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arXiv 2402.11246physics.optics
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光子晶体表面发射激光器线宽-功率乘积的理论

Theory of the linewidth-power product of photonic-crystal surface-emitting lasers

Hans Wenzel, Eduard Kuhn, Ben King, Paul Crump, Mindaugas Radziunas

AI总结:

本文提出光子晶体表面发射激光器线宽理论,通过耦合波方程和谱问题分析,推导出线宽-功率乘积的计算方法,并验证了实验结果。

摘要:

本文提出了光子晶体表面发射激光器(PCSELs)内在(洛伦兹型)线宽的一般理论。自发辐射的影响通过经典 Langevin 力进入波方程中。耦合波方程的解,描述了光子晶体平面内四种基本波的传播,被展开为关联谱问题(即激光模式)的解。给出了光子数、自发辐射进入激光模式的速率、Petermann 因子和有效 Henry 因子的表达式,这些因子出现在线宽的一般公式中。该理论框架被应用于计算空气孔和全半导体 PCSELs 的线宽-功率乘积。对于输出功率在瓦特范围内的情况,得到 kHz 级别的内在线宽,与最近的实验结果一致。

英文摘要:

A general theory for the intrinsic (Lorentzian) linewidth of photonic--crystal surface--emitting lasers (PCSELs) is presented. The effect of spontaneous emission is modeled by a classical Langevin force entering the equation for the slowly varying waves. The solution of the coupled--wave equations, describing the propagation of four basic waves within the plane of the photonic crystal, is expanded in terms of the solutions of the associated spectral problem, i.e. the laser modes. Expressions are given for photon number, rate of spontaneous emission into the laser mode, Petermann factor and effective Henry factor entering the general formula for the linewidth. The theoretical framework is applied to the calculation of the linewidth--power product of air--hole and all--semiconductor PCSELs. For output powers in the Watt range, intrinsic linewidths in the kHz range are obtained in agreement with recent experimental results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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