Article
Computer Science, Information Systems
V. Hitaishi, Nandam Ashok
Summary: This paper presents a theoretical study on supercontinuum generation using a novel dispersion-engineered reverse rib waveguide design. The waveguide is made of chalcogenide materials, with As2Se3 glass as the core and GeAsSe and GeAsS as the cladding. The structure achieves an ultrawide bandwidth supercontinuum spectrum due to the high nonlinear property of the core material and low mode loss. The proposed waveguide demonstrates an ultra-wide spectrum of up to 16 μm at 10 kW peak power and up to 13 μm broad spectrum at 5 kW peak power. The results of spectral broadening at 2 kW peak power are also discussed. The designed waveguide structure is expected to be beneficial for supercontinuum sources, bio-molecule sensing, and spectroscopy.
Article
Optics
Siqi Lu, Guosheng Lin, Di Xia, Zifu Wang, Liyang Luo, Zhaohui Li, Bin Zhang
Summary: In this study, a sandwich-integrated all-ChG microresonator was used to demonstrate a mid-infrared (MIR) microcomb generator covering a wavelength range from 6.94μm to 12.04μm. The novel microresonator features a symmetrically uniform distribution of the mode field, precise dispersion engineering, and low optical loss, offering a wide transmission window, high Kerr nonlinearity, and hybrid-fabrication flexibility on a silicon wafer. Numerical simulations successfully demonstrated a MIR Kerr frequency comb with a bandwidth of 5.1μm, assisted by dispersive waves. A feasible fabrication scheme for on-demand ChG microresonators was also proposed. These findings highlight the advantages of integrated ChG photonic devices in MIR nonlinear photonics and their potential applications in MIR spectroscopy.
Article
Chemistry, Analytical
Yuefeng Wang, Weiwei Chen, Pengjun Wang, Shixun Dai, Jun Li, Yan Li, Qiang Fu, Tingge Dai, Hui Yu, Jianyi Yang
Summary: A suspended slot chalcogenide glass waveguide gas sensor is proposed, designed, and analyzed in detail, achieving high power confinement factor within a specific wavelength range and demonstrating strong detection performance for methane gas. The optimization of structural parameters leads to improved sensitivity and limit of detection for the proposed waveguide sensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Optics
Colin Sonnichsen, Patrick Brosseau, Cameron Reid, Patanjali Kambhampati
Summary: The system utilizes a commercial OPA to drive a hollow-core fiber, generating sub-10 fs pulses with output pulse energies in the range of 40-80 μJ. The system exhibits minimal power fluctuations, excellent mode quality, and well-behaved spectral phase at the output. By measuring the two-dimensional spectrum of CdSe quantum dots, the strength of this source is demonstrated, providing a substantial extension to the capabilities of CMDS.
Article
Materials Science, Multidisciplinary
Haiyan Shang, Mingjie Zhang, Dandan Sun, Yan-Ge Liu, Zhi Wang, Dong Liu, Siqing Zeng
Summary: Research shows that Ge25Sb10S65 glass has greater hardness and stronger resistance to laser damage, making it suitable for on-chip integrated devices and applications in optical frequency combs or supercontinuum generation.
RESULTS IN PHYSICS
(2021)
Article
Optics
M. R. Karim, Nayem Al Kayed, B. M. A. Rahman
Summary: This study proposes a promising cascade planar waveguide design made of Si3N4 and As2Se3 glass system for mid-infrared supercontinuum generation using a commercially available femtosecond pump source. The design allows for expanding the supercontinuum coverage far into the mid-infrared region, making it suitable for applications like sensing and biological imaging.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Rasmus Eilkoer Hansen, Callum Robertson Smith, Asbjorn Moltke, Christian Rosenberg Petersen, Sidharthan Raghuraman, Seongwoo Yoo, Ole Bang
Summary: Mid-infrared supercontinuum lasers are crucial in various applications, but their noise level often limits their performance. This paper presents a simple technique to reduce the noise of high noise soliton-based supercontinuum sources. By adding a short piece of normal dispersion fiber, the spectrally distributed solitons are forced to broaden and overlap, effectively averaging out the noise. Experimental and numerical results demonstrate the effectiveness of this noise reduction method using a ZBLAN fiber based mid-IR SC source and highly nonlinear arsenic-sulfide fiber. The method is also applicable to other soliton-based near-IR or mid-IR SC sources and is compared to spectral alignment noise reduction mechanisms.
LASER & PHOTONICS REVIEWS
(2023)
Article
Instruments & Instrumentation
Zan Feng, Jun Wang, Guolin Wu, Jinjing Wang, Xiaolin Liang, Tiesong Xu, Minghui Zhong, Jing Xiao, Jingfei Shen, Zheming Zhao, Xunsi Wang, Peiqing Zhang, Yongxing Liu, Shixun Dai, Rongping Wang
Summary: A low-loss and arsenic-free sulfur-based chalcogenide fiber has been fabricated using a novel process, demonstrating optical loss of <2 dB/m and a mid-infrared supercontinuum spectrum generation. The fiber also shows a high transmission efficiency of 53% at 4 µm, making it significant for applications such as IR night vision and bio-photonics.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Masahito Takakuwa, Kenjiro Fukuda, Tomoyuki Yokota, Daishi Inoue, Daisuke Hashizume, Shinjiro Umezu, Takao Someya
Summary: The study introduces a water vapor plasma-assisted bonding (WVPAB) technique for direct bonding of gold electrodes on ultrathin polymer films, enabling a strong and stable interface for successful interconnection of ultraflexible electronic systems.
Article
Chemistry, Multidisciplinary
Yiming Ma, Yuhua Chang, Bowei Dong, Jingxuan Wei, Weixin Liu, Chengkuo Lee
Summary: Mid-infrared absorption spectroscopy is important for molecule identification and quantification, and integrated photonics technology allows on-chip spectroscopic sensing to minimize device size, cost, and power consumption. The integration of waveguides and photodetectors is essential for on-chip sensing systems, and extending the operating wavelengths to long-wave infrared range faces challenges from both waveguide platforms and photodetection technologies.
Article
Optics
Atsushi Ishizawa, Kota Kawashima, Rai Kou, Xuejun Xu, Tai Tsuchizawa, Takuma Aihara, Koki Yoshida, Tadashi Nishikawa, Kenichi Hitachi, Guangwei Cong, Noritsugu Yamamoto, Koji Yamada, Katsuya Oguri
Summary: We achieved the simultaneous generation of a wide spectrum of supercontinuum and third-harmonic light using a dispersion-controlled silicon-nitride waveguide. By fabricating special waveguides and utilizing their properties, we were able to measure accurate carrier-envelope-offset signals and demonstrate the method's application at telecommunication wavelengths.
Article
Engineering, Electrical & Electronic
Roman Golovchak, Jarres Plummer, Andriy Kovalskiy, Yuriy Holovchak, Tetyana Ignatova, Kyle Nowlin, Anthony Trofe, Yaroslav Shpotyuk, Catherine Boussard-Pledel, Bruno Bureau
Summary: This study proposes a photosensitive medium based on amorphous equichalcogenide thin films containing germanium and antimony, showing promising characteristics for applications in all-chalcogenide photonics, sensors, and photovoltaics. The optical properties, temperature, and exposure wavelength dependence of DC electrical conductivity are comparable to halide perovskites, making amorphous equichalcogenides an attractive alternative. The dark resistivity follows exponential decay with temperature, covering a two-order-of-magnitude range over a 70 K temperature interval. Light exposure leads to significant changes in current, with a strong photocurrent response observed across the entire 400-1000 nm range under low power. The photoresponse of the developed material decreases with an increase in temperature and vanishes at temperatures higher than 120 degrees C when using only a few milliwatts of exposure power.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Physics, Multidisciplinary
Di Xia, Yufei Huang, Bin Zhang, Zelin Yang, Pingyang Zeng, Haiyan Shang, Huanjie Cheng, Linghao Liu, Mingjie Zhang, Ying Zhu, Zhaohui Li
Summary: This study numerically investigates on-chip ultrabroadband MIR SCG in a high numerical aperture chalcogenide waveguide. By optimizing the nonlinear coefficients and dispersion profile of the ChG waveguide with a Ge-As-Se-Te core and Ge-Se upper and lower cladding, broadband SCG ranging from 2 to 13 μm is achieved. A fabrication scheme is proposed for precise manipulation of dispersion design in such sources suitable for compact, chip-integrated molecular spectroscopy applications.
FRONTIERS IN PHYSICS
(2021)
Review
Optics
Yingying Wang, Shixun Dai
Summary: Chalcogenide (ChG) glasses have wide transparency window and high optical nonlinearity, making them excellent candidates for mid-infrared (MIR) supercontinuum (SC) generation. Significant progress has been made in MIR SC generation based on ChG fibers, particularly in spectral extension and output power improvement.
Article
Engineering, Electrical & Electronic
Saleha Fatema, Md Borhan Mia, Sangsik Kim
Summary: In this study, a broadband near-zero dispersion was achieved in a thin silicon nitride waveguide array at near-infrared using multiple mode couplings, covering a spectral range of 1350-1900 nm. By engineering the dispersion of the waveguide array, an octave-spanning supercontinuum was numerically generated with a pump of 100 fs and 200 pJ. The concept of obtaining broadband near-zero dispersion through multiple mode couplings can be applied to other spectral regimes and material platforms by adjusting structural parameters to shift the positions of zero dispersion wavelengths.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Zhao Li, Qingyang Du, Chaopeng Wang, Jinhai Zou, Tuanjie Du, Kathleen A. Richardson, Zhiping Cai, Juejun Hu, Zhengqian Luo
Summary: This work presents the first experimental demonstration of an externally pumped on-chip ultrafast soliton laser source based on Raman soliton self-frequency shift. The source, using Ge28Sb12Se60 chalcogenide glass waveguides, achieves continuous wavelength tunability with high signal-to-noise ratios, significantly improving energy efficiency and demonstrating excellent spectral purity and stability. These results provide insights into soliton dynamics and critical device design guidelines, enabling a new class of broadly tunable, energy-efficient, compact, and potentially cost-effective on-chip ultrafast laser sources.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Lingfeng Gao, Hualong Chen, Rui Wang, Songrui Wei, Artem Kuklin, Shan Mei, Feng Zhang, Ye Zhang, Xiantao Jiang, Zhengqian Luo, Shixiang Xu, Han Zhang, Hans Agren
Summary: In this study, ultra-small 2D PbS nanoplatelets (NPLs) with uniform size were successfully fabricated using a liquid-phase exfoliation approach. The NPLs-based photodetectors (PDs) showed excellent photo-response performance, with high responsivity and detectivity, outperforming current PEC-type PDs. The outstanding properties of the NPLs were further analyzed through first-principle calculations, indicating promising applications in optoelectronic devices and potential breakthrough developments in other fields.
Article
Engineering, Electrical & Electronic
Zhipeng Dong, Honggang Sun, Yimin Zhang, Jinhai Zou, Lixin Xu, Zhengqian Luo
Summary: In this study, a visible-wavelength-tunable vortex-beam fiber laser is demonstrated for the first time, utilizing a Sagnac-loop fiber filter and efficient long-period fiber grating. The laser achieves high mode purity in generating vortex beams, with a wavelength range of 633.89 to 636.02 nm, and a reduction in speckle contrast of 17.13% using cylindrical vector beams (CVBs). This work provides an effective approach for developing compact, wavelength-tunable vortex fiber lasers in the visible spectrum with potential applications in various fields.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Teng Zhang, Wanxin Zheng, Kai Feng, Dong Wang, Bin Xu, Zhengqian Luo, Zhenfang Yu, Xudong Cui, Mauro Luciano Baesso, Tomaz Catunda
Summary: This study demonstrates high-power continuous-wave ultraviolet laser generation through intracavity frequency doubling, and replaces the use of He-Cd vapor laser with solid-state 320 nm ultraviolet laser in various applications.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Jinhai Zou, Jin Li, Tianran Li, Yizhong Huang, Qiujun Ruan, Yanbo Dou, Zhengqian Luo
Summary: This study demonstrates for the first time a compact tunable continuous-wave (CW) deep ultraviolet (DUV) laser source. By directly intracavity frequency doubling visible fiber lasers, efficient DUV laser emission with a wide wavelength tuning range and narrow linewidth is achieved. The developed DUV laser source has high power and efficiency, providing new possibilities for DUV laser applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Honggang Sun, Lixin Wang, Jinhai Zou, Qiujun Ruan, Yu Ding, Chuchu Dong, Zhipeng Dong, Zhengqian Luo
Summary: We report the first visible-wavelength all-fiber passively mode-locked vortex laser, capable of delivering picosecond optical vortex pulses with adjustable pulse duration and narrow linewidth. This study also demonstrates the potential applications of this technology in particle trapping, optical tweezers, and high-resolution microscopy.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Qiujun Ruan, Xiaosheng Xiao, Jinhai Zou, Hang Wang, Shuzheng Fan, Tianran Li, Jin Li, Zhipeng Dong, Zhiping Cai, Zhengqian Luo
Summary: This paper reports a fiber laser capable of spatiotemporal mode-locking (STML) at visible wavelengths, demonstrating its stability and narrow pulse duration through theoretical prediction and experimental realization. The locking of transverse and longitudinal modes is also illustrated, and the power is further boosted by establishing an ultrafast fiber amplifier.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Zhao Li, Fengbo Han, Zhipeng Dong, Qingyang Du, Zhengqian Luo
Summary: In this article, we theoretically investigate the propagation dynamics of mid-IR Raman soliton in a Ge28Sb12Se60 chalcogenide glass waveguide. By carefully engineering the waveguide dispersion and nonlinear interaction, we propose a suspended chalcogenide glass waveguide device that allows an octave-tuning, from 1.96 μm to 3.98 μm, Raman soliton source. Our result provides a solution to continuously tunable on-chip mid-IR ultrafast laser sources.
Article
Optics
J. I. N. F. E. N. Hong, J. I. N. H. A. I. Zou, Y. U. S. H. U. Wang, Q. I. U. J. U. N. Ruan, T. I. N. G. T. I. N. G. Chen, Y. A. N. G. Cheng, Y. I. K. U. N. Bu, Z. H. E. N. G. Q. I. A. N. Luo
Summary: We present a compact continuous-wave all-fiber cyan laser, which achieves downconversion cyan lasing at 491.5 nm with a maximum output power of 97.5 mW, a slope efficiency of 23.7%, and a power fluctuation of less than 0.41%. This all-fiber cyan laser has great significance in expanding the color reproduction range of laser displays and has potential applications in fluorescence imaging, underwater communication, and detection.
Article
Optics
Hang Wang, Yadi Yang, Jinfen Hong, Xin Zhou, Qiujun Ruan, Zhipeng Dong, Mikhail Melkumov, Sergey Firstov, Alexey Lobanov, Zhengqian Luo
Summary: In this study, we demonstrate a dissipative soliton resonance (DSR) in a bismuth-doped phosphosilicate fiber (Bi-PSF) laser operating at dual-wave bands of 1.3/1.4 μm. By utilizing a homemade Raman fiber laser at 1239 nm as the pump source and a non-linear amplifying loop mirror for initiating mode-locking, stable DSR operation is achieved at the wavelengths of 1343 nm and 1406 nm with large spectral bandwidths. This work opens up opportunities for various applications, including all-spectral-band communications, bio-medical imaging, and terahertz difference frequency generation.
Article
Optics
Tianran Li, Ziyu Wang, Jinhai Zou, Jinfen Hong, Qiujun Ruan, Hang Wang, Zhipeng Dong, Zhengqian Luo
Summary: This study demonstrates, for the first time, the direct generation of millijoule-level green pulses from a fiber laser, overcoming the limitations of near-IR laser frequency conversion and providing a model for compact, high-efficiency, and high-energy visible fiber pulsed lasers.
PHOTONICS RESEARCH
(2023)
Article
Optics
Liquan Zhu, Zhipeng Dong, Jinhai Zou, Linxiao Deng, Ting Li, Yuantong Chen, Chun Gu, Lixin Xu, Zhengqian Luo
Summary: This study investigates the use of optical fiber lasers in display systems by integrating a Pr3+-doped green all-fiber laser into a laser projection display system. A 520 nm semiconductor green laser diode module was integrated as a control group for comparison. The color gamut and speckle performances were studied and compared. The experimental group showed slightly better performance in color gamut volume, and the speckle contrast rapidly decreased with increasing power. This study is the first to apply a fiber laser to a laser display system, providing insights for developing speckle-free or speckle-reduced laser display systems.
Article
Engineering, Electrical & Electronic
Zhipeng Dong, Hang Wang, Wencheng Jia, Jinhai Zou, Zhengqian Luo
Summary: In this study, a 488 nm blue picosecond pulse was generated by frequency doubling a homemade 977 nm picosecond fiber laser. The original laser had a 977.84 nm central wavelength, 0.13 nm spectral width, 12.94 ps pulse duration, 76.09 MHz repetition rate, and 5.12 mW average power. After scaling up the power to 2.06 W, the pulse duration and spectral width slightly increased to 16.84 ps and 0.24 nm, respectively. The blue picosecond laser achieved a central wavelength of 488.92 nm and a linewidth of 0.17 nm. This compact and high-power laser has potential applications in high-resolution imaging, underwater detection, and material processing.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Hang Wang, Ziyu Wang, Wencheng Jia, Luming Song, Tingting Chen, Jinhai Zou, Zhipeng Dong, Zhengqian Luo
Summary: A 978 nm ultrafast fiber laser was demonstrated with a robust all-polarization-maintaining mode-locking using a phase-biased nonlinear amplifying loop mirror. It achieved a stable self-starting mode-locking with an average output power of 2.12 W. The laser was further amplified and used for second harmonic generation, producing a 489 nm ultrashort laser.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Optics
Hang Wang, Wencheng Jia, Yongjia Yao, Xinyun Yang, Mikhail Melkumov, Sergey Firstov, Alexey Lobanov, Zhipeng Dong, Zhengqian Luo
Summary: In this study, a 1.3/1.4μm random fiber laser (RFL) was successfully generated using bismuth-doped phosphosilicate fiber. The RFL showed excellent long-term operational stability and a wide emission spectrum. Compared to traditional laser sources, the RFL reduced the speckle contrast of images.
CHINESE OPTICS LETTERS
(2023)
