The dynamic linewidth enhancement factor, (alpha) , and damping rate, (Gamma) , for distributed feedback (DFB) lasers are obtained at various bias levels by measuring the frequency modulation and amplitude modulation indices of the lasers simultaneously. The (alpha) -value of a DFB lasers is generally reduced with increasing output power except at low bias, and the (Gamma) -value typically increases with output power. The measured results show that ninety percent of the 1.3-micrometers capped-mesa buried heterostructure DFB lasers have (alpha) -values in the range 4 to 7 and (Gamma) -values below 4 X 1010 s-1. The 1.3-micrometers lasers have smaller damping rates than the 1.5- micrometers lasers of the same DFB laser structure. Compared with buried heterostructure DFB lasers, multiquantum well (MQW) DFB lasers exhibit a much smaller (alpha) -value and a larger damping rate. For both unstrained and strained 1.5-micrometers MQW-DFB lasers, (alpha) -values as low as 1.5 can be easily realized for these lasers at high output power (>= 10 mW).
Measurements of dynamic linewidth enhancement factor and damping rate for distributed-feedback lasers
Sources and Detectors for Fiber Communications ; 1992 ; Boston,MA,United States
Proc. SPIE ; 1788
1993-02-16
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Linewidth enhancement factor of quantumdot lasers
British Library Online Contents | 2005
|Narrow-linewidth 1.5μm quantum dot distributed feedback lasers [9767-25]
British Library Conference Proceedings | 2016
High Power and Narrow Linewidth 1.3 m Distributed Feedback Lasers
British Library Conference Proceedings | 1997
|Beam Quality and Linewidth Enhancement Factor of Ridge-Waveguide Tapered Diode Lasers
British Library Conference Proceedings | 2002
|