The Becker & Hickl BDS Series picosecond diode lasers combine small size with high power. The lasers come in industry-standard housings just 40 x 40 x 110 mm in size. Electronics is contained in the laser housing, the lasers are operated from a simple +12V wall-mounted power supply. The BDS-SM single-mode version has two internal repetition rates (20 MHz and 50 MHz) and a CW mode. Power is up to 5 mW in the pulsed mode and 50 mW in the CW mode. The pulse width is from 60 ps to 200 ps, depending on the wavelength version and the power. The lasers are available with free-beam output, with a permanently installed single-mode fibre, or with single-mode fibre couplers. The BDS-MM high-power multi-mode version delivers ps pulses at an average power up to 60 mW. It has two repetition rates, 50 MHz and 20 MHz. The BDS-MM version is available with a free-beam output or with a multi-mode fibre output. All BDS series lasers can be synchronised to an external clock source, have internal power stabilisation feedback, and fast on/off (modulation) capability.