Open AccessIntensity noise and bandwidth analysis of nanolasers via optical injection
Author(s) -
Zijun Chen,
Suruj S. Deka,
Si Pan,
Shisong Jiang,
Chengcheng Fang,
Yeshaiahu Fainman,
Abdelkrim El Amili
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.008186
Subject(s) - nanolaser , relative intensity noise , superposition principle , optics , laser linewidth , phase noise , semiconductor laser theory , physics , laser , bandwidth (computing) , intensity (physics) , radiant intensity , noise spectral density , noise (video) , lasing threshold , radiation , computer science , noise figure , telecommunications , quantum mechanics , amplifier , artificial intelligence , image (mathematics)
A measurement method that can be used to extract the relative intensity noise of a nanolaser is introduced and analyzed. The method is based on optical injection of emission from a nanolaser, serving as a master oscillator, transferring its intensity fluctuations to a low-noise semiconductor laser serving as a slave oscillator. Using the stochastic rate equation formalism, we demonstrate that the total relative intensity noise of the system is a weighted superposition of the relative intensity noise of individual lasers. We further discuss the analytical relations that can be used to extract the relative intensity noise spectrum of a nanolaser. Finally, we use mutual correlation as a mathematical tool to quantify the degree of resemblance between the injected and extracted intensity fluctuations, theoretically confirming that the spectra are at least 97% correlated within the 3-dB bandwidth when an injection strength is chosen properly.