摘要
VCSEL激光器特性仿真的数学建模对光领域的发展具有重要意义。传统方法主要对VCSEL激光器的结构进行分析,忽略了特性,存在仿真数学建模准确性差的问题,为此提出了基于VCSEL激光器特性仿真的数学建模方法。利用注入速率和复合速率构建激光器有源区载子流的速率方程,得到载子流比率,根据激光器的自发和非辐射复合速率等条件对VCSEL激光器的复合速率进行分析,描述激光器光子自然衰减的过程,利用光增益系数计算激光器光子浓度的速率方程,将两个方程相结合可以得到VCSEL激光器的速率方程,然后对VCSEL激光器的阈值条件进行分析,利用VCSEL激光器的外部驱动电流对其光功率进行分析,并根据温度计算激光器热偏置电流的变化函数,得到VCSEL激光器的瞬时功率,分析激光器的信号响应,最终实现VCSEL激光器特性仿真的数学建模。实验结果表明,本文方法得到的激光器光束质量较好、所输出的光功率较大,并且激光器建模的准确性较好。
The mathematical modeling of VCSEL laser characteristic simulation is of great significance to the development of the optical field. The traditional method mainly analyzes the structure of the VCSEL laser,neglecting the characteristics of VCSEL lasers. There is a problem that the accuracy of simulation mathematical modeling is poor. Regarding the issue above,a mathematical modeling method for VCSEL laser characteristic simulation based on optical communication method is proposed. Using the electron injection rate and recombination rate to calculate the rate equation of the carrier region of the laser active region,the carrier flow ratio is obtained,and the recombination rate of the VCSEL laser is analyzed according to the conditions of the spontaneous and non-radiative recombination rate of the laser,and the laser photon is described. The process of natural attenuation,using the optical gain coefficient to calculate the rate equation of the laser photon concentration,the two equations can be combined to obtain the rate equation of the VCSEL laser. The threshold conditions of the VCSEL laser are analyzed. Based on this,the external driving current of the VCSEL laser is used to analyze its optical power,and the variation function of the laser thermal bias current is calculated according to the temperature to obtain the instantaneous power of the VCSEL laser. The signal response of the laser ultimately results in mathematical modeling of the VCSEL laser characteristic simulation. The experimental results show that the proposed laser beam quality is better,the output optical power is larger,and the laser modeling accuracy is better.
引文
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