Erdieroaleen laser anplifikadorea

Theerdieroale laser anplifikadorea(Semiconductor Optical Amplifier, SOA izenarekin laburtua) laser erdieroale baten anplifikazio-printzipio bera du, eta energia-mailen arteko trantsizioen zirrara-fenomenoa ere erabiltzen du anplifikazio optikorako. Irabazia handitzeko, jendeak laser oszilazioa osatzen duen erresonantzia-barrunbea kendu dute eta korronteak zuzenean kitzikatzen ditu 30dB (1000 aldiz) baino gehiagoko irabazi optikoa lortzeko.
There are three types of erdieroale laser anplifikadoreas. One is to use ordinary semiconductor lasers as optical amplifiers, called Fabry-Perot (F-P) erdieroale laser anplifikadoreas (FPA); the other is to coat the two end faces of the F-P laser Anti-reflection film to obtain broadband, high output and low noise. This type of amplifier amplifies light during the travel of light, so it is called traveling wave optical amplifier (TWLA) and there is also an injection lock-in amplifier (IL-SOA), which is identical in structure to F-P-SLA. But it is biased above the threshold current. If weak single-mode light is injected into this amplifier, a high-power single-mode output will be obtained.