Kafukufuku Watsopano pa Laser-Linewidth Laser

Kafukufuku Watsopano payopapatiza-linewidth laser

Narrow-linewidth laser ndiyofunikira pamitundu ingapo ya ntchito monga kuzindikira molondola, spectroscopy, ndi quantum science. Kuphatikiza pa mawonekedwe a spectral, mawonekedwe a spectral ndi chinthu chofunikira, chomwe chimadalira momwe ntchito ikugwiritsidwira ntchito. Mwachitsanzo, mphamvu ya mbali zonse za chingwe cha laser imatha kuyambitsa zolakwika pakuwongolera kwa ma qubits ndikusokoneza kulondola kwa mawotchi a atomiki. Pankhani ya phokoso la ma frequency a laser, magawo a Fourier opangidwa ndi ma radiation okhazikika amalowalasermawonekedwe nthawi zambiri amakhala apamwamba kuposa 105 Hz, ndipo zigawozi zimatsimikizira matalikidwe mbali zonse za mzere. Kuphatikiza chowonjezera cha Henry ndi zinthu zina, malire a quantum, omwe ndi malire a Schawlow-Towns (ST), amafotokozedwa. Pambuyo kuthetsa phokoso luso monga kugwedera patsekeke ndi kutengeka kutalika, malire amatsimikizira m'munsi malire a zotheka ogwira mzere m'lifupi. Choncho, kuchepetsa phokoso la quantum ndi sitepe yofunika kwambiri pakupangayopapatiza-linewidth lasers.

Posachedwapa, ofufuza apanga umisiri watsopano womwe ungachepetse kukula kwa matabwa a laser ndi maulendo oposa zikwi khumi. Kafukufukuyu atha kusinthiratu magawo a quantum computing, mawotchi a atomiki ndi kuzindikira kwa mafunde amphamvu yokoka. Gulu lofufuza lidagwiritsa ntchito mfundo yolimbikitsa kubalalitsidwa kwa Raman kuti ma lasers asangalatse kugwedezeka kwapang'onopang'ono mkati mwazinthuzo. Zotsatira zakuchepetsa kukula kwa mzere ndi nthawi masauzande ambiri kuposa njira zachikhalidwe. M'malo mwake, ndizofanana ndikupereka ukadaulo watsopano wa laser spectral purification womwe ungagwiritsidwe ntchito pamitundu yosiyanasiyana ya ma lasers. Izi zikuyimira kutukuka kofunikira m'munda walaser luso.

Ukadaulo watsopanowu wathetsa vuto lakusintha kwanthawi kochepa kwa mafunde amagetsi komwe kumapangitsa kuti chiyero ndi kulondola kwa matabwa a laser kuchepe. Mu laser yabwino, mafunde onse owala ayenera kulumikizidwa bwino - koma zenizeni, mafunde ena owala amakhala patsogolo pang'ono kapena kumbuyo kwa ena, zomwe zimapangitsa kusinthasintha kwa gawo la kuwala. Kusinthasintha kwa magawowa kumapangitsa "phokoso" mu sipekitiramu ya laser - imasokoneza ma frequency a laser ndikuchepetsa kuyera kwake. Mfundo yaukadaulo wa Raman ndikuti potembenuza zosokoneza kwakanthawi izi kukhala kugwedezeka mkati mwa kristalo wa diamondi, kugwedezeka kumeneku kumatengedwa mwachangu ndikutha (mkati mwa mathililiyoni angapo a sekondi). Izi zimapangitsa kuti mafunde otsalawo azikhala ndi ma oscillation osalala, motero amakwaniritsa chiyero chapamwamba cha spectral ndikupangitsa kuchepa kwakukululaser sipekitiramu.