The linewidth of an externalcavitysemiconductorlaser(LD) is presented quantum-mechanically. The best feedback conditions are given for the suppression of LD linewidth.
本文用量子力学的方法求得了外腔半导体激光器（LD）的线宽，给出了抑制LD线宽的最佳反馈条件。
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The wide band wavelength tuning externalcavitysemiconductorlaser was theoretically and experimentally analyzed. The maximum tuning range and the continuous tuning condition were given.
The invention relates to an externalcavity which allows a semiconductorlaser array to output double wavelengths and belongs to the field of the semiconductor laser.