Review
Optics
K. Y. Lau, D. Hou
Summary: This paper comprehensively reviews the use of material-based saturable absorbers in mode-locked fiber lasers, discussing advantages and challenges in areas such as material synthesis techniques, characteristics, composite materials, structure design, and deposition techniques. Concrete recommendations are provided to address current issues and challenges, aiming to contribute to further development in this field.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Instruments & Instrumentation
K. Y. Lau, M. Z. Zulkifli
Summary: Graphene as a saturable absorber was used in a fiber laser to generate multiple mode-locked lasers with different wavelengths, providing new insights for the development of optical pulse technology.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Xin Li, D. N. Wang, Kuo Hua, Qi Chen, Yunpeng Ge, Q. K. Xia
Summary: A hybrid passive mode-locked fiber laser based on a saturable absorber fabricated with graphene coating on a single-mode fiber with short waveguides is proposed. The laser operation combines nonlinear polarization rotation and saturable absorption. The hybrid mode-locked fiber laser achieves shorter pulse width and higher signal-to-noise ratio compared to using nonlinear polarization rotation mode locking alone.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Optics
Hou Shaodong, Lu Chengjin, Lin Haifeng, Wang Jinzhang, Guo Chunyu, Cheng Jianqun, Zhang Min, Yan Peiguang
Summary: This study presents the nonlinear absorption of three Sb-related materials in the 2 μm waveband, showing their potential for use in photonic devices requiring ultrafast optical switching and modulation. The materials exhibited stable pulse durations, output powers, and signal-to-noise ratios, indicating their suitability for applications in Tm-doped fiber lasers.
Article
Optics
Nurul Athirah M. A. Ghafar, Nur Farhanah Zulkipli, Ahmad Haziq A. Rosol, A. H. Zaidan, Y. G. Y. Yhuwana, Arni Munira Markom, Moh Yasin, Sulaiman Wadi Harun
Summary: Picosecond laser pulses are generated by utilizing the saturable absorption of Vanadium Aluminum Carbide (V2AlC) MAX phase as a mode-locker in an Erbium-doped fiber laser (EDFL) cavity. The V2AlC-PVA film functions as a saturable absorber (SA) and successfully produces a highly stable soliton pulse operating at 1560 nm wavelength.
Article
Chemistry, Multidisciplinary
Arni Munira Markom, Nurul Athirah Mohamad Abdul Ghafar, Malathy Batumalay, Yusrina Yusof, Ahmad Haziq Aiman Rosol, Nur Farhanah Zulkipli, Ahmad Razif Muhammad, Hazlihan Haris, Ismail Saad, Sulaiman Wadi Harun
Summary: We developed an erbium-doped fiber-based saturable absorber (SA) using niobium aluminium carbide (Nb2AlC) nanomaterial, which can generate stable mode-locked pulses. The SA was fabricated with polyvinyl alcohol (PVA) and the Nb2AlC nanomaterial, producing pulses operating at 1530 nm with a repetition rate of 1 MHz and pulse width of 6.375 ps. A peak pulse energy of 7.43 nJ was achieved at 175.87 mW pump power. This study not only provides design suggestions for SAs based on MAX phase materials but also demonstrates the great potential of MAX phase materials for generating ultra-short laser pulses.
Article
Optics
Qimeng Lin, Li Yan, Yuanqi Song, Xuzhuo Jia, Xiaoqiang Feng, Lei Hou, Jintao Bai
Summary: This study demonstrated the switchable single- and dual-wavelength femtosecond soliton generation in Er-doped fiber lasers using GO-COOH saturable absorbers for the first time. By adjusting the pump power, dual-wavelength solitons can be obtained at 1531.9 nm and 1555.2 nm. The experimental results showed the great potential of GO-COOH in ultrafast fiber lasers as broadband SAs.
CHINESE OPTICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Pei Zhang, Kaharudin Dimyati, Bilal Nizamani, Mustafa M. Najm, S. W. Harun
Summary: In this study, self-starting Q-switching, Q-switched mode-locking, and mode-locking operation modes were successfully achieved in an all-fiber erbium-doped fiber laser using a thulium-doped fiber saturable absorber for the first time. The results demonstrate the capability of generating stable dark soliton pulses and highlight the potential of this fiber laser for applications in optical communication and signal processing systems.
Article
Optics
Tengfei Dai, Jianhua Chang, Zhiliang Deng, Hongxu Li, Xiang Liu, Haibin Ni, Jun Sun
Summary: This study demonstrates for the first time the electrically switched operational regimes of an Nd:YVO4 all-solid-state mode-locked laser with a high modulation ratio. The laser automatically switches multiple operation regimes with the assistance of electrical signals, including Q-switching, Q-switched mode-locking, and continuous-wave mode-locking. The device operates at an ultralow electrical modulation power and achieves high average output power, providing a foundation for exploring their applications in electro-optical devices.
Article
Optics
A. R. Muhammad, A. M. Markom, S. W. Harun, Z. Jusoh, P. Yupapin
Summary: The experimental investigation demonstrated the use of newly developed copper nanoparticles as a saturable absorber in the 1550 nm operating region, generating laser output with high signal-to-noise ratio and long-term stability.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Suziana Omar, A. H. A. Rosol, A. A. A. Jafry, Nur Farhanah Zulkipli, Zulzilawati Jusoh, Baktiar Musa, Moh Yasin, Sulaiman Wadi Harun
Summary: The study successfully implemented Ti3AlC2 MAX-phase material as saturable absorber in an Erbium-doped fiber laser, generating stable soliton pulses and demonstrating its potential advantages as a SA.
Article
Chemistry, Multidisciplinary
Chi-Cheng Yang, Chih-Hsien Cheng, Ting-Hui Chen, Yung-Hsiang Lin, Jr-Hau He, Din-Ping Tsai, Gong-Ru Lin
Summary: Amorphous-Ge (a-Ge) or free-standing nanoparticles (NPs) synthesized via hydrogen-free plasma-enhanced chemical vapor deposition (PECVD) can be used as transmissive or reflective saturable absorbers to start up passively mode-locked erbium-doped fiber lasers (EDFLs). The a-Ge film can serve as a saturable absorber for self-starting EDFL pulsation, while the Ge-NP-on-Au (Ge-NP/Au) films can act as a reflective-type saturable absorber for broadened pulsewidth under high-gain operation. Both the a-Ge film and free-standing Ge NP exhibit potential as transmissive and reflective saturable absorbers, respectively, for ultrafast fiber lasers.
Article
Optics
Cuihong Jin, Chenning Tao, Yusheng Zhang
Summary: We numerically simulate the effects of a saturable absorber (SA) on the output performance of a Tm-doped mode-locked fiber laser in the anomalous dispersion regime. Our study investigates the impacts of SA recovery time, modulation depth, nonsaturable loss, and saturable energy on parameters such as pulse width and spectral bandwidth. Our findings reveal the instability and distortion of output pulses when the SA recovery time is below a critical value, as well as the sensitivity of stable conventional soliton pulse generation to the SA's modulation depth and cavity dispersion. These results have significant implications for fiber laser design and our understanding of the SA effect at mid-infrared wavelengths.
OPTICS COMMUNICATIONS
(2023)
Article
Optics
Jinho Lee, Suh-Young Kwon, Ju Han Lee
Summary: The study demonstrated the use of a V2AlC saturable absorber in a harmonically mode-locked erbium-doped fiber laser, successfully adjusting the repetition rate to generate high-frequency mode-locked pulses.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Han Pan, Xiaoyang Ma, Hongwei Chu, Ying Li, Zhongben Pan, Shengzhi Zhao, Jinying Zhang, Dechun Li
Summary: Two-dimensional layered nanosheets of violet phosphorene (VP) have been experimentally studied for their nonlinear optical properties, demonstrating a strong saturable absorption response. A VP-DSF saturable absorber mode-locked erbium doped fiber laser generated ultrashort pulses, and stable soliton molecule mode-locking pulses were achieved by adjusting the polarization state in the same laser cavity. These results highlight the potential of VP-based nanomaterials in ultrafast photonics applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Optics
Sangbum Kim, Kihong Kim
Article
Physics, Multidisciplinary
Ba Phi Nguyen, Duy Khuong Phung, Kihong Kim
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2020)
Article
Physics, Multidisciplinary
Seulong Kim, Kihong Kim
Summary: In this theoretical study, mode conversion and resonant absorption of high-frequency electromagnetic waves into longitudinal modes in magnetized and stratified plasmas are investigated. It is found that mode conversion only occurs for extraordinary waves, and the mode conversion coefficient can be close to one in certain parameter ranges. The results suggest strong asymmetry under sign changes of the incident angle and external magnetic field, with implications for plasma heating phenomena.
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2021)
Editorial Material
Communication
Kihong Kim
Editorial Material
Communication
Kihong Kim
Editorial Material
Communication
Kihong Kim
Editorial Material
Communication
Kihong Kim
Article
Mechanics
Seulong Kim, Kihong Kim
Summary: In this paper, we theoretically study mode conversion and resonant overreflection of magnetohydrodynamic waves in an inhomogeneous plane-stratified plasma with the presence of a nonuniform shear flow. By using precise numerical calculations, we find that there can be a giant overreflection where the reflectance is much larger than 10 under certain conditions. The overreflection occurs in a fairly broad range of incident angles, frequency, and plasma beta, and its mechanism is explained in terms of the formation of inhomogeneous and open cavities close to the resonances.
Editorial Material
Communication
Kihong Kim
Article
Materials Science, Multidisciplinary
Ba Phi Nguyen, Duy Khuong Phung, Kihong Kim
Summary: We numerically investigate the time evolution of wave packets in one-dimensional semi-infinite lattices with mosaic modulated random on-site potentials. We find that the long-time behavior of the time-dependent reflectance obeys a power law, indicating the onset of Anderson localization or classical diffusion. The phenomena of delocalization occur at certain discrete values of the central energy and depend on the modulation period. We provide an analytical formula for the quasiresonance energies and explain the delocalization phenomenon based on the interplay between randomness and band structure. The states at the quasiresonance energies are found to be critical states through finite-size scaling analysis.
Article
Materials Science, Multidisciplinary
Kihong Kim, Seulong Kim
Summary: Based on the presented research and calculations, we find that mode conversion of transverse electromagnetic waves into longitudinal oscillations and the associated resonant absorption of wave energy also occur in electronic and photonic systems when there is an inhomogeneous potential or medium parameter. This phenomenon behaves similarly to the mode conversion and resonant absorption observed in p-polarized electromagnetic waves in an unmagnetized plasma.
Article
Materials Science, Multidisciplinary
Seulong Kim, Kihong Kim
Article
Communication
Kihong Kim
Article
Communication
Kihong Kim, Yeonok Chung
Article
Materials Science, Multidisciplinary
Seulong Kim, Kihong Kim
