An external-cavity dumped nanosecond (ns) ultra-broad-area laser diode (UBALD) at around 966 nm with high pulse energy is demonstrated. A 1 mm UBALD is used to produce high output power and high pulse energy. A Pockels cell (PC) combines with two polarization beam splitters (PBSs) and is employed to cavity-dump a UBALD operating at 10 kHz repetition rate. At a pump current of 23 A, 11.4 ns pulses with a maximum pulse energy of ≈1.9 µJ and a maximum peak power of ≈166 W are achieved. The beam quality factor is measured to be =19.5 in the slow axis direction and =2.17 in the fast axis direction. Moreover, maximum average output power stability is confirmed, with a power fluctuation of less than 0.8% rms over 60 min. To the best of our knowledge, this is the first high-energy external-cavity dumped demonstration from an UBALD.
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An external-cavity dumped nanosecond (ns) ultra-broad-area laser diode (UBALD) at around 966 nm with high pulse energy is demonstrated. A 1 mm UBALD is used to produce high output power and high pulse energy. A Pockels cell (PC) combines with two polarization beam splitters (PBSs) and is employed to cavity-dump a UBALD operating at 10 kHz repetition rate.
View Article and Find Full Text PDFA single transverse mode high-pulse-energy vertical-external-cavity surface-emitting laser (VECSEL) was developed. The GaSb-based VECSEL emits at a wavelength of 2.04 µm with a peak power exceeding 500 W while maintaining good beam quality.
View Article and Find Full Text PDFFrequency-modulated cavity-dumped Nd-doped fiber laser.
Opt Lett
March 1991
Polaroid Corporation, 38 Henry Street, Cambridge, Massachusetts 02139, USA.
A cw-pumped Nd-doped single-mode double-clad fiber laser coiled around a resonant piezoelectric ceramic ring and coupled to an empty external cavity with strong feedback is described. Intensity laser pulses with durations in the 1-2-micros range are observed as the pump power or the ring drive voltage is increased, yielding peak powers as much as 25 times greater than average powers. The effect is attributed to strong phase modulation of the fiber laser by the piezoelectric ring, which induces FM laser oscillation.
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