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Lasers and Laser Optics
Enhanced nonlinear optical response of layered WSe
1.4
Te
0.6
alloy in 1 μm passively
Q
-switched laser
Zhengting Du
1
Tianqi Zhang
1
Zhenda Xie
2,*
Jian Ning
1
[ ... ]
Shining Zhu
1
Author Affiliations
Abstract
1
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
2
School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China
Due to the composition-dependent properties of two-dimensional (2D) transition metal dichalcogenides (TMDs), alloying of existing dissimilar TMDs architecture is a novel and controllable route to tailor crystal structures with superior optical and optoelectronic properties. Here, we reported the hexagonal-phase WSe
1.4
Te
0.6
alloy can enable great promise for enhanced saturable absorption response exceeding the parent component WSe
2
and WTe
2
, with larger modulation depth and lower saturable intensity. These advantages allowed the 1064 nm passively
Q
-switched lasers based on WSe
1.4
Te
0.6
to be more efficient, with pulse duration narrowed to 45%, and slope efficiency increased by 232%. Our findings highlighted the appropriate alloying of TMDs as an effective strategy for development of saturable absorbers.
140.3540
Lasers, Q-switched
160.4236
Nanomaterials
PDF全文
Full Text
Chinese Optics Letters
2019, 17(12): 121404
Lasers and laser optics
1514 nm eye-safe passively
Q
-switched self-optical parametric oscillator based on Nd
3+
-doped MgO:PPLN
Heyan Liu
1
Yongji Yu
1,*
Dehui Sun
2
Hong Liu
2
[ ... ]
Guangyong Jin
1
Author Affiliations
Abstract
1
Jilin Key Laboratory of Solid Laser Technology and Application, School of Science, Changchun University of Science and Technology, Changchun 130022, China
2
Institute for Advanced Interdisciplinary Research, University of Jinan, Jinan 250022, China
We examined a 1514 nm eye-safe passively
Q
-switched self-optical parametric oscillator. The nonlinear crystal is an
a
-cut Nd:MgO:PPLN crystal, and the size of the crystal was 6 mm × 2 mm × 30 mm with 0.4 at.% Nd
3+
doped and a grating period of 29.8 μm. When the crystal absorbed 12.8 W, the output maximum single-pulse energy reached 39 μJ, and a pulse width of 6.1 ns at a repetition rate of 5.4 kHz was obtained. The peak power was 6 kW, giving a slope efficiency of 42%.
140.3540
Lasers, Q-switched
190.4970
Parametric oscillators and amplifiers
140.3480
Lasers, diode-pumped
140.3460
Lasers
PDF全文
Full Text
Chinese Optics Letters
2019, 17(11): 111404
Lasers and laser optics
High peak power 1.0 μm and tri-wavelength 1.3 μm Nd:ScYSiO
5
crystal lasers
Qiangguo Wang
2
Na Cui
2
Yongping Yao
2
Lihua Meng
2
[ ... ]
Dehua Li
2,**
Author Affiliations
Abstract
1
College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China
2
College of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao 266590, China
With a Nd:ScYSiO
5
crystal, a high peak power electro-optically
Q
-switched 1.0 μm laser and tri-wavelength laser operations at the 1.3 μm band are both investigated. With a rubidium titanyle phosphate (RTP) electro-optical switcher and a polarization beam splitter, a high signal-to-noise ratio 1.0 μm laser is obtained, generating a shortest pulse width of 30 ns, a highest pulse energy of 0.765 mJ, and a maximum peak power of 25.5 kW, respectively. The laser mode at the highest laser energy level is the TEM
00
mode with the
M
2
value in the
X
and
Y
directions to be
M
x
2
= 1.52 and
M
y
2
= 1.54. A tri-wavelength Nd:ScYSiO
5
crystal laser at 1.3 μm is also investigated. A maximum tri-wavelength output power is 1.03 W under the absorbed pump power of 7 W, corresponding to a slope efficiency of 14.8%. The properties of the output wavelength are fully studied under different absorbed pump power.
140.3380
Laser materials
140.3540
Lasers, Q-switched
PDF全文
Full Text
Chinese Optics Letters
2019, 17(11): 111403
Lasers and laser optics
Passively
Q
-switched self-frequency doubling Nd
3+
:ReCa
4
O(BO
3
)
3
(Re = Y, Gd) lasers with tin diselenide as a saturable absorber
Download:748次
Yuxiang Sun
1
Mengxia Wang
1
Xinle Wang
1
Ying Zhou
1
[ ... ]
Xinguang Xu
1,2
Author Affiliations
Abstract
1
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
2
Key Laboratory of Functional Crystal Materials and Device (Shandong University), Ministry of Education, Jinan 250100, China
With tin diselenide (SnSe
2
) film as a saturable absorber (SA), the passively
Q
-switched self-frequency doubling (SFD) lasers were realized in Nd
3+
:ReCa
4
O(BO
3
)
3
(Re = Y, Gd) crystals. For Nd:YCa
4
O(BO
3
)
3
crystal, the maximum average output power at 532 nm was 19.6 mW, and the corresponding pulse repetition frequency, pulse duration, single pulse energy, and peak power were 17.6 kHz, 91.9 ns, 1.1 μJ, and 12.1 W, respectively. For Nd:GdCa
4
O(BO
3
)
3
crystal, these values were 14.5 mW, 22.1 kHz, 48.7 ns, 0.66 μJ, and 13.5 W.
140.3580
Lasers, solid-state
140.3540
Lasers, Q-switched
160.4236
Nanomaterials
160.4330
Nonlinear optical materials
PDF全文
Full Text
Chinese Optics Letters
2019, 17(6): 061402
Lasers and laser optics
Highly efficient electro-optically
Q
-switched 473 nm blue laser
Tingting Lu
Jian Ma
Xiaolei Zhu
*
Weibiao Chen
Author Affiliations
Abstract
Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
An external frequency doubling electro-optically
Q
-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) 473 nm blue laser was demonstrated. With absorbed pump energy of 48 mJ at 100 Hz repetition rate, about 2 mJ of 473 nm blue laser pulse energy was achieved by cascade frequency doubling. The second harmonic conversion efficiency was 64.5%, and overall optical-optical efficiency was 4.2%, respectively. The blue laser pulse width was less than 10 ns, and beam quality factor was less than 2.4.
140.3540
Lasers, Q-switched
140.3515
Lasers, frequency doubled
140.3530
Lasers, neodymium
140.3480
Lasers, diode-pumped
PDF全文
Full Text
Chinese Optics Letters
2019, 17(5): 051405
Lasers and laser optics
Watt-level continuous-wave and passively
Q
-switched red lasers pumped by a single blue laser diode
Download:845次
Yuxia Zhang
1
Yilun Yang
2
Lianhan Zhang
2
Dazhi Lu
1
[ ... ]
Huaijin Zhang
1,**
Author Affiliations
Abstract
1
State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
2
Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3
College of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
Praseodymium-ion-doped gain materials have the superiority of lasing at various visible wavelengths directly. Simple and compact visible lasers are booming with the development of blue laser diodes in recent years. In this Letter, we demonstrate the watt-level red laser with a single blue laser diode and Pr:YLiF
4
crystal. On this basis, the passively
Q
-switched pulse lasers are obtained with monolayer graphene and Co:ZnO thin film as the
Q
-switchers in the visible range.
140.3480
Lasers, diode-pumped
140.3540
Lasers, Q-switched
140.7300
Visible lasers
PDF全文
Full Text
Chinese Optics Letters
2019, 17(7): 071402
Lasers and laser optics
Gold nanorods as saturable absorbers for the passively
Q
-switched Nd:LLF laser at 1.34 μm
Qizhang Qian
1
Nan Wang
2
Shengzhi Zhao
1
Guiqiu Li
1,*
[ ... ]
Houyi Ma
2
Author Affiliations
Abstract
1
School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao 266237, China
2
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
Gold nanorods (GNRs) with two different aspect ratios were successfully utilized as saturable absorbers (SAs) in a passively
Q
-switched neodymium-doped lutetium lithium fluoride (Nd:LLF) laser emitting at 1.34 μm. Based on the GNRs with an aspect ratio of five, a maximum output power of 1.432 W was achieved, and the narrowest pulse width was 328 ns with a repetition rate of 200 kHz. But, in the case of the GNRs with the aspect ratio of eight, a maximum output power of 1.247 W was achieved, and the narrowest pulse width was 271 ns with a repetition rate of 218 kHz. Our experimental results reveal that the aspect ratios of GNRs have different saturable absorption effects at a specific wavelength. In other words, for passively
Q
-switched lasers at a given wavelength, we are able to select the most suitable GNRs as an SA by changing their aspect ratio.
140.3480
Lasers, diode-pumped
140.3540
Lasers, Q-switched
140.3070
Infrared and far-infrared lasers
PDF全文
Full Text
Chinese Optics Letters
2019, 17(4): 041401
Extraordinary 2D Materials Based Nanophotonics
WSe
2
as a saturable absorber for multi-gigahertz
Q
-switched mode-locked waveguide lasers [Invited]
Ziqi Li
1
Rang Li
1
Chi Pang
1
Yuxia Zhang
2
[ ... ]
Feng Chen
1,*
Author Affiliations
Abstract
1
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
2
State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
Graphene and other extraordinary two-dimensional materials together with recent advances in optical modulators have set the foundations for the widespread applications of next-generation optoelectronic devices. In this work, we report on the high-performance fundamentally mode-locked waveguide laser modulated by chemical-vapor-deposition-grown WSe
2
as a saturable absorber. By incorporating a WSe
2
sample into a monolithic Nd:YVO
4
waveguide platform, 6.526 GHz picosecond pulsed laser generation has been achieved at the wavelength of 1 μm with pulse duration of 47 ps.
160.4236
Nanomaterials
140.4050
Mode-locked lasers
140.3540
Lasers, Q-switched
PDF全文
Full Text
Chinese Optics Letters
2019, 17(2): 020013
Extraordinary 2D Materials Based Nanophotonics
High-power passively
Q
-switched Nd:GdVO
4
laser with a reflective graphene oxide saturable absorber
Taijin Wang
Jiang Wang
Yonggang Wang
*
Xiguang Yang
[ ... ]
Zhendong Chen
Author Affiliations
Abstract
School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, China
A single output
Q
-switched Nd:GdVO
4
laser with a reflective graphene oxide (GO) saturable absorber was demonstrated. The shortest pulse duration in the
Q
-switched laser is 115 ns, and the output power ranges from 1.23 W at 1.71 MHz to 2.11 W at 2.50 MHz when the pump power rises from 7.40 to 10.90 W with the utilization of GO Langmuir–Blodgett (LB) films based on the convenient and low-cost LB technique. To the best of our knowledge, it is the highest output power in a
Q
-switched laser with a GO saturable absorber.
140.3540
Lasers, Q-switched
140.3580
Lasers, solid-state
PDF全文
Full Text
Chinese Optics Letters
2019, 17(2): 020009
Extraordinary 2D Materials Based Nanophotonics
Q
-switched fiber laser operating at 1.5 μm based on WTe
2
Mengli Liu
1
Yuyi Ouyang
1
Huanran Hou
1
Wenjun Liu
1,*
Zhiyi Wei
2,**
Author Affiliations
Abstract
1
State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
2
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Compared with the extensively studied MoS
2
and WS
2
, WTe
2
owns a smaller bandgap, which is applicable to a near-infrared system in photodetectors, communications, and ultrafast optics. In this work, the WTe
2
saturable absorber (SA) with the tapered fiber structure is prepared by the magnetron-sputtering technology, which enables the prepared SA to be low in cost and have strong nonlinearity. The modulation depth of the prepared WTe
2
SA is measured as 31.06%. The
Q
-switched fiber laser operating at 1.5 μm is successfully investigated by incorporating the proposed SA into the prepared ring cavity. To the best of our knowledge, this is the first attempt of WTe
2
in the
Q
-switched fiber laser at 1.5 μm.
160.4330
Nonlinear optical materials
140.3540
Lasers, Q-switched
PDF全文
Full Text
Chinese Optics Letters
2019, 17(2): 020006
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