Open AccessEffects of nonlinear phase in cascaded mode-locked Nd:YVO4 laser
Author(s) -
Shou-Tai Lin,
Chunhui Huang
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.000504
Subject(s) - optics , materials science , mode locking , laser , pulse duration , pulse compression , bandwidth (computing) , pulse width modulation , diode , optoelectronics , power (physics) , physics , telecommunications , radar , quantum mechanics , computer science
A diode-pumped mode-locked Nd:YVO 4 laser via positive cascaded second-order Kerr lens using periodically poled MgO:LN at 1064 nm was reported. Mode-locking performances including output power, bandwidth, pulse duration, and time-bandwidth product were studied under different phase-mismatched conditions. The induced nonlinear phase combined with soft aperture effect yield a stable mode-locked operation in a wide phase-mismatched range (-8π < ∆kL < -π). Additionally, the mode-locking bandwidth was broadened by self-phase modulation and the time-bandwidth product was increased to be more than twice the ideal product for a sech 2 pulse shape. Under 11 W diode pump power, the measured average power, pulse repetition rate and pulse duration are 1.3 W, 186 MHz and 2.8 ps, respectively.