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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Mixed external cavity mode dynamics in a semiconductor laser.

David W Sukow, Michael C Hegg, Jennifer L Wright

|November 17, 2007

Summary

Researchers observed new mixed-mode laser dynamics with two delayed optical feedbacks. These complex states combine external cavity modes, identified by specific bifurcation sequences.

Area of Science:

Nonlinear dynamics
Laser physics
Optical engineering

Background:

Diode lasers are fundamental in optical communications and sensing.
Understanding complex dynamics in lasers is crucial for device stability and performance.
The Lang-Kobayashi model describes single delayed feedback effects on laser dynamics.

Purpose of the Study:

To experimentally and numerically investigate novel mixed-mode dynamic states in a diode laser.
To analyze these states within the context of established laser dynamics models.
To characterize the bifurcation sequences leading to these complex dynamic states.

Main Methods:

Experimental setup involving a diode laser with two independent delayed optical feedbacks.
Numerical simulations based on extended Lang-Kobayashi rate equations.

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Bifurcation analysis to identify and characterize dynamic states and transitions.

Main Results:

Observation of novel mixed-mode dynamic states not previously reported.
Experimental and numerical evidence of characteristic bifurcation sequences (Hopf followed by quasi-periodic).
Confirmation that these states are combinations of two distinct external cavity modes.

Conclusions:

Mixed-mode dynamics in diode lasers with dual delayed feedback are experimentally achievable.
The observed dynamics validate theoretical predictions for complex laser behavior.
These findings offer insights into controlling and utilizing complex laser states.