Abstract
This paper studies dynamical behaviors and noise properties of semiconductor lasers with optical feedback from an interferometer, i.e., two external cavities. Bifurcation diagrams versus external-cavity length and reflectivity reveal the existence of stable regions for fixed states and limit cycles. The steady-state analysis for a laser diode with two external feedbacks is performed, which shows that oscillation modes are locked at minimum excess gain modes. Oscillation frequencies of limit cycles show discrete transitions with the variation of ratios between two external-cavity lengths and reflectivities. It is proposed that such a model might be applied to stabilization of the feedback-induced chaos in external-cavity semiconductor lasers since the stable region is quite robust for wide parameter ranges. Intensity and phase noises are examined and the results indicate that the low-frequency relative intensity noise level and the linewidth can be greatly improved when the laser output is a fixed state or a limit cycle.
| Original language | English |
|---|---|
| Pages (from-to) | 1163-1169 |
| Number of pages | 7 |
| Journal | IEEE Journal of Quantum Electronics |
| Volume | 33 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 1997 |
Funding
Manuscript received July 8, 1996; revised March 17, 1997. This work was supported by the Tokai Foundation for Technology. Y. Liu was with the Graduate School of Electronic Science and Technology, Shizuoka University, Hamamatsu 432, Japan. He is now with ATR Adaptive Communications Research Laboratories, Kyoto 619-02, Japan. J. Ohtsubo is with the Faculty of Engineering, Shizuoka University, Hamamatsu 432, Japan. Publisher Item Identifier S 0018-9197(97)04714-3.
Keywords
- Chaos
- Interferometer
- Optical feedback
- Semiconductor laser