Vertical-cavity surface-emitting lasers with intracavity contacts and a rhomboidal current aperture for compact atomic clocks

作者：S. A. Blokhin, N. A. Maleev, M. A. Bobrov, A. G. Kuzmenkov, А. П. Васильев, Yu. M. Zadiranov, M. M. Kulagina, A. A. Blokhin, Yu. A. Guseva, A. M. Ospennikov, М. В. Петренко, A. G. Gladyshev, A. Yu. Egorov, I. I. Novikov, L. Ya. Karachinsky, Д. В. Денисов, V. M. Ustinov · 发表于：Quantum Electronics · 年份：2019 · DOI：10.1070/qel16871 · 被引用次数：8 · 研究领域：Atomic and Subatomic Physics Research、Cold Atom Physics and Bose-Einstein Condensates、Advanced Frequency and Time Standards

Single-mode vertical-cavity surface-emitting lasers (VCSELs) with intracavity contacts, composite distributed Bragg reflectors, and a rhomboidal selectively-oxidised current aperture are studied. It is shown that the use of a rhomboidal current aperture allows the light output polarisation to be fixed without using a special surface relief and leads to efficient narrowing of the emission line with retaining a high slope efficiency. The developed VCSELs have a high output power (exceeding 1 mW), a threshold current below 1 mA, an effective modulation frequency exceeding 5 GHz, and a linewidth smaller than 60 MHz at increased (65 – 75 °C) temperatures and are promising for application in compact Cs vapour cell atomic clocks.