  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.
