Abstract

We theoretically and experimentally demonstrate a method for measuring the phase and intensity noise and their correlation in superluminescent diodes. A Michelson interferometer containing strongly unbalanced paths has been developed to measure the noise. By the spectral analysis of the photocurrents in detectors, the intensity noise is about twice the value of the phase noise in the superluminescent diode. The more interesting result we obtained is the experimental evidence that the intensity noise and the phase noise are mutually independent. The correlation coefficient of the intensity noise and the phase noise fluctuates between $-0.08$ and 0, which shows scarcely any sign of amplitude-phase noise correlation. The results offer a basic premise for the analysis of broadband light sources.

© 2017 Optical Society of America

Reduced phase noise in an erbium frequency comb via intensity noise suppression

A. D. Brandt, S. F. Cooper, Z. Burkley, and D. C. Yost
Opt. Express 25(15) 18175-18181 (2017)

Low-frequency intensity noise in semiconductor lasers

M. M. Hall and J. L. Carlsten
Appl. Opt. 35(33) 6438-6444 (1996)

Reduction of semiconductor laser diode phase and amplitude noise in interferometric fiber optic sensors

T. P. Newson, F. Farahi, J. D. C. Jones, and D. A. Jackson
Appl. Opt. 28(19) 4210-4215 (1989)

Phase noise characteristics of a diode-pumped Nd:YAG laser in an unbalanced fiber-optic interferometer

Zhou Meng, Yongming Hu, Shuidong Xiong, George Stewart, Gillian Whitenett, and Brian Culshaw
Appl. Opt. 44(17) 3425-3428 (2005)

Phase noise characterization of a QD-based diode laser frequency comb

Govind Vedala, Mustafa Al-Qadi, Maurice O’Sullivan, John Cartledge, and Rongqing Hui
Opt. Express 25(14) 15890-15904 (2017)