10 Hz Stable
Mode-locked
Er-Fiber
Laser
F. Qamar
Physics
Department, Faculty
of Sciences,
Damascus University,
Damascus, Syria.
Doi: https://doi.org/10.47011/16.4.7
Cited by :
Jordan J. Phys.,
16 (4) (2023)
447-455
PDF
Received
on:
22/11/2021;
Accepted
on:
21/03/2022
Abstract:
In this
paper, a
stable
output
at the
reduction
repetition
rate
from 80
MHz
mode-locked
Er-doped
fiber
laser (EDFL)
was
demonstrated
by
adjusting
the
operating
point
for
external
LiNbO3
Mach-Zehnder
electro-optic
intensity
modulator
to
suppress
harmonic
mode-locked
pulses.
More
than 70%
of the
laser
beam was
launched
into the
external
pigtail
Mach-Zehnder
intensity
modulator
using
single
mode
fiber
with
collimating
lens and
fiber
(ferrule
connector)
FC
adapter.
The
optimum
values
of Mach-Zehnder
modulator
bias
voltages
V0
and Vπ
(half
wave
voltage)
which
resulted
in
maximum
and
minimum
laser
output
power to
leave
the
modulator
were
found at
6.5 and
0.29 V,
respectively.
The best
modulation
was
achieved
for the
RF
modulating
signal
with an
opening
time of
about 8
ns. For
driving
voltage
equal to
Vπ,
a clean
mode-locked
pulse
train
was
generated
with a
pulse
shape
and
energy
similar
to the
input
pulse,
albeit
with a
low
repetition
rate.
The
minimum
repetition
rate
reached
as low
as 10
Hz,
resulting
in pulse
energy
and peak
power of
0.32 nJ
and 1.5
kW,
respectively.
Second-harmonic
generation
of the
low
repetition
rate
pulse
train
was also
produced
by using
a PPLN
crystal.
This
opens up
the
potential
for
using
this
laser in
single
photon
detection
experiments
and as a
seed
laser
for many
applications.
Keywords:
Er-fiber
laser,
Passively
mode-locked
fiber
laser,
Nonlinear
polarization
rotation,
Mach-Zehnder
modulator,
Fast
electro-optic
modulator.
PACS:
Fiber
lasers,
42.55.Wd,
Mode
locking,
42.60.Fc.
References
[1] Anderson,
D., Desaix, M.,
Lisak, M. and
Quiroga-Teixeiro,
M.L., J. Opt.
Soc. Am. B, 9
(8) (1992) 1358.
[2] Chong, A.,
Buckley, J.,
Renninger, W.
and Wise, F.,
Opt. Exp., 14
(21) (2006)
10095.
[3] Haus, H.A.,
Tamura, K.,
Nelson, L.E. and
Ippen, E.P.,
IEEE J. Quantum
Electron., 31
(3) (1995) 591.
[4] Li, J.,
Andrekson, P.A.
and Bakhshi, B.,
IEEE Photon.
Tech. Lett., 12
(9) (2000) 1150.
[5] Nakazawa, M.
and Yoshida, E.,
IEEE Photon.
Tech. Lett., 12
(12) (2000)
1613.
[6] Zhang, M.,
Chen, L.L.,
Zhou, C., Cai,
Y., Ren, L. and
Zhang, Z.G.,
Las. Phys. Lett.,
6 (9) (2009)
657.
[7] Fourmaux,
S., Serbanescu,
C., Kincaid, R.E.,
Krol, Jr.A. and
Kieffer, J.C.,
Appl. Phys. B,
94 (4) (2008)
569.
[8] Baumler, W.,
Schmalzl, A.X.,
Gobi, G. and
Penzkofer, A.,
Meas. Sci.
Technol., 3
(1992) 384.
[9] Saliminia,
A., Nguyen, N.,
Nadeau, M.,
Petit, S., Chin,
S. and Vallée,
R., J. Appl.
Phys.,
93 (2003)
3724.
[10] Green, W.,
Rooks, M.,
Sekaric, L. and
Vlasov, Y., Opt.
Exp., 15 (25)
(2007) 17106.
[11] Zhang, G.
and Cheng, G.,
Appl. Opt., 54
(30) (2015)
8957.
[12] Li, M.,
Wang, L., Li,
X., Xiao, X. and
Yu, Sh.,
Photonics Res.,
6 (2) (2018)
109.
[13] Chen, A.
and Murphy, E.J.,
“Broadband
optical
Modulators -
Science,
Technology and
Applications”, (CRC
Press, 2012).
[14] Svarny, J.,
Proc. BEC,
Tallinn, Estonia,
(2010) 231.
[15] Svarny, J.
and Chladek, S.,
J. Lightwave
Technol., Early
Access (2021).
[16] Wang, R.,
Dai, Y., Yin,
F., Xu, K., Yan,
L., Li, J. and
Lin, J., Opt.
Exp., 21 (18)
(2013) 209.
[17] DePriest,
C., Yilmaz, T.,
Delfyett, P.,
Etemad, S.,
Braun, A. and
Abeles, J., Opt.
Lett., 27 (9)
(2002) 719.
[18] Pan, S. and
Lou, C., IEEE
Photon. Techn.
Lett., 18 (13)
(2006) 1451.
[19] Jain, A.,
Chandra, N.,
Anchal, A. and
Kumar, P., Opt.
& Las. Tech., 83
(2016) 189.
|
