A multi-GHz chaotic optoelectronic oscillator based on laser terminal voltage

TL;DR

This paper introduces a novel multi-GHz chaotic optoelectronic oscillator that generates microwave signals directly from the laser diode's terminal voltage, eliminating the need for a photodiode and simplifying the system.

Contribution

It presents a new approach to microwave generation using laser terminal voltage measurement, differing from traditional methods that rely on photodiodes.

Findings

Achieved multi-GHz chaotic microwave signals.

Demonstrated direct voltage-based microwave generation.

Simplified oscillator design without photodiodes.

Abstract

A multi-GHz chaotic optoelectronic oscillator based on an external cavity semiconductor laser (ECL) is demonstrated. Unlike standard optoelectronic oscillators for microwave applications, we do not employ the dynamic light output incident on a photodiode to generate the microwave signal, but instead generate the microwave signal directly by measuring the terminal voltage V (t) of the laser diode of the ECL under constant-current operation, thus obviating the photodiode entirely.