndi yopapasa ndi yopapasa, ma spectra otumizira mu fast axis ndi slow axis angalekanitsidwe, ndipo ma wavelength onse awiri amatha kugwedezeka mkati mwa resonant cavity. Malinga ndi mfundo ya dual-wavelength oscillation ya grating yopingasa, mu kuyesera, njira yolumikizira yofanana ingagwiritsidwe ntchito kuti ikwaniritse. Pa nthawi yowotcherera, ma axel osunga polarization a ma grating awiriwa amalumikizidwa. Mwanjira imeneyi, ma transmission peaks awiri a high-reflection grating amafanana ndi a low-reflection grating, motero kutulutsa kwa laser kwa dual-wavelength kumatha kuchitika.
Mu machitidwe enieni osungira polarization ya laser, linear skew ndi chizindikiro chofunikira poyesa mawonekedwe a ma laser opangidwa ndi polarized linearly. Kawirikawiri, nthawi ya grating yowunikira kwambiri imakhala yayikulu kuposa ya grating yowunikira pang'ono. Kuti mupeze laser yowunikira bwino yokhala ndi PER yapamwamba, peak imodzi yokha ya polarization iyenera kugwedezeka. Pamene axis yofulumira ya grating yowunikira pang'ono ili motsatira axis yocheperako ya grating yowunikira kwambiri, kutalika kwa kutalika kwa axis yofulumira kwa grating yowunikira pang'ono kumafanana ndi komwe kuli pang'onopang'ono kwa grating yowunikira kwambiri, pomwe peak yotumizira pang'onopang'ono ya grating yowunikira pang'ono sikugwirizana ndi peak yotumizira pang'onopang'ono ya grating yowunikira kwambiri. Mwanjira imeneyi, peak imodzi yotumizira imatha kugwedezeka. Mofananamo, pamene mzere wocheperako wa grating yowunikira pang'ono uli pambali pa mzere wofulumira wa grating yowunikira kwambiri, kutalika kwa mafunde apakati a mzere wocheperako wa grating yowunikira pang'ono kumafanana ndi kwa mzere wofulumira wa grating yowunikira kwambiri, pomwe nsonga yotumizira ya mzere wofulumira wa grating yowunikira pang'ono sikugwirizana ndi nsonga yocheperako ya grating yowunikira kwambiri. Mwanjira imeneyi, nsonga imodzi yotumizira imatha kugwedezeka. Njira ziwiri zonsezi zomwe zili pamwambapa zitha kukwaniritsa kutulutsa kwa laser kolumikizidwa molunjika. Malinga ndi mfundo ya single-wavelength linearly polarized laser oscillation ya grating yosunga polarization, mu kuyesera, njira yolumikizira ya orthogonal ingagwiritsidwe ntchito kuti ikwaniritse. Pamene ngodya yolumikizira ya ma axes osunga polarization a grating yowunikira kwambiri ndi grating yowunikira yotsika ili 90°, nsonga yotumizira mu axis yocheperako ya grating yowunikira kwambiri ikugwirizana ndi nsonga yotumizira mu axis yofulumira ya grating yowunikira yotsika, motero kutulutsa kwa laser ya fiber yolumikizidwa ndi mafunde amodzi kumatha kuchitika.
Nthawi yotumizira: Sep-12-2025