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

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

ʻO Semiconductor disc lasers (SDL lasers), i ʻike ʻia he vertical external cavity surface-emitting lasers (VECSEL), ua hoʻokipa nui ʻia i nā makahiki i hala. Hoʻohui ia i nā pono o ka loaʻa semiconductor a me nā resonator solid-state. ʻAʻole wale ia e hoʻohaʻahaʻa i ka palena o ka hoʻokuʻu ʻana o ke kākoʻo hoʻokahi-mode no nā laser semiconductor maʻamau, akā ua hōʻike pū kekahi i kahi hoʻolālā bandgap semiconductor a me nā hiʻohiʻona waiwai kiʻekiʻe. Hiki ke ʻike ʻia i loko o kahi ākea o nā hiʻohiʻona noi, e like me ka haʻahaʻa haʻahaʻalaser laula laina haikihuahana, ultra-short high-repetition pulse generation, high-order harmonic generation, and sodium guide star enehana, etc. No ka laʻana, ua hōʻike nā kumu kukui coherent ʻelua-lōʻihi i ka waiwai noi kiʻekiʻe loa i nā kula e puka mai ana e like me ka anti-interference lidar, holographic interferometry, ka hawewe hawewe multiplexing communication, mid-infrared or terahertz generation, a me nā huila ʻano optical multi-color. Pehea e hoʻokō ai i ka hoʻokuʻu ʻana i nā kala ʻelua i ka semiconductor disc lasers a me ka hoʻopaʻa pono ʻana i ka hoʻokūkū ma waena o nā lōʻihi hawewe he mau pilikia noiʻi ma kēia kahua.

ʻO ka mea i hala koke aku nei, kahi kala ʻelualaser semiconductorUa hoʻolālā ka hui ma Kina i kahi hoʻolālā chip hou e hoʻoponopono i kēia pilikia. Ma o ka noiʻi helu hohonu, ua ʻike lākou ʻo ka hoʻoponopono pololei ʻana i ke kānana waiwai nui pili i ka wela a me nā hopena kānana semiconductor microcavity e manaʻo ʻia e hoʻokō i ka mana maʻalahi o ka loaʻa ʻana o nā kala ʻelua. Ma muli o kēia, ua hoʻolālā maikaʻi ka hui i kahi chip 960/1000 nm kiʻekiʻe. Ke holo nei kēia laser ma ke ʻano kumu ma kahi kokoke i ka palena ʻokoʻa, me ka ʻōlinolino puka kiʻekiʻe ma kahi o 310 MW/cm²sr.

He liʻiliʻi wale nō ka mānoanoa o ka papa loaʻa o ka disiki semiconductor, a ua hoʻokumu ʻia kahi microcavity Fabry-Perot ma waena o ke kikowaena semiconductor-air a me ka mea hōʻike Bragg i hāʻawi ʻia i 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 quantum well. I kēia manawa, ʻokoʻa ka hopena kānana microcavity a me ka loaʻa semiconductor. Hoʻohui pū ʻia me ka mana wela, hiki ke hoʻokō ʻia ka hoʻololi ʻana a me ka hoʻoponopono ʻana i nā lōʻihi hawewe puka. Ma muli o kēia mau hiʻohiʻona, ua helu ka hui a hoʻonohonoho i ka piko loaʻa o ka lua quantum ma 950 nm ma 300 K wela, me ka neʻe ʻana o ka wela o ka hawewe loaʻa ma kahi o 0.37 nm/K. Ma hope mai, ua hoʻolālā ka hui i ka mea hoʻopaʻa lōʻihi o ka chip me ka hoʻohana ʻana i ke ʻano matrix transmission, me nā lōʻihi hawewe ma kahi o 960 nm a me 1000 nm. Ua hōʻike ʻia nā simulation he 0.08 nm/K wale nō ka nui o ka hoʻoheheʻe wela. Ma ka hoʻohana ʻana i ka ʻenehana hoʻoheheʻe kemika metala-organic no ka ulu ʻana o ka epitaxial a me ka hoʻomau mau ʻana i ke kaʻina o ka ulu ʻana, ua hana maikaʻi ʻia nā ʻāpana waiwai kiʻekiʻe. ʻO nā hualoaʻa ana o photoluminescence ua kūlike loa me nā hopena simulation. No ka hoʻohaʻahaʻa ʻana i ka ukana wela a hoʻokō i ka hoʻoili mana kiʻekiʻe, ua hoʻomohala hou ʻia ke kaʻina hana hoʻopihapiha semiconductor-diamond chip.

Ma hope o ka hoʻopau ʻana i ka puʻupuʻu chip, ua hana ka hui i kahi loiloi piha o kāna hana laser. Ma ke ʻano hana hoʻomau, ma ka hoʻomalu ʻana i ka mana pahū a i ʻole ka wela wela, hiki ke hoʻololi maʻalahi ka lōʻihi o ka hawewe ma waena o 960 nm a me 1000 nm. Aia ka mana o ka pahū i loko o kahi kikoʻī kikoʻī, hiki i ka laser ke hoʻokō i ka hana ʻelua-lōʻihi, me kahi manawa hawewe a hiki i 39.4 nm. I kēia manawa, hiki i ka mana hawewe mau loa i ka 3.8 W. I kēia manawa, hana ka laser ma ke ʻano kumu ma kahi kokoke i ka palena diffraction, me kahi kumu beam quality factor M² o 1.1 wale nō a me ka ʻōlinolino kiʻekiʻe ma kahi o 310 MW/cm²sr. Ua alakaʻi pū ka hui i ka noiʻi ʻana i ka hana nalu quasi-continuous o kalaser. Ua ʻike maikaʻi ʻia ka hōʻailona huina alapine ma ka hoʻokomo ʻana i ka LiB₃O₅ nonlinear optical crystal i loko o ka lua resonant, e hōʻoiaʻiʻo ana i ka hoʻonohonoho ʻana o nā nalu ʻelua.

Ma o kēia hoʻolālā chip akamai, ua hoʻokō ʻia ka hui ʻana o ka quantum well gain filtering a me ka kānana microcavity, e waiho ana i kahi kumu hoʻolālā no ka hoʻokō ʻana i nā kumu laser ʻelua kala. Ma nā ʻōlelo o nā hōʻailona hana, ua loaʻa i kēia laser ʻelua kala kala hoʻokahi i ka ʻōlinolino kiʻekiʻe, kiʻekiʻe kiʻekiʻe a me ka hoʻopuka coaxial beam pololei. Aia kona ʻōlinolino ma ka pae alakaʻi honua ma ke kahua o nā lasers semiconductor ʻelua ʻāpana kala hoʻokahi. Ma ka ʻōlelo o ka hoʻohana pono ʻana, manaʻo ʻia kēia hoʻokō e hoʻomaikaʻi maikaʻi i ka pololei o ka ʻike a me ka hiki anti-interference o ka lidar multi-color i loko o nā kaiapuni paʻakikī ma o ka hoʻohana ʻana i kona ʻālohilohi kiʻekiʻe a me nā ʻano kala ʻelua. Ma ke kahua o ka optical frequency combs, hiki i kāna puka paʻa ʻelua-lōʻihi ke hāʻawi i ke kākoʻo koʻikoʻi no nā noi e like me ke ana kikoʻī kikoʻī a me ka ʻike optical kiʻekiʻe.