ʻO ka noiʻi hou loa e pili ana i nā lasers semiconductor kala ʻelua

ʻO ka noiʻi hou loa e pili ana i nā lasers semiconductor kala ʻelua

ʻO nā lasers disc Semiconductor (SDL lasers), i ʻike ʻia hoʻi he vertical external cavity surface-emitting lasers (VECSEL), ua huki nui ʻia ka manaʻo i nā makahiki i hala iho nei. Hoʻohui ia i nā pono o ka semiconductor gain a me nā resonators solid-state. ʻAʻole ia e hōʻoluʻolu wale i ka palena o ka hoʻokuʻu ʻana o ke kākoʻo mode hoʻokahi no nā lasers semiconductor maʻamau, akā hōʻike pū kekahi i kahi hoʻolālā bandgap semiconductor flexible a me nā ʻano loaʻa mea kiʻekiʻe. Hiki ke ʻike ʻia ma nā ʻano noi like ʻole, e like me ka walaʻau haʻahaʻa.laser laulā haikika hoʻopuka ʻana, ka hanauna pulse kiʻekiʻe-hoʻihoʻi pōkole loa, ka hanauna harmonic kauoha kiʻekiʻe, a me ka ʻenehana hōkū alakaʻi sodium, a pēlā aku. Me ka holomua o ka ʻenehana, ua kau ʻia nā koi kiʻekiʻe no kona maʻalahi o ka nalu. No ka laʻana, ua hōʻike nā kumu kukui coherent dual-wavelength i ka waiwai noi kiʻekiʻe loa i nā kahua e kū mai ana e like me ka anti-interference lidar, holographic interferometry, wavelength division multiplexing communication, mid-infrared a i ʻole terahertz generation, a me nā multi-color optical frequency combs. Pehea e hoʻokō ai i ka hoʻokuʻu kala pālua kiʻekiʻe i nā lasers disc semiconductor a kāohi pono i ka hoʻokūkū loaʻa ma waena o nā nalu he nui he paʻakikī mau ia ma kēia kahua.

I kēia mau lā iho nei, he kala pālualaser semiconductorUa hāpai ka hui ma Kina i kahi hoʻolālā chip hou e hoʻoponopono ai i kēia pilikia. Ma o ka noiʻi helu hohonu, ua ʻike lākou ʻo ka hoʻoponopono pololei ʻana i ka kānana loaʻa lua quantum e pili ana i ka mahana a me nā hopena kānana microcavity semiconductor e manaʻo ʻia e hoʻokō i ka mana maʻalahi o ka loaʻa kala pālua. Ma muli o kēia, ua hoʻolālā maikaʻi ka hui i kahi chip loaʻa ʻālohilohi kiʻekiʻe 960/1000 nm. Hana kēia laser ma ke ʻano kumu kokoke i ka palena diffraction, me ka mālamalama puka e like me 310 MW/cm²sr.

He mau micrometers wale nō ka mānoanoa o ka papa loaʻa o ka disc semiconductor, a ua hoʻokumu ʻia kahi microcavity Fabry-Perot ma waena o ka interface semiconductor-air a me ka mea hoʻomālamalama Bragg i hoʻolaha ʻia ma lalo. ʻO ka mālama ʻana i ka microcavity semiconductor ma ke ʻano he kānana spectral i kūkulu ʻia o ka chip e hoʻololi i ka loaʻa o ka luawai quantum. I kēia manawa, ʻokoʻa nā helu drift mahana o ka hopena kānana microcavity a me ka loaʻa semiconductor. I ka hui pū ʻana me ka kaohi mahana, hiki ke hoʻokō ʻia ka hoʻololi a me ka hoʻoponopono ʻana o nā nalu hoʻopuka. Ma muli o kēia mau ʻano, ua helu ka hui a hoʻonohonoho i ka piko loaʻa o ka luawai quantum ma 950 nm ma ka mahana 300 K, me ka helu drift mahana o ka nalu loaʻa ma kahi o 0.37 nm/K. Ma hope mai, ua hoʻolālā ka hui i ka longitudinal constraint factor o ka chip me ka hoʻohana ʻana i ke ʻano matrix transmission, me nā nalu peak o kahi o 960 nm a me 1000 nm. Ua hōʻike nā simulations he 0.08 nm/K wale nō ka helu drift mahana. Ma ka hoʻohana ʻana i ka ʻenehana hoʻokaʻawale mahu kemika metala-organic no ka ulu ʻana o ka epitaxial a me ka hoʻomau ʻana i ka hoʻonui ʻana i ke kaʻina hana ulu, ua hana pono ʻia nā ʻāpana loaʻa kiʻekiʻe. Ua kūlike loa nā hopena ana o ka photoluminescence me nā hopena simulation. No ka hōʻoluʻolu ʻana i ka ukana wela a hoʻokō i ka hoʻoili mana kiʻekiʻe, ua hoʻomohala hou ʻia ke kaʻina hana hoʻopili ʻāpana semiconductor-diamond.

Ma hope o ka hoʻopau ʻana i ka ʻōpala chip, ua hana ka hui i kahi loiloi piha o kāna hana laser. Ma ke ʻano hana hoʻomau, ma ka kaohi ʻana i ka mana pamu a i ʻole ka mahana o ka wela wela, hiki ke hoʻololi maʻalahi ʻia ka nalu hoʻokuʻu ma waena o 960 nm a me 1000 nm. Ke noho ka mana pamu i loko o kahi laulā kikoʻī, hiki i ka laser ke hoʻokō i ka hana nalu pālua, me ka manawa nalu a hiki i ka 39.4 nm. I kēia manawa, hiki i ka mana nalu hoʻomau kiʻekiʻe loa i 3.8 W. I kēia manawa, hana ka laser ma ke ʻano kumu kokoke i ka palena diffraction, me kahi kumu maikaʻi beam M² o 1.1 wale nō a me ka ʻōlinolino e like me ke kiʻekiʻe o 310 MW/cm²sr. Ua hana pū ka hui i ka noiʻi ʻana i ka hana nalu quasi-continuous o kalaserUa nānā pono ʻia ka hōʻailona alapine huina ma ka hoʻokomo ʻana i ka kristal optical nonlinear LiB₃O₅ i loko o ka lua resonant, e hōʻoia ana i ka hoʻonohonoho ʻana o nā nalu pālua.

Ma o kēia hoʻolālā chip akamai, ua hoʻokō ʻia ka hui pū ʻana o ka kānana loaʻa lua quantum a me ka kānana microcavity, e kau ana i kahi kahua hoʻolālā no ka hoʻokō ʻana i nā kumu laser kala ʻelua. Ma ke ʻano o nā hōʻailona hana, loaʻa i kēia laser kala ʻelua-chip hoʻokahi ka ʻōlinolino kiʻekiʻe, ka maʻalahi kiʻekiʻe a me ka hoʻopuka kukuna coaxial pololei. Aia kona ʻōlinolino ma ka pae alakaʻi honua ma ke kahua o kēia manawa o nā lasers semiconductor kala ʻelua-chip hoʻokahi. Ma ke ʻano o ka hoʻohana pono ʻana, manaʻo ʻia kēia hoʻokō e hoʻomaikaʻi pono i ka pololei o ka ʻike ʻana a me ka hiki ke kūʻē i ka hoʻopilikia ʻana o ka lidar multi-color i nā wahi paʻakikī ma o ka hoʻohana ʻana i kona ʻōlinolino kiʻekiʻe a me nā ʻano kala ʻelua. Ma ke kahua o nā hui alapine optical, hiki i kāna hopena lōʻihi-nalu pālua paʻa ke hāʻawi i ke kākoʻo koʻikoʻi no nā noi e like me ke ana spectral pololei a me ka ʻike optical hoʻonā kiʻekiʻe.