Accession Number:

ADA341567

Title:

Mechanism and Optimum Demodulation Scheme for Frequency-Modulated Feedback Sustained Pulsations in Laser Diodes

Descriptive Note:

Final rept. Mar 96-Sep 97

Corporate Author:

ROCHESTER INST OF TECH NY

Personal Author(s):

Report Date:

1998-03-01

Pagination or Media Count:

35.0

Abstract:

The operation regimes and dynamic properties of semiconductor laser diodes are significantly affected by external feedback. Investigation of the dynamics of Self-Sustained Pulsation SSP in the semiconductor laser diodes with optoelectronic feedback is presented. The Laser Diode LD is assumed to be a noiseless two section Fabry-Perot laser diode with linear gain in both sections. The feedback is assumed to consist of a photodetector and wide band and band pass microwave amplifier. For a certain range of the laser diode and feedback parameters the system undergoes high frequency about 1 GHz oscillations resulting from structural instability in system dynamics. Frequency, amplitude and other parameters of Self-Sustained Pulsation are electrically tunable. The system dynamics are investigated from the standpoint of stability analysis as well as direct numerical simulation. The stability analysis performed shows that for certain laser diode and feedback operating parameters, the feedback laser diode system exhibits an instability which results in Self-Sustained Pulsation.

Subject Categories:

  • Lasers and Masers
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE