Switchable pulses generation in passively Q-switched multilongitudinal-mode microchip laser

✍ Scribed by J. Dong; A. Shirakawa; K. Ueda

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 850 KB
• Volume: 4
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.200610077

✦ Synopsis

Periodical switching laser pulses with nanosecond pulse
width and several kilowatts peak power from wide-separated
multilongitudinal-mode oscillation were observed experimentally in
laser-diode pumped passively Q-switched Yb:YAG microchip laser
with Cr^4+^:YAG as saturable absorber. Pulses from different
longitudinal modes oscillate alternatively. Periodical pulses
oscillation dynamics induced by spatial hole burning effect and
mode competition was investigated numerically by the evolution of
the inversion population of different modes and the bleaching and
recovery of the inversion population of the saturable absorber.
The numerical simulations of switchable periodical pulsation of
multilongitudinal-mode passively Q-switched Yb:YAG/Cr^4+^:YAG
microchip lasers are in good agreement with experimental results
and confirmed that such pulsations are an intrinsic property in
passively Q-switched Yb:YAG/Cr^4+^:YAG microchip lasers.