电控宽带连续调谐外腔半导体激光器

An Externalcavity Semiconductor Laser with aWide Piezoelectric Tuning Range

介绍了一种电控调谐的外腔半导体激光器，并对其连续调谐特性进行了理论和实验分析。压电陶瓷（ＰＺＴ）（双晶片）的电扫描角度可达１°，采用适当的外腔结构，靠ＰＺＴ可同时改变外腔腔长和光栅衍射角，实现输出波长的调谐。该器件调谐范围最大可达１５ｎｍ。

In this paper, a new electrical tuning method for an external cavity semiconductor laser is presented. The continuous tuning condition is theoretically and experimentally analyzed. A single PZT (Bimorph) is used to change both the cavity length and the grating angle. The cavity structure is so designed that the continuous tuning condition can be satisfied. The scanning angle of the bimorph is about 1°. As wide as 15 nm a tuning range and a 50GHz continuous range (without mode hopping) are obtained.