Wavelength and polarization effects in actively tunable thin film resonators for thermal drift compensation

Thin film resonators produce significant beam shifts of incident light based on incidence angle and wavelength dependent changes of the effective group propagation angle. We investigate these shifts in actively tunable resonators for thermal drift compensation in transparent free-space optical interconnect networks for future inter- and intra-chip applications. The effects of VCSEL wavelength variations, WDM tuning range, and polarization fluctuations on system performance are analyzed.