Modeling for optical feedback laser diode operating in period-one oscillation and its application

Area of Science:

• Optoelectronics
• Laser Physics
• Sensing Technology

Background:

• Optical feedback laser diodes (OFLD) exhibit complex dynamics, including period-one oscillation (POO).
• Investigating OFLD-POO behavior can reveal potential sensing applications.

Purpose of the Study:

• To explore the sensing capability of an OFLD operating in POO with a moving external target.
• To develop a new displacement measurement method based on OFLD-POO dynamics.

Main Methods:

• Modeling of an OFLD-POO sensing system.
• Derivation of an analytical expression for the OFLD-POO sensing signal.
• Verification of the sensing model using Lang-Kobayashi equations.
• Experimental setup of an OFLD-POO system for displacement sensing.

Main Results:

• A new analytical expression for OFLD-POO sensing signal was derived.
• The proposed sensing model was validated against established laser dynamic equations.
• Experimental results confirmed the system's effectiveness for displacement measurement.

Conclusions:

• The OFLD-POO sensing system offers a promising approach for displacement measurement.
• The system achieves a large measurement range, high sensitivity, and high resolution.
• This research highlights the potential of OFLDs in advanced sensing applications.