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Generation of noise-like pulses and soliton rains in a graphene mode-locked erbium-doped fiber ring laser Research

Pinghua Tang, Mulin Luo, Ting Zhao, Yuliang Mao,pinghuatang@xtu.edu.cn,1011773923@qq.com,zthaza@126.com,ylmao@xtu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 287-436 doi: 10.1631/FITEE.2000372

Abstract: We demonstrate the generation of noise-like pulses (NLPs) and soliton rains in a saturable absorber mode-locked erbium-doped fiber laser. Typical NLPs are obtained at a proper pump power and in a cavity polarization state. The soliton rain operation with multiple solitons can be achieved by finely adjusting the cavity polarization state. In addition, distinctive multi-soliton interactions are observed and investigated, including the fundamental mode-locking and multiple pulses. The experimental results can help further understand nonlinear pulse dynamics in ultrafast optics.

Keywords： 掺铒光纤激光器；石墨烯；可饱和吸收体；被动锁模    

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Passive mode-locked Er-doped fiber laser pulse generation based on titanium disulfide saturable absorber Research Articles

Xinxin Shang, Linguang Guo, Huanian Zhang, Dengwang Li, Qingyang Yue,huanian_zhang@163.com,qingyangyue@sdnu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 5,   Pages 615-766 doi: 10.1631/FITEE.2000341

Abstract: In this study, (TiS) polyvinyl alcohol (PVA) film-type (SA) is synthesized with a modulation depth of 5.08% and a saturable intensity of 10.62 MW/cm by liquid-phase exfoliation and spin-coating methods. Since TiS-based SA has a strong nonlinear saturable absorption property, two types of optical soliton were observed in a mode-locked Er-doped . When the pump power was raised to 67.3 mW, a conventional mode-locked pulse train with a repetition rate of 1.716 MHz and a pulse width of 6.57 ps was generated, and the output spectrum centered at 1556.98 nm and 0.466 nm spectral width with obvious Kelly sidebands was obtained. Another type of mode-locked pulse train with the maximum output power of 3.92 mW and pulse energy of 2.28 nJ at the pump power of 517.2 mW was achieved when the polarization controllers were adjusted. Since TiS-based SA has excellent nonlinear saturable absorption characteristics, broad applications in ultrafast photonic are expected.

Keywords： 光纤激光器；被动锁模；可饱和吸收体；二硫化钛    

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Preparation of ultrathin ReS2 nanosheets and their application to Q-switched Er-doped fiber lasers Research

Junshan He, Guohua Zeng, Shaoxian Liu, Haiming Lu, Ruixian Xie, Jingjing Qi, Lili Tao, Bo Zhou,taoll@gdut.edu.cn,zhoubo@scut.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 287-436 doi: 10.1631/FITEE.2000339

Abstract: We study the exfoliation of ultrathin ReS nanosheets from the prepared ReS powder and their application to Q-switched Er-doped fiber laser. XRD, Raman, and XPS spectra confirm the successful preparation of the layered ReS. SEM images show that the obtained ReS sheets have lateral size below 200 nm. The thickness of the ReS nanosheets is smaller than 5 nm according to the AFM results. ReS/PVA film is applied as a in an Er-doped , and a minimum pulse duration of 2.4 μs and an output power of 1.25 mW are obtained, indicating the potential application to Q-switched lasers.

Keywords： 二硫化铼；可饱和吸收体；二维材料；调Q光纤激光器    

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Traditional soliton erbium-doped fiber laser with InSe as saturable absorber Research

Xiaojuan Liu, Guomei Wang, Mingxiao Zhu, Kezhen Han, Wenfei Zhang, Huanian Zhang,zhangwenfei@sdut.edu.cn,huanian_zhang@163.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 287-436 doi: 10.1631/FITEE.2000387

Abstract: Indium selenide (InSe) is a typical layered metal-chalcogenide semiconductor that has potential for developing ultrafast optoelectronic devices. In this work, InSe-polyvinyl alcohol (InSe-PVA) film is employed as saturable absorber and prepared by mixing InSe solution and polyvinyl alcohol solution. The nonlinear absorption properties of the InSe saturable absorber (InSe-SA) are investigated, showing that the nonsaturable absorption and modulation depth are 37.5% and 9.55%, respectively. lasers are generated in erbium-doped fiber (EDF) laser-employed InSe as a mode-locker. The central wavelength and pulse duration of the pulse are 1568.73 nm and 2.06 ps, respectively, under a repetition rate of 1.731 MHz. The maximum average output power is 16.4 mW at the pump power of 413 mW. To the best of our knowledge, this is the first demonstration of a pulse with InSe as a mode-locker. The experimental results further demonstrate that InSe is an outstanding nonlinear absorption material in ultrafast .

Keywords： 光纤激光器；纳米片；传统孤子    

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2.3 μm nanosecond passive Q-switching of an LD-pumped Tm:YLF laser using gold nanorods as a saturable absorber Research

Fu-yan Wu, Shi-qiang Wang, Hai-wei Chen, Hai-tao Huang,wfyjsnu@126.com,wsq274412@126.com,haiwei0819@163.com,hht840211@163.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 312-317 doi: 10.1631/FITEE.2000110

Abstract: Developing new saturable absorbers for use in the mid-infrared region has practical significance for short-pulsed lasers and related scientific and industrial applications. The performance of (GNRs) as saturable absorbers at novel mid-infrared wavelengths needs to be evaluated even though these benefit from ultrafast nonlinear responses and broadband saturable absorption. of an LD-pumped Tm:YLF laser using GNRs was successfully realized in this study. Pulses with an 843 ns pulse width and a 6.67 kHz repetition rate were achieved using this Q-switched laser. Results showed that GNRs provide promising passive Q-switches for Tm-doped lasers.

Keywords： Gold nanorods     Passive Q-switching     2.3 μm     Tm-doped laser materials    

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Sb2Te3 topological insulator for 52 nm wideband tunable Yb-doped passively Q-switched fiber laser Research

Tao Wang, Qiang Yu, Kun Guo, Xinyao Shi, Xuefen Kan, Yijun Xu, Jian Wu, Kai Zhang, Pu Zhou,wujian15203@163.com,kzhang2015@sinano.ac.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 287-436 doi: 10.1631/FITEE.2000577

Abstract: has the advantage of broadband saturable absorption from the visible to the infrared bands. Herein, the two-dimensional material saturable absorber (SA) of the family was first applied experimentally in a wideband tunable passively Q-switched Yb-doped fiber laser. High-quality crystals were synthesized by the flux zone method. The SA with fewer layers was further prepared via a modified mechanical exfoliation procedure. Meanwhile, stable wavelength-tunable passive Q-switching pulse operation was obtained in a Yb-doped fiber ring cavity based on the SA, where the central wavelength can be continuously tuned from 1040.89 to 1092.85 nm. Results suggest that has wideband saturable absorption properties, and that the tunable pulse laser can provide a convenient and simple source for practical applications.

Keywords： 拓扑绝缘体；Sb2Te3；光纤激光；被动调Q激光；波长可调谐激光    

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Graphene-metasurface for wide-incident-angle terahertz absorption Research

Ri-hui Xiong, Xiao-qing Peng, Jiu-sheng Li,lijsh2008@126.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 287-436 doi: 10.1631/FITEE.2000079

Abstract: We demonstrate a structure for tunable wide-incident-angle terahertz wave absorption, which involves depositing planar arrays of on a silicon dioxide substrate. We also discuss how the graphene Fermi-level layer and various substrates affect the absorption characteristics. The absorption of the proposed is above 80% at an incident angle of 0°–60° in frequencies ranging from 0.82 to 2.0 THz. Our results will be very beneficial in the application of terahertz wave communications and biomedical imaging/sensing systems.

Keywords： 石墨烯超表面；太赫兹吸收器；欧米伽形石墨烯图案    

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Several New Semiconductor Lasers and Status, Challenges and Insights of Related Industries

Wei Xin, Li Ming, Li Jian, Wang Chao, Li Chuanchuan

Strategic Study of CAE 2020, Volume 22, Issue 3,   Pages 21-28 doi: 10.15302/J-SSCAE-2020.03.004

Abstract:

As the basis of the whole laser industry, the semiconductor laser industry is not only large-scaled but also has strong radiation and driving capacities. The semiconductor lasers are widely used in industrial, military, and living consumption fields such as optical communication, optical information processing, novel manufacturing, laser display, and biological and medical sensing. To adapt to the gradually expanding application range and satisfy the new requirements of different application scenarios, various new mechanisms, concepts, and structures have been introduced into the semiconductor laser industry through interdisciplinary penetration, greatly optimizing the wavelength coverage, beam quality, device volume, power consumption, modulation speed, and output power of the semiconductor lasers. This paper introduces several rapidly developed new semiconductor lasers by comparing their physical connotation, structural design, and preparation methods. Considering the current development status of related industries in China, we suggest that the development of the semiconductor laser industry should be closely combined with industrial application. The performance of the semiconductor lasers should be optimized in a closed-loop manner relying on the market capacity and the strong systematic development ability in China to promote the key technologies. New principles, structures, and processes should be continually introduced into this industry through interdisciplinary integration. Meanwhile, using the policy-oriented advantages in China, we suggest to increase investment in vertical external cavity surface emitting lasers, micro-nano lasers, and topological insulator lasers and conduct mass production and controllable production, thus to seize the leading position in international competition in the related fields.

Keywords： semiconductor lasers，optically pumped vertical external cavity surface emitting lasers，nanolasers，topological insulator lasers    

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A novel heavy haul train on road safety status monitoring technique based on fiber laser sensors

Du Yanliang,Zhang Wentao

Strategic Study of CAE 2009, Volume 11, Issue 10,   Pages 61-66

Abstract:

A novel heavy haul train safety status monitoring technique based on the fiber laser sensors was proposed in this paper. The principles of the fiber laser sensors were introduced and the schematic of the heavy haul train safety status monitoring was given. The key technologies of the monitoring system were focused, such as the high-performance fiber laser accelerometers, the high-accuracy wavelength demodulation technique, and the in-danger status recognizing technique. The systematic chematic was also proposed.

Keywords： fiber laser     heavy haul train     safety status     on road    

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Principle of Laser Nano-meter Measurement Ruler

Zhang Shulian

Strategic Study of CAE 2005, Volume 7, Issue 3,   Pages 27-34

Abstract:

In the past applications saw laser as light source only, did not involve in internal structure and physical phenomena of lasers. The efforts had been done to transform single HeNe laser into a sensor, but ceased before great breakthrough. This paper reports the progress in investigating Laser Nano-meter Measurement Ruler, which is just the laser itself. The principle is based on the frequency splitting, mode competition, cavity tuning, etc., of laser, which are done or found by the author and colleagues. The configuration is that employing an inter — cavity birefringence element to split a laser frequency into two frequencies, ⊥light and // light; alternately occurring of strong and medium mode competition as the cavity being tuned, dividing the lasing bandwidth to three equivalent parts; again making the laser longitudinal separation being 4/3 of lasing bandwidth. The consequence is that 丄 light suppressing // light dying out in the first A /8 of mirror displacement, ⊥light and //light oscillating together in the second λ/8, //light suppressing ⊥light dying out in the third λ/8, ⊥light and //light dying out together in the fourth λ/8; with one time of repetition of the four regions the displacement of the mirror is λ /2. Calculating the number of polarization regions the displacement is known. The direction of displacement can be judged by the difference of polarization of each region. The cavity mirror of movement is joined with the object to be measured by a guide. The measurement range： 12 mm, resolution： 79.08 nm, linearity： 5×l0-6, 2σ = 0.314 μm. This achievement is significant for both fields of lasers and metrology.

Keywords： displacement measurement     HeNe laser     mode competition     frequency splitting     cavity tuning     longitudinal mode     birefringence    

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Vector soliton and noise-like pulse generation using a Ti3C2 MXene material in a fiber laser Research

Shuai Wang, Lei Li, Yu-feng Song, Ding-yuan Tang, De-yuan Shen, Lu-ming Zhao,sdulilei@gmail.com,lmzhao@ieee.org

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3,   Pages 287-436 doi: 10.1631/FITEE.2000033

Abstract: We built a Tm:Ho co-doped fiber laser using a TiC material as a saturable absorber (SA). The formation of s (VSs) and s (NLPs) was observed. The SA was prepared by dripping a TiC solution on a side-polished D-shaped fiber and then naturally vaporized. The VS is characterized by two coexisting sets of Kelly sidebands. By modulating the polarization controller in the fiber laser, NLPs with about 3.3 nm bandwidth can be switched from the VS. To the best of our knowledge, this is the first time that VSs have been generated in a fiber laser using a TiC material as the SA.

Keywords： 矢量孤子；类噪声脉冲；MXene；光纤激光器    

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Graphene-based siliconmodulators Special Feature on Optoelectronic Devices and Inte

Hao-wen SHU, Ming JIN, Yuan-sheng TAO, Xing-jun WANG

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4,   Pages 458-471 doi: 10.1631/FITEE.1800407

Abstract:

Silicon photonics is a promising technology to address the demand for dense and integrated nextgeneration optical interconnections due to its complementary-metal-oxide-semiconductor (CMOS) compatibility. However, one of the key building blocks, the silicon modulator, suffers from several drawbacks, including a limited bandwidth, a relatively large footprint, and high power consumption. The graphene-based silicon modulator, which benefits from the excellent optical properties of the two-dimensional graphene material with its unique band structure, has significantly advanced the above critical figures of merit. In this work, we review the state-of-the-art graphenebased silicon modulators operating in various mechanisms, i.e., thermal-optical, electro-optical, and plasmonic. It is shown that graphene-based silicon modulators possess the potential to have satisfactory characteristics in intra- and inter-chip connections.

Keywords： Silicon photonics     Graphene     Optical modulator    

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A New Type of Q-switched and Frequency-doubling Green Laser

Chen Fei,Huo Yujing,He Shufang,Feng Lichun

Strategic Study of CAE 2000, Volume 2, Issue 4,   Pages 39-42

Abstract:

A new type of LD pumped Nd： YV04- KTP Q-switched green laser is demonstrated. By using the KTP crystal as both an electro-optic Q-switcher and a frequency-doubling crystal in type II phase matching for generating pulsed green beams, low loss and high efficiency characteristics were realized. Special temperature control technique and aspherical lens with smaller focus length were used in the laser, and all elements were fixed into a whole with epoxy. These measures improved the laser efficiency, output power and laser beam direction stability. Green power with up to 762 W peak output and 12 ns pulse width was obtained.

Keywords： KTP     green laser     electro-optic Q-switcher     frequency-doubling    

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Development of High Brightness Solid-State Laser Technology

Tang Xiaojun, Wang Gang, Liu Jiao, Geng Lin, Jiang Dongsheng

Strategic Study of CAE 2020, Volume 22, Issue 3,   Pages 49-55 doi: 10.15302/J-SSCAE-2020.03.008

Abstract:

Laser propulsion, laser energy transfer, and other major research directions have proposed a major demand for high brightness solid-state laser technology, making relevant research remain the focus of international attention. This paper presents the macro demand for high brightness solid-state laser technology and summarizes the current situation of technology research in China and abroad, its development trend, and the problems for further development. Based on this, the key technologies of high brightness solid-state lasers are analyzed, and some suggestions are proposed for future development. The slab laser and fiber laser have become the focus of research owing to their outstanding advantages. While the output power of a single laser is constantly improving, the laser output with high brightness can be realized using the beam combination method. Key technologies should be promoted to form a technical system as soon as possible, such as new laser materials, high-ranking semiconductor laser pump source, high precision packaging process, adaptive beam control, and key components for beam combination. It is proposed to establish research projects for the solid state laser technology that is represented by the surface gain slab laser technology and has a good potential for development. The research and accumulation of common basic technologies should be strengthened to lay a solid foundation for the continuous improvement of output brightness, conversion efficiency, and power mass radio of solid-state laser in the future.

Keywords： solid-state laser     high brightness     technical route     key technology    

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The Round-metal-resonator CO2 Laser with Spiral Flow

Li Zaiguang,Gong Wei

Strategic Study of CAE 2001, Volume 3, Issue 1,   Pages 58-61

Abstract:

The transverse flow, coaxial flow and diffusion cooling are the current types of high power CO2 laser for industrial applications. A new CO2 laser is being developed. Its round resonator consists of a number of equally-spaced and coaxially-mounted metal cavity units. Each unit has several channels for gas flow and discharge. The discharge ignited at the interface of the flow channel and the cavity is blown into the cavity, where the particles are excited and gain forms. The electrode structure, metal wall action on the active medium cooling, and the gain distribution have been studied. It is shown that the multi-channel blown-in discharge, intercavity spiral flow and adjacent unit rotating certain angle facilitate the circular uniformity of gain distribution. As a result, a new CO2 laser with high beam quality and compactness can be obtained.

Keywords： CO2 laser     round-metal-resonator     spiral flow     beam quality    

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Title Author Date Type Operation

Generation of noise-like pulses and soliton rains in a graphene mode-locked erbium-doped fiber ring laser

Pinghua Tang, Mulin Luo, Ting Zhao, Yuliang Mao,pinghuatang@xtu.edu.cn,1011773923@qq.com,zthaza@126.com,ylmao@xtu.edu.cn

Journal Article

Passive mode-locked Er-doped fiber laser pulse generation based on titanium disulfide saturable absorber

Xinxin Shang, Linguang Guo, Huanian Zhang, Dengwang Li, Qingyang Yue,huanian_zhang@163.com,qingyangyue@sdnu.edu.cn

Journal Article

Preparation of ultrathin ReS2 nanosheets and their application to Q-switched Er-doped fiber lasers

Junshan He, Guohua Zeng, Shaoxian Liu, Haiming Lu, Ruixian Xie, Jingjing Qi, Lili Tao, Bo Zhou,taoll@gdut.edu.cn,zhoubo@scut.edu.cn

Journal Article

Traditional soliton erbium-doped fiber laser with InSe as saturable absorber

Xiaojuan Liu, Guomei Wang, Mingxiao Zhu, Kezhen Han, Wenfei Zhang, Huanian Zhang,zhangwenfei@sdut.edu.cn,huanian_zhang@163.com

Journal Article

2.3 μm nanosecond passive Q-switching of an LD-pumped Tm:YLF laser using gold nanorods as a saturable absorber

Fu-yan Wu, Shi-qiang Wang, Hai-wei Chen, Hai-tao Huang,wfyjsnu@126.com,wsq274412@126.com,haiwei0819@163.com,hht840211@163.com

Journal Article

Sb2Te3 topological insulator for 52 nm wideband tunable Yb-doped passively Q-switched fiber laser

Tao Wang, Qiang Yu, Kun Guo, Xinyao Shi, Xuefen Kan, Yijun Xu, Jian Wu, Kai Zhang, Pu Zhou,wujian15203@163.com,kzhang2015@sinano.ac.cn

Journal Article

Graphene-metasurface for wide-incident-angle terahertz absorption

Ri-hui Xiong, Xiao-qing Peng, Jiu-sheng Li,lijsh2008@126.com

Journal Article

Several New Semiconductor Lasers and Status, Challenges and Insights of Related Industries

Wei Xin, Li Ming, Li Jian, Wang Chao, Li Chuanchuan

Journal Article

A novel heavy haul train on road safety status monitoring technique based on fiber laser sensors

Du Yanliang,Zhang Wentao

Journal Article

Principle of Laser Nano-meter Measurement Ruler

Zhang Shulian

Journal Article

Vector soliton and noise-like pulse generation using a Ti3C2 MXene material in a fiber laser

Shuai Wang, Lei Li, Yu-feng Song, Ding-yuan Tang, De-yuan Shen, Lu-ming Zhao,sdulilei@gmail.com,lmzhao@ieee.org

Journal Article

Graphene-based siliconmodulators

Hao-wen SHU, Ming JIN, Yuan-sheng TAO, Xing-jun WANG

Journal Article

A New Type of Q-switched and Frequency-doubling Green Laser

Chen Fei,Huo Yujing,He Shufang,Feng Lichun

Journal Article

Development of High Brightness Solid-State Laser Technology

Tang Xiaojun, Wang Gang, Liu Jiao, Geng Lin, Jiang Dongsheng

Journal Article

The Round-metal-resonator CO2 Laser with Spiral Flow

Li Zaiguang,Gong Wei

Journal Article