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Achieving Long Distance Sensing Using Semiconductor Laser with Optical Feedback by Operating at Switching Status.

Bairun Nie¹, Yuxi Ruan¹, Yanguang Yu¹

¹School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia.

Sensors (Basel, Switzerland)

|February 15, 2022

Summary

This summary is machine-generated.

This study introduces a novel distance sensing method using a semiconductor laser (SL) with optical feedback (OF). The technique leverages inherent SL dynamics for square-wave intensity modulation, enabling robust, long-distance measurements without external modulators.

Keywords:

Hopf-bifurcation distance sensing laser dynamics optical feedback semiconductor laser

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Area of Science:

Nonlinear Dynamics
Semiconductor Laser Physics
Optical Sensing

Background:

Semiconductor lasers with optical feedback (SL OF) are used for distance measurements.
Existing methods often require external modulation devices, limiting performance and range.
Nonlinear dynamics in SL OF systems offer potential for novel sensing applications.

Purpose of the Study:

To present a novel distance sensing method utilizing the nonlinear dynamics of a semiconductor laser (SL) with optical feedback (OF).
To demonstrate a square-wave intensity modulation without external electronic or optical devices.
To investigate the system's robustness and applicability for long-distance sensing.

Main Methods:

Operating a semiconductor laser (SL) in a switching status between stable and period-one nonlinear dynamic states.
Utilizing the inherent SL dynamics for intrinsic square-wave intensity modulation.
Analyzing the impact of controllable parameters on the duty cycle for robust operation.

Main Results:

Successful generation of square-wave modulated laser intensity by exploiting inherent SL dynamics.
Demonstration of a new approach for long-distance sensing with improved performance compared to existing SL OF systems.
Identification of key parameters for maintaining robust operation at the switching status.

Conclusions:

The proposed method offers a novel, robust, and potentially long-range distance sensing capability.
Leveraging nonlinear dynamics in SL OF systems bypasses the need for external modulation.
The study validates the sensing approach through both simulation and experimental verification.