数值研究了一种获取宽带光学频率梳的方案.在该方案中，首先采用调制频率f_m=f₀/n（f₀为1 550 nm垂直腔面发射激光器中两正交偏振分量频率间隔，n为整数）的大调制信号电流调制一个1 550 nm垂直腔面发射激光器，使该1 550 nm垂直腔面发射激光器中的主振荡模式—Y偏振分量输出光学频率梳，而X偏振分量处于被抑制状态；进一步地，引入线偏振光注入，使激光器中两个偏振分量（光谱主峰比小于15 dB）均实现光学频率梳输出；再借助一个偏振片，将这两个偏振分量引导到该偏振片的透振方向实现光谱拼接，从而获取宽带光学频率梳.基于自旋反转模型，数值研究了由该方案产生的光学频率梳特性.仿真结果表明：在给定的参数条件下，一个自由运行1 550 nm垂直腔面发射激光器（阈值电流为2.6 mA）偏置在11.5 mA时，Y偏振分量占主导而X偏振分量被抑制（光谱主峰比大于30 dB）；在受到调制深度较大的电流调制作用下，该激光器只在Y偏振分量输出光学频率梳；引入线性偏振光注入后，通过调整线性偏振光的偏振方向，可使X、Y偏振分量同时实现光学频率梳输出；最后，利用一偏振片将X、Y偏振分量引导到该偏振片的透振方向实现光谱拼接，最终可获得一个带宽超过80 GHz的光学频率梳.

A scheme for generating broadband optical frequency comb was proposed and numerically simulated. For this scheme, a 1 550 nm vertical-cavity surface-emitting laser under a large signal current modulation with a modulation frequency of f_m=f₀/n (f₀ is the frequency interval of two orthogonal polarization components of a 1 550 nm vertical-cavity surface-emitting laser, n is an integer) can output an optical frequency comb in the dominant Y polarization component direction while the X polarization component is suppressed. By further introducing a linearly polarized optical injection, both the two polarization components (spectral main-peak ratio less than 15 dB) can output optical frequency combs. Finally, via a polarizer the two optical frequency combs with orthogonal polarization components can be decomposed by spectral splicing to obtain a broadband optical frequency comb. Based on the spin-flip model, the optical frequency comb performances of generated by this scheme is numerically investigated. The numerical results demonstrate that, when the bias current of a 1 550 nm vertical-cavity surface-emitting laser with a threshold current of 2.6 mA is set at 11.5 mA, the Y polarization component dominates while the X polarization component was suppressed, and the ratio of the main spectral peaks of the two polarization components is more than 30 dB. Under a current modulation with a large modulation index, only the Y polarization component of the laser can realize an optical frequency comb output. By further introducing a linearly polarized optical injection, both two polarization components can output optical frequency combs by adjusting the polarization direction of the linearly polarized light. Finally, a polarizer is used to guide the two polarization components to the transparent direction of the polarizer to achieve the spectral splicing, and then an optical frequency comb with a bandwidth more than 80 GHz can be obtained.