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http://dx.doi.org/10.3807/KJOP.2003.14.5.521

Single mode yield analysis of complex-coupled DFB lasers above threshold for various coupling coefficient ratios and facet reflectivity combinations  

김부균 (숭실대학교 정보통신전자공학부)
김상택 (숭실대학교 정보통신전자공학부)
전재두 (숭실대학교 정보통신전자공학부)
Publication Information
Korean Journal of Optics and Photonics / v.14, no.5, 2003 , pp. 521-529 More about this Journal
Abstract
For complex-coupled (CC) DFB lasers, we found that there might be little correlation between the single mode yields at threshold and above threshold. At threshold, the single mode yield considering f number of in-phase (IP) CC DFB lasers is the same as that of anti-phase (AP) CC DFB lasers. However, the single mode yield as a function of injection current above threshold of IP CC DFB lasers is much different from that of AP CC DFB lasers. In the case of IP CC DFB lasers, the single mode yield increases as the coupling coefficient ratio (CR) increases, while, in the case of AP CC DFB lasers, the single mode yield decreases rapidly regardless of CR as the injection current increases. In the case of AR-HR combinations, the effect of AR ref1ectivity on the single mode yield increases as the coupling strength decreases. As the coupling strength decreases, the CR at which the increase rate of the single mode yield starts to decrease, increases, and the maximum single mode yield increases. Single mode yields of AR-HR and AR-AR combinations are larger than those of AR-CL and CL-CL combinations.
Keywords
complex-coupled DFB lasers; single mode yield; coupling coefficient ratio; facet reflectivity combinations;
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