PicoQuant GmbH has launched the PDL 800-D picosecond diode laser driver for pulsed and CW operation. It is based on the technology of the PDL 800-B model, enabling it to control the company’s pulsed laser diode heads and LEDs, which cover the wavelength range from 260 to 1550 nm. The PDL 800-D includes 16 user-selectable repetition rates between 31.25 kHz and 80 MHz that are based on two low-jitter internal quartz oscillators, along with a frequency divider. It can be used for CW operation with the dual-mode laser heads of the LDH-D series. Applications include time-resolved fluorescence spectroscopy.