This laser driver, ATLS12A216, is an electronic module that  has all the valuable and important, but often difficult to  achieve simultaneously, features: wide input and output  voltage range,  high output current capability,  high efficiency,     low output noise (but it has an output 4mVp-p ripple voltage  at 700kHz), wide modulation bandwidth, and small size. The  wide output voltage range, 0.2V_VPS to 0.8V_VPS,allows driving  one or multiple serial laser diodes at the same time,  for up to   12A well controlled current at high efficiency. The extremely  low noise between DC ~ 20kHz and low DC current drift make    it ideal for driving diode pumped single mode laser diodes to  achieve mode-hop-free and narrow optical wavelength drift,  thus, long coherent length. Because of high current, the laser  driver generates a large amount of heat, thus, a heat sink is   necessary for normal operation. The fully shielded case blocks  all the incoming and outgoing EMIs (Electro-Magnet  Interferences).    Therefore, this laser will not interfere other  surrounding electronics, nor will be interfered by them. The small package saves valuable PCB space in laser systems.