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    • 5. 发明授权
    • Low divergence laser diode
    • 低发散激光二极管
    • US5801403A
    • 1998-09-01
    • US832646
    • 1997-04-04
    • Xiaoguang He
    • Xiaoguang He
    • H01S5/10H01L33/00
    • H01S5/10H01S2301/18H01S5/1039
    • The cavity of a laser diode is made longer than that which would be dictated by consideration of maximizing the efficiency of the diode. The lateral divergence of the emitted light beam is decreased as the cavity length increases. The lower lateral divergence enables the emitted light beam being focused to produce a greater depth of field for coupling into an optical fiber. In another case, when the fiber size is fixed, lower lateral divergence enables the emitted light beam to being fed into a lower numerical aperture fiber, or enables the beam divergence after fiber to be lower.
    • 激光二极管的空腔比通过考虑最大化二极管的效率所规定的更长。 发射光束的横向发散随着空腔长度的增加而减小。 较低的横向发散使得发射的光束被聚焦以产生用于耦合到光纤中的更大的景深。 在另一种情况下,当光纤尺寸固定时,较低的横向发散使发射的光束能够馈送到较低的数值孔径光纤中,或使得光纤之后的光束发散较低。