Kodi ukadaulo wosintha laser ndi chiyani?

Kodi ndi chiyanikusintha kwa laserukadaulo

Kuwala ndi mtundu wa mafunde amagetsi okhala ndi ma frequency apamwamba. Kuli ndi mgwirizano wabwino kwambiri motero, monga mafunde am'mbuyomu amagetsi (monga ma wailesi ndi ma TV), kungagwiritsidwe ntchito ngati chonyamulira potumiza chidziwitso. Chidziwitso "chonyamulidwa" ndi laser (kuphatikiza chilankhulo, zolemba, zithunzi, zizindikiro, ndi zina zotero) chimatumizidwa kwa wolandila kudzera munjira zina zotumizira (mlengalenga, ulusi wa kuwala, ndi zina zotero), kenako nkuzindikirika ndikubwezeretsedwa ku chidziwitso choyambirira ndi wolandila kuwala. Njira yoyika chidziwitso pa laser imatchedwa modulation, ndipo chipangizo chomwe chimakwaniritsa njirayi chimatchedwa modulator. Pakati pawo, laser imatchedwa carrier wave; Chidziwitso cha low-frequency chomwe chimagwira ntchito yolamulira chimatchedwa modulated signal.

Kusintha kwa laser kungagawidwe m'magulu awiri: mkati ndi kunja.

Kusintha kwamkati: Kumatanthauza kukweza kwa zizindikiro zosinthidwa panthawi ya njira yosinthasintha ya laser, kutanthauza kugwiritsa ntchito zizindikiro zosinthidwa kusintha magawo a oscillation a laser, potero kusintha makhalidwe a laser output kuti akwaniritse modulation. Njira zosinthira mkati zimaphatikizapo: 1. Kuwongolera mwachindunji magetsi a laser pump kuti akwaniritse mphamvu ya laser output yosinthidwa. Mphamvu ndi kupezeka kwa zotulutsa zonse zimayendetsedwa ndi magetsi. Ngati chizindikiro chomwe chikutumizidwa chikugwiritsidwa ntchito kuwongolera magetsi a laser, ndikupanga kusintha kwamagetsi kudzera mu laser yolamulidwa ndi chizindikiro, ndiye kuti laser yotulutsidwayo idzawongoleredwanso ndi chizindikiro. 2. Zinthu zosinthira zimayikidwa mkati mwa resonant cavity, ndipo mawonekedwe enieni a zinthu zosinthira amawongoleredwa ndi zizindikiro kuti zisinthe, potero kusintha magawo a resonant cavity ndikusintha makhalidwe a laser output kuti akwaniritse modulation. Ubwino wa kusintha kwamkati ndi mphamvu yake yapamwamba yosinthira. Vuto lake ndilakuti popeza modulator imayikidwa mkati mwa cavity, ndizofanana ndi kuwonjezera kutayika mkati mwa cavity, kuchepetsa mphamvu yotulutsa, ndipo bandwidth ya modulator imachepetsedwa ndi passband ya cavity ya resonant.

Kusintha kwakunja: Kumatanthauza kuyika kwa modulator panjira yowunikira kunja kwa laser laser ikapangidwa, ndipo mawonekedwe akuthupi a modulator amasinthidwa ndi chizindikiro cha kusintha. Pamene laser imadutsa mu modulator, gawo linalake la mafunde owala lidzasinthidwa. Ubwino wa kusintha kwakunja ndikuti sikukhudza mphamvu yotulutsa ya laser ndipo bandwidth ya jenereta siimangokhala ndi passband ya resonant cavity. Vuto lake ndilakuti mphamvu yosinthira yochepa.

Kusinthasintha kwa laser kumatha kugawidwa m'magulu awiri: amplitude modulation, frequency modulation, phase modulation ndi intensity modulation, ndi zina zotero. Malinga ndi mtundu wake wa modulation. Ma modulators ofanana nawo akuphatikizapoma modulators a gawo, ma modulator amphamvu, ndi zina zotero. Kupatula kusintha kwa mphamvu ya electro-optic ndi electro-optic phase modulation komwe kwatchulidwa pamwambapa, pali mitundu yambiri yama modulators a lasermonga chopingasama modulators a electro-optic, ma modulators a mafunde oyenda ndi electro-optic, ma modulators a Kerr electro-optic, ma modulators a acousto-optic, ma modulators a magneto-optic, ma modulators osokoneza ndi ma modulators a kuwala kwa malo, ndi zina zotero.