Passively mode-locked Tm,Ho:YAG laser at 2 microm based on saturable absorption of intersubband transitions in quantum wells.
We report the first demonstration of a solid state laser passively mode-locked through the saturable absorption of short-wavelength intersubband transitions in doped quantum wells: a continuous wave Ti:sapphire laser end-pumped Tm,Ho:YAG laser at the center wavelength of 2.091 mum utilizing intersubband transitions in narrow In(0.53)Ga(0.47)As/Al(0.53)As(0.47)Sb quantum wells. Stable passive mode-locking operation with maximum average output power of up to 160 mW for 2.9 W of the absorbed pump power could last for hours without external interruption and a mode-locked pulse with duration of 60 ps at repetition rate of 106.5 MHz was generated.
Yang
Kejian
K
Department of Physics and Center of Applied Photonics, University of Konstanz, 78457 Konstanz, Germany. k.j.yang@sdu.edu.cn
Bromberger
Hubertus
H
Ruf
Hartmut
H
Schäfer
Hanjo
H
Neuhaus
Joerg
J
Dekorsy
Thomas
T
Grimm
Christiana Villas-Boas
CV
Helm
Manfred
M
Biermann
Klaus
K
Künzel
Harald
H