Hoʻolālā ala optical o ka laser polarized fiber narrow-linewidth

Hoʻolālā ala optical o ka fiber polarizedlaser laulā haiki

1. ʻIke laulā

1018 nm polarized fiber narrow-linewidth laser. ʻO ka nalu hana he 1018 nm, ʻo ka mana hoʻopuka laser he 104 W, ʻo nā laulā spectral o 3 dB a me 20 dB he ~21 GHz a me ~72 GHz pakahi, ʻo ka lakio extinction polarization he >17.5 dB, a kiʻekiʻe ke ʻano o ke kukuna (2 x M - 1.62 a me 2 y M) Aʻōnaehana laserme ka pono o ka pali o 79% (∼1.63).

2. Ka wehewehe ʻana o ke ala ʻōniʻoniʻo

I loko o kahilaser laulā laina haiki i hoʻopili ʻia me ka fiber polarized, ua haku ʻia ka oscillator laser fiber polarized linearly me kahi pālua o nā gratings fiber mālama polarization a me kahi fiber mālama polarization pālua 1.5-mika ka lōʻihi he 10/125 μm ytterbium-doped ma ke ʻano he medium gain. ʻO ke coefficient absorption o kēia fiber optical ma 976 nm he 5 dB/m. Hoʻopili ʻia ka oscillator laser e kahi 976 nm wavelength-lockedlaser semiconductorme ka mana kiʻekiʻe loa o 27 W ma o kahi mea hoʻohui kukuna mālama polarity (1+1)×1. ʻOi aku ka reflectivity o ka grating reflection kiʻekiʻe ma mua o 99%, a ʻo ka bandwidth reflection 3 dB ma kahi o 0.22 nm. ʻO ka reflectivity haʻahaʻa o ka grating he 40%, a ʻo ka bandwidth reflection 3 dB ma kahi o 0.216 nm. ʻO nā nalu reflection waena o nā gratings ʻelua ma 1018 nm. No ke kaulike ʻana i ka mana hoʻopuka o ka resonator laser a me ka ratio suppression ASE, ua hoʻonohonoho ʻia ka reflectivity haʻahaʻa o ka grating i 40%. Hoʻohui ʻia ka fiber huelo o ka grating reflection kiʻekiʻe i ka fiber loaʻa, ʻoiai ua hoʻohuli ʻia ka fiber huelo o ka grating reflection haʻahaʻa 90° a hoʻohui ʻia i ka fiber huelo o ke kānana cladding. No laila, ʻo ke kūlana kiʻekiʻe o ka nalu reflection axis wikiwiki o ka grating reflection kiʻekiʻe e kūlike me ka nalu reflection axis lohi o ka grating reflection haʻahaʻa. Ma kēia ʻano, hoʻokahi wale nō laser polarized e hiki ke oscillate i loko o ka lua resonant. Hoʻokaʻawale ʻia ke kukui pamu i koe i loko o ka pale fiber optical e kahi kānana cladding i hana ʻia e ia iho i hoʻohui ʻia i loko o ka lua resonant, a ua beveled ʻia ka pigtail output e 8° e pale aku i ka pane ʻana o ka maka hope a me ka oscillation parasitic.

3. ʻIke hope

ʻO ke ʻano hana o nā lasers fiber polarized linearly: Ma muli o ke kaumaha birefringence, ʻo ka fiber mālama polarization ʻano pear he ʻelua mau axes polarization orthogonal, i ʻike ʻia ʻo ka axis wikiwiki a me ka axis lohi. Ma ke ʻano laulā, ʻoiai ʻoi aku ka nui o ka index refractive o ka axis lohi ma mua o ka axis wikiwiki, ʻo ka grating i kākau ʻia ma ka fiber mālama polarization he ʻelua mau nalu waena like ʻole. ʻO ka lua resonant o kahi laser fiber polarized linearly i haku pinepine ʻia me ʻelua mau gratings mālama polarization. ʻO nā nalu o ka grating reflection haʻahaʻa a me ka grating reflection kiʻekiʻe ma ka axis wikiwiki a me ka axis lohi e pili ana. Ke lawa ka bandwidth reflection o ka grating mālama polarization, hiki ke hoʻokaʻawale ʻia nā spectra hoʻoili ma ke axis wikiwiki a me nā kuhikuhi axis lohi, a hiki i nā nalu ʻelua ke haʻalulu i loko o ka lua resonant. Wahi a ke kumumanaʻo oscillation dual-wavelength o ka grating mālama polarization, i ka hoʻokolohua, hiki ke hoʻohana ʻia ke ʻano hoʻoheheʻe like e hoʻokō ai. I ka wā o ka hoʻopili ʻana, ua hoʻonohonoho pono ʻia nā koʻi mālama polarization o nā gratings ʻelua. Ma kēia ʻano, ua kūlike nā piko hoʻoili ʻelua o ka grating reflection kiʻekiʻe me nā piko o ka grating reflection haʻahaʻa, a no laila hiki ke hoʻokō ʻia ka hopena laser dual-wavelength.

I loko o nā ʻōnaehana mālama polarization laser maoli, ʻo ka linear skew kahi hōʻailona koʻikoʻi no ka loiloi ʻana i nā ʻano hopena o nā lasers polarized linearly. Ma keʻano laulā, ʻoi aku ka lōʻihi o ka manawa o kahi grating reflectance kiʻekiʻe ma mua o kahi grating reflectance haʻahaʻa. No ka hoʻokō ʻana i kahi laser polarized linearly me ka waiwai PER kiʻekiʻe, hoʻokahi wale nō piko polarization e pono ai ke haʻalulu. Ke hele ka axis wikiwiki o ka grating reflectance haʻahaʻa ma ke axis lohi o ka grating reflectance kiʻekiʻe, ʻO ka nalu waena ma ke kuhikuhi axis wikiwiki o ka grating reflectance haʻahaʻa e like me ia ma ke kuhikuhi axis lohi o ka grating reflectance kiʻekiʻe, ʻoiai ʻo ka piko hoʻoili ma ke kuhikuhi axis lohi o ka grating reflectance haʻahaʻa ʻaʻole like me ka piko hoʻoili ma ke kuhikuhi axis wikiwiki o ka grating reflectance kiʻekiʻe. Ma kēia ʻano, hiki ke haʻalulu ʻia kekahi piko hoʻoili. Pēlā nō, i ka wā e pili ana ke axis lohi o kahi grating reflectance haʻahaʻa ma ke axis wikiwiki o kahi grating reflectance kiʻekiʻe, ʻo ka nalu waena o ke axis lohi o ka grating reflectance haʻahaʻa e like me ke axis wikiwiki o ka grating reflectance kiʻekiʻe, ʻoiai ʻaʻole kūlike ka piko hoʻoili o ke axis wikiwiki o ka grating reflectance haʻahaʻa i ke axis lohi o ka grating reflectance kiʻekiʻe. Ma kēia ʻano, hiki ke hoʻoluliluli ʻia kekahi piko hoʻoili. Hiki i nā ʻano ʻelua i luna ke hoʻokō i ka hopena laser polarized linearly. Wahi a ke kumumanaʻo oscillation laser polarized linearly polarized hoʻokahi-wavelength o ka grating mālama polarization, i ka hoʻokolohua, hiki ke hoʻohana ʻia ke ʻano splicing orthogonal e hoʻokō ai. Ke 90° ke kihi splicing o nā axis mālama polarization o ka grating reflection kiʻekiʻe a me ka grating reflection haʻahaʻa, ʻo ka piko hoʻoili ma ke kuhikuhi axis lohi o ka grating reflection kiʻekiʻe e pili ana i ka piko hoʻoili ma ke kuhikuhi axis wikiwiki o ka grating reflection haʻahaʻa, a pēlā e hiki ai ke hoʻokō ʻia ka hopena o ka laser fiber polarized linearly polarized hoʻokahi-wavelength.