Kūkākūkā nui: nā lasers linewidth haiki

Kūkākūkā nui:nā laser ākea laina haiki

Laser ākea laina haikihe ʻano laser me nā waiwai optical kūikawā, kahi i hōʻike ʻia e ka hiki ke hana i kahi kukuna laser me kahi linewidth optical liʻiliʻi loa (ʻo ia hoʻi, nā kiko kikoʻī). ʻO ka laulā laina o ka laser linewidth haiki e pili ana i ka laula o kona spectrum, i hōʻike pinepine ʻia i ka bandwidth i loko o kahi alapine, a ua ʻike ʻia kēia laula ʻo "spectral line width" a i ʻole "line width". He laula laina haiki ko na laser laulaina haiki, ma waena o kekahi mau haneli kilohertz (kHz) a me kekahi mau megahertz (MHz), he ʻoi aku ka liʻiliʻi ma mua o ka laulā laina spectral o nā lasers maʻamau.

Hoʻokaʻawale ʻia ma ke ʻano o ka lua:

1. Hoʻokaʻawale ʻia nā laser cavity fiber i hoʻokaʻawale ʻia i ke ʻano noʻonoʻo Bragg (DBR Laser) a me ke ʻano pane hāʻawi (DFB Laser) elua hale. ʻO ka laser hoʻopuka o nā laser ʻelua he kukui koʻikoʻi me ka laina laina haʻahaʻa a me ka leo haʻahaʻa. Hiki i ka DFB fiber laser ke hoʻokō i nā pane laser ʻelua alaserke koho mode, no laila ua maikaʻi ka paʻa ʻana o ke alapine laser puka, a ʻoi aku ka maʻalahi o ka loaʻa ʻana o ka hoʻopuka mode longitudinal paʻa.

2. Hoʻopuka nā lasers ring-cavity fiber i nā lasers ākea ākea ma o ka hoʻokomo ʻana i nā kānana haiki e like me Fabry-Perot (FP) interference cavities, fiber grating a i ʻole sagnac ring cavities i loko o ka lua. Eia nō naʻe, ma muli o ka lōʻihi o ka lua, he liʻiliʻi ka manawa lōʻihi, a he maʻalahi ke lele i ke ʻano ma lalo o ka mana o ke kaiapuni, a ʻilihune ka paʻa.

Hoʻohana huahana:

1. Optical sensor Narrow-width laser ma ke ʻano he kumu kukui kūpono no nā mea ʻike fiber optical, ma ka hui pū ʻana me nā mea ʻike fiber optical, hiki ke hoʻokō i ke ana kiʻekiʻe, kiʻekiʻe-sensitivity. No ka laʻana, i ke kaomi a i ʻole ka wela o ka fiber optic sensor, ʻo ke kūpaʻa o ka laser linewidth haiki e kōkua i ka hōʻoia i ka pololei o nā hopena ana.

2. ʻO ke ana kikoʻī kiʻekiʻe ʻO nā lasers linewidth haiki loa nā laula laina kikoʻī, e hoʻolilo iā lākou i kumu kūpono no nā spectrometers hoʻonā kiʻekiʻe. Ma ke koho ʻana i ka lōʻihi hawewe kūpono a me ka laulā laina, hiki ke hoʻohana ʻia nā lasers linewidth haiki no ka loiloi spectral pololei a me ke ana spectral. No ka laʻana, i nā mea ʻike kinoea a me ka nānā ʻana i ke kaiapuni, hiki ke hoʻohana ʻia nā lasers linewidth haiki e hoʻokō i nā ana kūpono o ka absorption optical, emission optical a me nā spectra molecular i ka lewa.

3. Lidar hoʻokahi-frequency haiki laina-ākea fiber lasers no hoi koʻikoʻi noi i ka liDAR a laser ranging nenoai. Me ka hoʻohana ʻana i hoʻokahi alapine laina haiki laula fiber laser ma ke ʻano he kumu kukui ʻike, i hui pū ʻia me ka ʻike coherence optical, hiki iā ia ke kūkulu i kahi lōʻihi (haneri kilomika) liDAR a i ʻole rangefinder. Loaʻa i kēia kumukānāwai ke kumu hana like me ka ʻenehana OFDR i ka fiber optical, no laila ʻaʻole ia he kiʻekiʻe kiʻekiʻe spatial hoʻonā, akā hiki ke hoʻonui i ka mamao ana. I loko o kēia ʻōnaehana, ʻo ka laulā laina kikoʻī laser a i ʻole ka lōʻihi coherence e hoʻoholo i ke ana ʻana o ka mamao a me ke ana pololei ʻana, no laila ʻoi aku ka maikaʻi o ka coherence o ke kumu kukui, ʻoi aku ka kiʻekiʻe o ka hana o ka ʻōnaehana holoʻokoʻa.