Analysis of TE/TM mode selectivity in DFB lasers with a phase-shift region
Journal Article
·
· IEEE Photonics Technol. Lett.; (United States)
In phase-shift distributed feedback (DFB) lasers, there is limited suppression of the TM mode despite extremely large submode suppressibility. The authors analyze the TE/TM mode selectivity of a DFB laser structure with a nonuniform waveguide region as the phase shifter. Calculations of the threshold gain difference between the TE and TM modes are performed using the effective index method and the coupled-wave theory. It is found that the TM mode suppressibility can be doubled by optimizing the dimensions of the phase-shift region. The TM mode problem will be overcome with this structure.
- Research Organization:
- Electron Device Engineering Lab., Toshiba Corp., Shinsugitacho 8, Isogo-ku, Yokohama (JP)
- OSTI ID:
- 6218023
- Journal Information:
- IEEE Photonics Technol. Lett.; (United States), Journal Name: IEEE Photonics Technol. Lett.; (United States) Vol. 1:1; ISSN IPTLE
- Country of Publication:
- United States
- Language:
- English
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