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    • 35. 发明授权
    • Semiconductor laser
    • 半导体激光器
    • US4797891A
    • 1989-01-10
    • US941842
    • 1986-12-15
    • Kazuhisa UomiMisuzu YoshizawaYuichi OnoNaoki ChinoneTakashi Kajimura
    • Kazuhisa UomiMisuzu YoshizawaYuichi OnoNaoki ChinoneTakashi Kajimura
    • H01S5/00H01S5/042H01S5/06H01S5/062H01S5/40H01S3/19
    • H01S5/4031H01S5/06243H01S5/4075
    • The present invention relates to phased-array semiconductor lasers having a radiation angle turnable by oscillating independently and stably between the fundamental supermode and the higher order supermode and switching the radiation angles by utilizing the property that their radiation angles are different.Optical switching and optical scanning, that have been difficult in the prior art, can be made more easily by use of a semiconductor laser having a turnable radiation angle.The objection of the present invention can be accomplished by disposing separate electrodes at the emission stripes and at the gap between the stripes in the phased-array semiconductor laser.Further, the present invention may be accomplished by dividing at least one stripe electrode in order to form electrode regions. When the current is applied to all the electrodes, oscillation occurs in the highest order mode and the beam is emitted in another direction. When the current is applied to only the electrode exclusive of the electrode regions, oscillation occurs in the fundamental mode and the beam is emitted in a direction vertical to a facet.Moreover, the present invention may be accomplished by disposing electrodes outside the stripe regions of the phased-array semiconductor laser so that oscillation occurs in the fundamental supermode when the electric field is applied to the electrodes and in the higher order mode when the electric field is not applied.
    • 本发明涉及通过利用其辐射角不同的性质,通过在基本超模和高阶超模之间独立且稳定地振荡而切换辐射角的相位阵列半导体激光器。 通过使用具有可转动的辐射角的半导体激光器,可以更容易地使现有技术中难以进行的光学切换和光学扫描。 本发明的反对可以通过在相控阵半导体激光器中的发射条和条之间的间隙设置分开的电极来实现。 此外,本发明可以通过划分至少一个条状电极来形成电极区域来实现。 当电流施加到所有电极时,在最高阶模式下发生振荡,并且光束在另一个方向上发射。 当只将电流施加到不包括电极区域的电极时,基本模式发生振荡,并且在垂直于小面的方向上发射光束。 此外,本发明可以通过将电极设置在相控阵半导体激光器的条纹区域之外来实现,使得当电场施加到电极时在基本超模中发生振荡,并且当电场为 没有申请。