Optical resonance in a semiconductor laser is a major limitation in high speed data communications, resulting in bit error rate degradation and requiring additional power consuming error-correction circuits to counter these effects. In this work, we report the microwave bandwidth measurement of a vertical cavity transistor laser with an oxide-confined aperture of 4.7 × 5.4 μm2 and demonstrate a 3 dB bandwidth of 11 GHz resonance-free optical response via base-current or collector-voltage modulation. The emission spectra exhibit single-mode operation around 970 nm with a narrow linewidth of Δλ ∼ 0.23 A (cavity Q of 42 216). The resonance-free optical response is explained by the absence of carrier “accumulating” due to the fast base electron-hole recombination lifetimes and a gradient in the minority carrier charge in the transistor active mode.

中文翻译：

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垂直腔晶体管激光器的无共振光学响应

半导体激光器中的光谐振是高速数据通信的主要限制，导致误码率下降并需要额外的功耗纠错电路来抵消这些影响。在这项工作中，我们报告了具有 4.7 × 5.4 μm2 氧化物限制孔径的垂直腔晶体管激光器的微波带宽测量，并通过基极电流或集电极电压调制展示了 11 GHz 无谐振光学响应的​​ 3 dB 带宽. 发射光谱在 970 nm 附近表现出单模操作，窄线宽 Δλ ∼ 0.23 A（腔 Q 为 42 216）。由于基极电子-空穴复合寿命快以及晶体管有源模式中少数载流子电荷的梯度，没有载流子“积累”可以解释无共振光学响应。