Performance characteristics of buried facet quarter-wave shifted distributed feedback lasers |
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| Authors: | Twu Y Karlicek RF Wynn JD Green CA Roxlo CB Wang SJ Dutta NK |
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| Affiliation: | AT&T Bell Labs., Murray Hill, NJ, USA; |
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| Abstract: | The performance characteristics of quarter-wave shifted GaInAsP distributed feedback lasers emitting near 1.3 mu m are described. The quarter-wave shifted grating is fabricated on a substrate using the double-exposure holographic technique. The low reflectivity required for this quarter-wave shifted DFB laser is obtained using buried facets at both ends of the laser. The lasers have threshold current of 30 mA, quantum efficiency of 0.18 mW/mA/facet, bandwidth of 11.5 GHz at 10 mW and 10 dB chirp width of 2.5 AA under 40 mA modulation current at 5 Gbit/s.<> |
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