Oscillation characteristics improvement of a Vertical Cavity Surface Emitting Laser and consideration to its application

在目前的工作中，我们测试了垂直腔面发射激光器（VCSEL）在磁场中的振荡波长漂移，因为我们预计VCSEL会显示出较短的波长侧移。我们还展示了一种新的方法产生的物理随机数，通过一个二极管激光器，具有极宽的频带频率噪声分布。激光频率的波动影响通过光学频率λ的透射光的强度，随后作为随机波动检测。这使我们能够同时生成8个随机比特流，因为8位模数转换器（ADC）对8位二进制数进行了并行处理。最后，我们以40 Gb/s的速率产生物理随机数。

In the present work, we tested the oscillation wavelength shift of a vertical-cavity surface-emitting laser (VCSEL) in a magnetic field, because we expected that the VCSEL would show a shorter wavelength side shift. We also demonstrated a novel method of generating physical random numbers, by means of a diode laser that has an extremely wide-band frequency-noise profile. Fluctuations in the laser frequency affect the intensity of the light transmitted through the optical frequency discriminator, detected thereafter, as random fluctuations. This allows us to simultaneously generate 8 random bit streams, due to the parallel processing of 8-digit binary numbers sampled by an 8-bit analog-to-digital converter (ADC). Finally, we generated physical random numbers at a rate of 40Gb/s.