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    • 3. 发明授权
    • Distributed feedback laser for isolator-free operation
    • 分布式反馈激光器,用于无隔离器操作
    • US06891870B2
    • 2005-05-10
    • US10037461
    • 2001-11-09
    • Richard T. SaharaAngela Hohl-AbichedidHanh Lu
    • Richard T. SaharaAngela Hohl-AbichedidHanh Lu
    • H01S5/12H01S5/34H01S5/343H01S3/08
    • B82Y20/00H01S5/1228H01S5/3406H01S5/34373
    • An integrated semiconductor device comprising a laser on a substrate, the laser having an active layer and a current-induced grating, such as a current-injection complex-coupled grating, within a laser cavity producing a single-mode output light signal at high data rates (>622 Mb/sec) in isolator-free operation. The grating has a coupling strength product κL greater than 3, where κ is the coupling coefficient and L is the length of the laser cavity. In certain embodiments, the laser is a distributed feedback (DFB) laser that emits light at a wavelength of about 1.5 μm. The strong current-induced grating prevents mode hopping between multiple degenerate Bragg modes. The laser is also characterized by excellent immunity from optical feedback, and can be operated without an isolator at high data rates.
    • 一种集成半导体器件,其包括在衬底上的激光器,所述激光器具有激活腔内的有源层和电流感应光栅,例如电流注入复耦合光栅,产生高数据下的单模输出光信号 (> 622 Mb / sec)无隔离器操作。 光栅具有大于3的耦合强度乘积kappaL,其中kapp是耦合系数,L是激光腔的长度。 在某些实施例中,激光是发射波长约1.5μm的光的分布反馈(DFB)激光器。 强电流感应光栅防止多个退化布拉格模式之间的模式跳变。 激光器的特征还在于光反馈的优异抗扰度,并且可以在高数据速率下无需隔离器进行操作。