Kim B G, Garmire E
Appl Opt. 1992 Aug 20;31(24):5099-101. doi: 10.1364/AO.31.005099.
We discuss the wavelength for maximum reflectivity of a Bragg reflector that has both index and absorption modulation. We show there that the blue shift away from the Bragg wavelength can be no larger than that given by the wavelength of maximum coupling, which we derive analytically. For gratings with fewer layers, the blue shift will be smaller than this maximum value. In typical semiconductor Bragg reflectors, this shift may be as much as 32 nm.
我们讨论了具有折射率和吸收调制的布拉格反射器的最大反射率波长。我们在那里表明，偏离布拉格波长的蓝移不会大于由最大耦合波长给出的值，我们通过解析得出了该值。对于层数较少的光栅，蓝移将小于此最大值。在典型的半导体布拉格反射器中，这种偏移可能高达32纳米。
