Numerical Analysis of Vertical Coupled-Cavity Lasers for Dual-Wavelength Emission

We present theoretical studies on the optical properties of coupled-cavity vertical-cavity surface-emitting lasers (CC-VCSEL). Optical field was numerically simulated in active resonator by effective frequency method in cylindrical coordinates. The variables separation method was used for 3D wave equation resolving. Longitudinal and transverse mode distributions were calculated with corresponding wavelengths. We conclude from these results, that in a AlGaAs/GaAs/InGaAs CC-VCSEL a two-frequency generation is possible, with the spectral interval between the two longitudinal modes varying from 0.08 to 50 nm, depending on the construction of the middle mirror of the device. This interval is limited by the Bragg mirrows refraction coefficient stopband, thermal effects, device manufacture precision. We also make some recommendations for the optimal CC-VCSEL design