TY - JOUR

T1 - Impact of chaotic semiconductor laser output power on the time-delaysignature of chaos and random bit generation

AU - Xue, Chenpeng

AU - Wang, Xu

AU - Zheng, Likai

AU - Zhang, Haoyu

AU - Hong, Yanhua

AU - Zhang, Zuxing

PY - 2025/1/9

Y1 - 2025/1/9

N2 - We experimentally analyze the effect of the optical power on the time delay signature identification and the random bit generation in chaotic semiconductor laser with optical feedback.Due to the inevitable noise during the photoelectric detection and analog-digital conversion, the varying of output optical power would change the signal to noise ratio, then impact time delay signature identification and the random bit generation. Our results show that, when the optical power is less than -14 dBm, with the decreasing of the optical power, the actual identified timedelay signature degrades and the entropy of the chaotic signal increases. Moreover, the extracted random bit sequence with lower optical power is more easily pass through the randomness testing.

AB - We experimentally analyze the effect of the optical power on the time delay signature identification and the random bit generation in chaotic semiconductor laser with optical feedback.Due to the inevitable noise during the photoelectric detection and analog-digital conversion, the varying of output optical power would change the signal to noise ratio, then impact time delay signature identification and the random bit generation. Our results show that, when the optical power is less than -14 dBm, with the decreasing of the optical power, the actual identified timedelay signature degrades and the entropy of the chaotic signal increases. Moreover, the extracted random bit sequence with lower optical power is more easily pass through the randomness testing.

U2 - 10.1088/1674-1056/ada7dd

DO - 10.1088/1674-1056/ada7dd

M3 - Article

JO - Chinese Physics B

JF - Chinese Physics B

SN - 1674-1056

ER -