Extremely long train of ultra short pulses from an actively mode-locked pulsed Nd: YAG laser

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Abstract

An actively mode-locked pulsed Nd:YAG laser with passive feedback control was used to obtain millisecond trains of ultra-short light pulses. The intracavity second harmonic generation in a crystal situated at a proper distance from the output mirror served as a negative feedback. The length of the train was limited by the length of the flash lamp pumping pulse.

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Cited by (11)

  • Optimal performances of a mode-locking technique: Theoretical and experimental investigations of the frequency-doubling nonlinear mirror

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    The frequency-doubling nonlinear mirror (FDNLM) mode-locker, originally proposed by Stankov consists of a nonlinear crystal coupled to a dichroic mirror. Its additional advantages over the aforementioned techniques are the following: it can provide passive negative as well as positive mode-locking and it can be applied over a wide spectral range from infrared to visible where many nonlinear crystals are available [3–7]. The performances of the FDNLM to generate mode-locked laser pulses have been demonstrated in many works, not only for continuous pulse-train lasers (CPT), (usually abbreviated by cw, not to be confused with continuous-wave lasers) but also for pulsed pulse-train lasers (PPT) [3,4,8–10].

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