Article
Optics
Ronghui Xu, Xianqiang Zhang, MinMin Xue, Ming Chen, Yu Cheng, Hongchang Deng, Shijie Deng, Houquan Liu, Chuanxin Teng, Hongyan Yang, ShiLiang Qu, Libo Yuan
Summary: In this study, a compact multiwavelength Brillouin-erbium fiber laser (MBEFL) with quadruple-Brillouin-frequency spacing was demonstrated. By adjusting the Brillouin pump (BP) and the 980 nm pumps, eight stable wavelengths were produced with a wavelength spacing of 0.348 nm. The proposed MBEFL has diverse applications in dense wavelength division multiplexing optical communication, microwave photonics and fiber-optic sensors.
LASER PHYSICS LETTERS
(2021)
Article
Optics
Shinya Kato, Takao Aoki
Summary: We demonstrate the realization of single-frequency stimulated Brillouin lasing in short fiber Fabry-Perot resonators. By adjusting the parameters of fiber Bragg gratings, we avoid cascaded lasing and achieve efficient, compact, narrow-linewidth light sources.
Article
Optics
Chen Chen, Haiyang Wang, Ping Lu, Stephen Mihailov, Liang Chen, Xiaoyi Bao
Summary: We demonstrate self-injection locking in an Er-doped random fiber laser using a high-Q random fiber grating ring (RFGR) resonator, achieving single-mode narrow-linewidth lasing with ultra-low intensity and frequency noise. The RFGR resonator includes a fiber ring with a random fiber grating that provides random feedback modes and noise suppression filters with self-adjusted peak frequency adaptable to small perturbations, allowing for stable single longitudinal mode operation for over 7000 seconds with frequency jitter below 3.0 kHz. Single-mode operation is achieved by controlling the phase delays and mode coupling between the main ring and RFGR, resulting in a side-mode suppression ratio of 70 dB and a narrow linewidth of 1.23 kHz. The relative intensity noise is -140 dB/Hz above 100 kHz and the frequency noise is 1 Hz/Hz(1/2) above 10 kHz.
Article
Optics
Yafeng Huang, Su Fang, Lingke Wang, Di Hu, Ming Li, Meifeng Ye, Yating Wang, Yinnan Chen, Liang Liu, Tang Li
Summary: A temperature-insensitive fiber-delay-line-stabilized laser based on a dual Mach-Zehnder interferometer was demonstrated. By using polarization maintaining fibers, the laser frequency noise induced by temperature fluctuation of the fiber delay line was effectively reduced.
Article
Engineering, Electrical & Electronic
Harith Ahmad, Siti N. Aidit, Muhamad Z. Samion, Siyi Wang, Yu Wang, Jayanta K. Sahu
Summary: The study presents a tunable dual-wavelength Brillouin-bismuth fiber laser with stable dual-wavelength lasing and the potential for low phase noise source for microwave generation, demonstrating tuning capability at different frequency spacings.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jiancheng Deng, Yanxin Li, Ming Shen, Xuewen Shu
Summary: This paper proposes and demonstrates a novel single-frequency erbium-doped random distributed Bragg reflector fiber laser, constructed by a random fiber grating and a high-reflection fiber Bragg grating. The use of femtosecond laser point-by-point inscription technique for the random fiber grating enables easy and low-cost fabrication of long gratings. Experimental results show that the laser achieves stable single-peak emission and operates at a single frequency.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Chien-Hung Yeh, Yu-Ting Lai, Li-Hung Liu, Han-Shin Ko, Yi-Ting Lai, Yi-Chi Chen, Chi-Wai Chow
Summary: This paper presents and investigates an erbium-doped fiber octa-ring laser system with continuous-wave tunability and stable single-longitudinal-mode output. The octa-ring configuration enables mode-filtering based on the Vernier effect, providing dense side-mode suppression and gain extension. The laser's wavelength-tuning bandwidth from 1519.0 to 1575.0 nm is achieved using a conventional C-band EDF gain-medium. Additionally, the output power, stability, optical signal to noise ratio (OSNR), and laser linewidth of the demonstrated EDF laser are discussed.
Article
Engineering, Electrical & Electronic
Yuan Li, Yang Shen, Jiajun Tian, Qi Fu, Yong Yao
Summary: A novel multi-wavelength erbium-doped fiber laser with wavelength switchable capabilities is demonstrated based on PDL modulation and cascaded FBGs as wavelength comb filters. The PDL modulation balances the total loss and lasing gain, allowing for the creation of multiple lasing lines by adjusting PDLs in different wavelengths. The experiment successfully verifies the switching operation for single to four-wavelength laser outputs by adjusting the polarization controllers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Eduarda Pedruzzi, Luis C. B. Silva, Arnaldo G. Leal-Junior, Carlos E. S. Castellani
Summary: In this paper, the experimental generation of a cascaded multi-wavelength Brillouin erbium fiber laser source with low threshold at multiple configurations is demonstrated. These lasers have low loss, high efficiency, and narrow linewidth, making them potential sources for dense wavelength division multiplexing systems.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Optics
H. N. A. Ali, N. Arsad, N. F. Zulkipli, A. H. A. Rosol, M. Yasin, S. W. Harun
Summary: Stimulated Brillouin scattering (SBS) was utilized to achieve Q-switching operation in a multiwavelength Brillouin Erbium fiber laser (BEFL) in the L-band regime. The SBS-based self Q-switched laser employed a 4.5-meter highly nonlinear Erbium-doped fiber (EDF) as the hybrid gain medium to generate multiple wavelength Q-switched pulses at around 1603 nm. By adjusting the input pump power, the repetition rate and pulse width of the laser could be controlled. This is the first experiment to demonstrate a BEFL with Q-switched multi-wavelength output without physical saturable absorber devices.
OPTICS COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Bing Lv, Wentao Zhang, Wenzhu Huang, Fang Li
Summary: A low frequency-noise ring random fiber laser (RFL) based on random Bragg grating array (RBGA) feedback is proposed. The dual-cavity fiber Bragg grating Fabry-Perot (FBG-FP) filter is specially designed to suppress frequency jitter and undesired random lasing modes, achieving stable laser output and reduced frequency noise.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Zhengkang Wang, Jianming Shang, Junsen Yang, Yanfei Xu, Yaojun Qiao, Song Yu
Summary: A high-performance all polarization maintaining (PM) single-longitudinal-mode (SLM) ring cavity Brillouin/Erbium fiber laser with an ultra-narrow linewidth, an ultra-high OSNR and high stability is investigated and experimentally demonstrated. The all-PM structure design and stable distributed feedback fiber laser as the Brillouin pump (BP) improved the output stability of the Brillouin/Erbium fiber laser. The proposed fiber laser achieved a linewidth as narrow as 476 Hz and an optical signal-to-noise ratio as high as 76 dB at certain power levels, with a wavelength stability of 0.004 nm during a 40-minute observation period.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Bo-Yin Wang, Wei-Hung Hsu, Chien-Hung Yeh, Shien-Kuei Liaw, Chi-Wai Chow
Summary: This paper studies a single-longitudinal-mode erbium-doped fiber ring laser that can switch between single- and dual-wavelength output in the C-band. By adjusting cavity and birefringent losses, stable output characteristics are achieved. The laser's output wavelength, detected power, and optical signal to noise ratio (OSNR) are also discussed in detail.
Article
Optics
Yue Tao, Song Zhang, Man Jiang, Can Li, Pu Zhou, Zongfu Jiang
Summary: A 1030 nm single-frequency DFB fiber laser is demonstrated using a 50 mm long fiber Bragg grating inscribed in a Yb-doped glass fiber, achieving both dual-polarization and single-polarization single-frequency operation by twisting the DFB fiber. The laser shows high output power and efficiency, with excellent optical signal to noise ratio at the highest power.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Hao Zhang, Guanzhong Li, Wenchao Qiao, Rong Xu, Hongwen Xuan, Tao Li, Xian Zhao, Aimin Wang, Yizhou Liu
Summary: A 10-kHz, 353-μJ, single-frequency, 574-ns, 1548-nm fiber laser system was demonstrated based on optical pulse modulation. The system used acousto-optic modulators to modulate a seed laser into a pulsed laser, and cascaded fiber amplifiers were used to amplify the pulse energy. The system achieved a peak power of 753W with a pulse duration of 574 ns. Simulations indicated a maximum output power of 3.984W for the customized single-frequency laser.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
