DFB Lasers with Tilted Waveguide for Multi-Wavelength Generation |
| Journal |
Advanced Materials Research (Volume 31) |
| Volume |
Semiconductor Photonics: Nano-Structured Materials and Devices |
| Edited by |
S. J. CHUA, J. H. TENG, O. WADA, R. DE LA RUE and X. H. TANG |
| Pages |
36-38 |
| DOI |
10.4028/www.scientific.net/AMR.31.36 |
| Online since |
November, 2007 |
| Authors |
Lip Fah Chong,
Jing Hua Teng,
Ee Leong Lim,
Norman Soo Seng Ang,
J.R. Dong,
Soo Jin Chua
|
| Keywords |
Coupled Mode Theory, DFB Laser, Index Coupled DFB Laser, Multi-Wavelength, Newton-Raphson Method, Threshold Analysis, Tilted Waveguide |
| Abstract |
In this paper, we present the theoretical investigation of index-coupled distributed
feedback (DFB) laser with tilted single mode ridge waveguides. By tilting part of the ridge
waveguide in various degrees, DFB laser with manifold effective grating periods can be realized.
The structure is analyzed using couple mode theory in matrix form based on threshold analysis.
Important parameters of DFB laser like resonant frequency and threshold gains are obtained by
solving the eigen-equation. The results indicate not only that the lasing frequency is modulated by
the waveguide titling angle, but also large Gain Margin (GM) can be achieved at the threshold
condition which enhance the stable single mode operation in index-coupled DFB laser. |
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