制作了一种以光纤光栅作为外反馈的半导体激光器。光纤光栅用紫外曝光法制作,反射率为50%。器件在50mA注入电流时,出纤功率高于1mW,主边模抑制比为42dB。使用对光纤光栅施加应变和改变光栅温度的方法实现了输出激光波长的调谐,利用施加应变方法得到了2nm范围的输出波长变化。

An external cavity semiconductor laser configuration, which employs fiber grating as feedback is reported in this paper. The fiber grating is fabricated by UV light exposure, with reflectivity of 50%. At injection current of 50 mA, output is over 1 mW and the MSR is 42 dB. The laser wavelength is tuned by applying strain along the fiber grating and by heating the fiber grating. With the applying-strain method, the tuning range of 2 nm is obtained.