The VCSEL based array optical transmitter (ATx) development towards 120 Gbps link for collider detector: development update
A compact radiation tolerant array optical transmitter module (ATx) is developed to provide data transmission up to 10Gbps per channel with 12 parallel channels for collider detector applications. The ATx integrates a Vertical Cavity Surface Emitting Laser (VCSEL) array and driver circuitry for electrical to optical conversion, an edge warp substrate for the electrical interface and a micro lens array for the optical interface. This paper reports the continuing development of the ATx custom package. A simple, high accuracy and reliable active alignment method for the optical coupling is introduced. The radiation resistance of the optoelectronic components is evaluated and the inclusion of a custom designed array driver is discussed.