Wavelength Electronics Inc.’s QCL series quantum cascade laser drivers offer low-noise-control electronics that minimize linewidth, spectral drift and center wavelength jitter. The QCL1000 1-A driver produces 0.7 μA rms noise over a 100-kHz bandwidth. Designed as an OEM controller, it can be used in field-deployed systems or on a benchtop. It can be interfaced to a printed circuit board or via cables. Bandwidth is 2 or 3 MHz, with rise and fall times of 250 and 200 ns, respectively. It offers compliance voltage of up to 16 V, constant current mode, onboard set-point and limit controls, and dual supply operation at ±24 V. Patented circuitry is suitable for driving quantum cascade lasers where electronic noise, coupled through the laser, affects sensor measurements.