Abstract
A numerical model for steady state analysis and analytical expressions for the AM and FM modulation responses of DFB lasers are presented. The small signal modulation responses of 3 phase shift (PS) DFB is investigated. A new method(Vector-Newton method) to obtain multiple-longitudinal-mode of DFB lasers is developed. It is demonstrated that this method is suitable for obtaining multiple-solution of high nonlinear equations. Longitudinal photon density distribution and multiple-longitudinal-mode of 3PS-DFB and simple-DFB lasers are analyzed. The results show that modulation response characteristics of 3PS-DFB laser is as good as that of DFB, and PS can weaken the longitudinal spatial hole-burning(LHSB) effect and is in favor of single longitudinal model operating of lasers.
| Original language | English |
|---|---|
| Pages (from-to) | 935-940 |
| Number of pages | 6 |
| Journal | Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors |
| Volume | 23 |
| Issue number | 9 |
| Publication status | Published - Sept 2002 |
| Externally published | Yes |
Keywords
- DFB
- LHSB
- Modulation response
- Phase shift
- Single mode
- Vector