关键词: 光电子学与激光技术, 半导体激光器, 扩散方程, 电导数, 可靠性, 数据降噪

Abstract:

    According to the denoising theory based on the nonlinear diffusion equation, the nonlinear diffusion equation was applied to denoising of electrical derivative data of semiconductor laser diode (LD). Comparing with the denoising method based on mean value filtering, the experiment results indicated that this denoising method can reduce the noise in electrical derivative data of LD more effectively, and moreover the dip height of the electrical derivative curve at the threshold current can be preserved. The errors in parameters obtained from the measured electrical derivative curve were reduced too. The quality and reliability of LD can be estimated effectively using parameters from the measured electrical derivative curve after being denoised.

Key words: optoelectronics and laser, semiconductor laser diode, diffusion equation, electrical derivative, reliability, data denoising