A model for the CMS tracker analog optical link

A model of the CMS-tracker analog optical link has been developed based on experimental and theoretical data as well as on the projected performance of the final link components. This model includes a monte-carlo module capable of simulating the effects of component tolerances on system characteristics. Using this model it is possible to predict the signal-to-noise and gain performance of various link configurations. The results indicate that the final version of the analog optical link will satisfy the system specifications. In particular they confirm that the spread of system-gain caused by component tolerances can be successfully compensated for by introducing a laser driver with switchable gain.