The dual-wavelength paired-pulse output of a compact self-
Q
-switched
T
m
:
Y
A
l
O
3
intra-cavity pumping
H
o
:
L
u
L
i
F
4
laser was first demonstrated
experimentally. By exploiting the self-
Q
-switching mechanism of
T
m
:
Y
A
l
O
3
and the gain-switching operation of
H
o
:
L
u
L
i
F
4
in a cavity, the dual-wavelength
paired pulses were robustly generated with the pulse energy of
29 µJ, pulse width of 2.5 µs at 1944 nm, pulse
energy of 31 µJ, and pulse width of 338 ns at
2066 nm. The maximum average output powers were obtained
simultaneously as high as 525 mW at 1944 nm and
323 mW at 2066 nm. The paired-pulse repetition frequency
can be pump-tunable in the range of 8–22 kHz. The temporal
delay in the paired pulses can be controllable from 9.5 to
2.9 µs with the pump power increasing from 15.2 to
18.4 W. The compact dual-wavelength paired-pulse laser near
2 µm has potential application in the differential absorption
lidar.