Related Experiment Video
Updated: May 16, 2026
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Self-injected semiconductor distributed feedback lasers for frequency chirp stabilization
Khalil Kechaou1, Frédéric Grillot, Jean-Guy Provost
1Institut Mines-Telecom, Telecom ParisTech, CNRS LTCI, 46 rue Barrault, 75634 Paris Cedex, France. khalil.kechaou@telecom-paristech.fr
Optics Express
|November 29, 2012
Summary
External control stabilizes chirp in semiconductor lasers, enhancing optical communication performance. This method significantly reduces the chirp-to-power ratio, improving data transmission quality.
Area of Science:
- Photonics
- Optical Communications
- Semiconductor Lasers
Background:
- Semiconductor distributed feedback (DFB) lasers are crucial for optical communications.
- Direct modulation of DFB lasers is limited by frequency chirp, affecting signal quality.
Purpose of the Study:
- To demonstrate chirp-to-power ratio (CPR) stabilization in DFB lasers using external control.
- To investigate methods for improving transmission performance in optical telecommunication systems.
Main Methods:
- Experimental demonstration of external optical feedback control.
- Numerical simulations using the transfer matrix method.
- Analysis of chirp-to-power ratio under various modulation frequencies.
Main Results:
- External control significantly reduces CPR from 650 MHz/mW to 65 MHz/mW in the adiabatic regime.
- CPR stabilization is achieved over a wide range of modulation frequencies.
- Numerical simulations confirm experimental findings and suggest cavity design optimization.
Conclusions:
- External control laser operation is an effective strategy for CPR stabilization.
- Optimized cavity design and external control can further enhance CPR performance.
- This approach offers significant improvements for optical telecommunication systems.
