Active-passive mode-locked oscillator generating nanosecond pulses

Synchronous amplification of subpicosecond pulses

“…This is the first instance in the literature of a synchronous amplifier. A gain of 4 was observed with the small signal gain being 100. The amplified pulse had an energy of 60 microjoules (BJ) and a duration of 12 PS.…”

“…(100) infrared pulse must be frequency doubled and the efficiency of conversion depends on the peak power and thus the pulse duration. As the pump pulse duration changes, the pump pulse bandwidth, divergence, alignment and energy will all change making the experiment practically impossible.…”

Active-passive mode-locked and mechanically Q-switched frequency tunable Nd: Glass laser

“…The shot-to-shot reproducibility of the Nd:glass lasers has been improved considerably by the combined active and passive mode-locking [5][6][7][8][9][10][11][12]. Theoretical investigations of the simultaneous active and passive mode-locking are found in refs.…”