The Model 9016 Modular Controller expands on Newport's modular laser diode controller concept to meet the higher channel densities found in Dense WDM (DWDM) applications and 2-D VCSEL arrays where all the lasers have similar electrical configurations. The 16 bays accept Combo Laser Diode Driver (LDD)/ Temperature Controller (TEC) modules. The Combo LDD/TEC modules are designed for use in communication applications and have an internal function generator for testing systems. The user only needs to program the frequency, Imax, and Imin to modulate the laser diode output. Triangle, sine or square (50% duty cycle) waveforms are available from 200 Hz -- 300 kHz. This range of frequencies meets today’s low frequency single-tone and high data rate test requirements for datacom and telecom. The mainframe automatically detects which module is installed in each bay and displays the system configuration on a large LCD screen. A sophisticated processor provides enhanced system control and data collection capabilities. GPIB/IEEE-488 and RS-232 interfaces are included with the Model 8016 for complete remote control and data collection. LabVIEW drivers are supplied with each 8016 mainframe. Automated testing and device evaluation are easily implemented using Newport's extensive library of LabVIEW commands.