在三段电注入应变多量子阱分布反馈激光器中, 应用增益杠杆效应扩大了波长的可调谐范围。对其中两段加固定偏置直流电流, 另一段作为控制段(其长度为总腔长的0.33)。随着对控制段注入电流的增加, 发射波长会往长波方向移动。其波长连续可调谐范围(不含跳模)在1.538 μm波段可达0.82 nm。经过跳模后尚可连续调谐。

The wavelength tunable range was widened in a three electric section strained multi quantum well distributed feedback laser by using the gain lever effect. When the fixed bias currents are injected into the two sections, another section is the control section (its length is 0.33 of the all cavity length). The lasing wavelength becomes longer when the current of the control section is increased. The maximum continuous tuning range (without mode hopping) is 0.82 nm at 1.538 μm. It still can be continuously tuned after mode hopping.