Jitter dynamics of a gainswitched semiconductor laser under self-feedback and external optical injection
Jitter dynamics of a gainswitched semiconductor laser under self-feedback and external optical injection
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DOI：
10.1109/3.903076
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发表时间：
2001-02-01
影响因子：
2.5
通讯作者：
Saloma, CA
中科院分区：
文献类型：
--
作者：
Daza, MRH;Saloma, CA
研究了增益开关半导体激光器（LD）在强光注入作用下的抖动动态特性，这种强光注入是由外腔镜或另一个LD的多次反射引起的。实现了一种同时考虑自发辐射噪声和外部光学元件多次反射的数值技术。在任何时候，LD都表现出以固定主输出波长为中心的高斯形谱线轮廓的多纵模操作。我们分别考虑三个（强光注入条件：1）相干自反馈; 2）非相干自反馈;和3）相干，外部连续波（CW）光注入。非相干自反馈的结果在减少，由一个数量级，在强度和定时抖动（0.5 ps），同时保持平均峰值功率和脉冲宽度。眼图结果示出了至少90%的开口，这表示与在没有光学注入的情况下操作的相同LD相比改进了两倍。外部连续波注入条件只有在高注入时才接近非相干自反馈条件，相干自反馈对LD性能没有显著影响。
We investigate the jitter dynamics of a gainswitched laser diode (LD) under the influence of strong optical injection due either to multiple reflections from an external cavity mirror, or from another LD. A numerical technique that considers both the spontaneous emission noise and multiple reflections from external optical components is implemented, At all times, the LD exhibits multi-longitudinal mode operation with a Gaussian-shaped spectral line profile that is centered around a fixed dominant output wavelength. We separately consider three (strong optical injection conditions: 1) coherent self-feedback; 2) incoherent self-feedback; and 3) coherent, external continuous-wave (CW) optical injection. Incoherent self-feedback results in a reduction, by an order of magnitude, in both the intensity and timing jitter (0.5 ps), while maintaining the average peak power and pulsewidth. Eye pattern results show an opening of at least 90 %, which represents an improvement by a factor of two over the same LD that operates without optical injection. The external CW injection condition approaches that of incoherent self-feedback only at high external injection, Coherent self-feedback does not produce any significant change in the LD performance.