Development of such distributed feedback heterostructure lasers requires crystal growth on corrugated layers . 研制这种分布反馈双异质结构激光器要求在皱折层上生长出单晶层。
proof of distributed feedback was the tuning of the laser wavelength over 130°a by changing the grating period, and the absence of shift in wavelength with increasing excitation current. 存在分布反馈的证据是,改变光栅周期可使激光波长在130A范围内变化以及波长不随激发电流的增大而移动。
Ea - dfb : electricity absorb - distributed feedback 电吸收分布反馈