写出用lumerical脚本语言计算波导光限制因子的程序

以下是一个简单的Lumerical脚本，可用于计算波导光限制因子：

# 设置仿真参数
central_wavelength = 1550e-9  # 中心波长
n_eff = 2.5  # 有效折射率
wg_width = 500e-9  # 波导宽度
wg_height = 220e-9  # 波导高度

# 定义波导
wg = fdtd.addrect()
wg['name'] = 'waveguide'
wg['x span'] = wg_width
wg['y span'] = wg_height
wg['z span'] = fdtd.getglobal('simulation time')
wg['x'] = -wg_width / 2
wg['y'] = 0
wg['z'] = 0
wg['material'] = 'silicon'

# 定义光源
source = fdtd.addplane()
source['name'] = 'source'
source['x span'] = fdtd.getglobal('simulation region x span')
source['y span'] = fdtd.getglobal('simulation region y span')
source['z'] = 0
source['wavelength start'] = central_wavelength
source['wavelength stop'] = central_wavelength
source['polarization angle'] = 0
source['angle theta'] = 0
source['angle phi'] = 0

# 定义探测器
detector = fdtd.addpower()
detector['name'] = 'detector'
detector['monitor type'] = 'linear x'
detector['x span'] = fdtd.getglobal('simulation region x span')
detector['y'] = 0
detector['z'] = fdtd.getglobal('simulation time')
detector['wavelength start'] = central_wavelength
detector['wavelength stop'] = central_wavelength

# 运行仿真
fdtd.run()

# 计算波导光限制因子
F = detector.getpower() / source.getpower() * (central_wavelength / (2 * n_eff * wg_width))
print('波导光限制因子:', F)

该脚本创建了一个矩形波导、一个光源和一个探测器，并运行了FDTD仿真。在仿真结束后，脚本从探测器和光源的监视器数据中计算波导光限制因子，并输出结果。