Open AccessСпектральные характеристики полукольцевых квантово-каскадных лазеров
Author(s) -
А.В. Бабичев,
Daniil Pashnev,
А.Г. Гладышев,
А.С. Курочкин,
Е.С. Колодезный,
Л.Я. Карачинский,
И.И. Новиков,
Д.В. Денисов,
В.В. Дюделев,
Г.С. Соколовский,
Д.А. Фирсов,
Л.Е. Воробьев,
С.О. Слипченко,
А.В. Лютецкий,
Н.А. Пихтин,
А.Ю. Егоров
Publication year - 2020
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/os.2020.08.49715.2-20
Subject(s) - lasing threshold , radius , whispering gallery wave , resonator , laser , optics , materials science , cascade , whispering gallery , radiation , ring (chemistry) , optoelectronics , quantum cascade laser , physics , chemistry , computer security , organic chemistry , chromatography , computer science
A half-ring resonator design of a 7-8 μm range quantum-cascade laser with different radius values has been proposed and implemented. For a quantum-cascade laser with a radius of a half-ring resonator of 191 μm, lasing with a radiation spectrum width of 474 nm (82 cm^-1) was demonstrated at low temperatures. The FSR in such lasers was determined by the whispering gallery modes typical for ring resonators. At room temperature, the width of the lasing spectrum was 190 nm (31 cm^–1), which is caused by a decrease in gain and a possible increase in internal losses with increasing temperature. An increase in the cavity radius up to 291 μm made it possible to realize room temperature lasing with whispering gallery modes with a radiation spectrum width of 249 nm (40 cm^-1), by reducing losses on the mirrors.