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Investigations of a 439 W Narrow-Linewidth Er/Yb Fiber Amplifier Pumped by 1018 nm Fiber Lasers
Guanzhong Li;Dan Li;Yuexuan Cai;Guohao Fu;Weilong Yu;Pei Li;Qirong Xiao;Mali Gong;Ping Yan
Journal of Lightwave Technology
Year: 2024 | Early Access Article |
In this paper, a 439 W, 1567 nm, narrow-linewidth Er/Yb co-doped fiber (EYDF) laser system pumped by 1018 nm fiber lasers is demonstrated. The 1018 nm fiber lasers are utilized as pumping source to suppress the ∼1 μm amplified spontaneous emission. It is the highest output power reported for EYDF lasers to date. A novel EYDF model considering the pair-induced quenching (PIQ) and the excited state ...Show More
Design and Experimental Investigation of Three Degrees of Freedom Nanoscale Microsuspension Actuators
Nanoscale actuators are one of the key technologies in high-precision servo systems. For optical storage systems, the performance of the actuator determines the maximum storage capacity and read/write speed. This article introduces a three-degrees of freedom nanoscale microsuspension actuator. Compared with an actuator from a traditional optical storage system, the proposed actuator can hold dual ...Show More
All-fiber scan-free precision detection with large depth of field
2022 Conference on Lasers and Electro-Optics (CLEO)
Year: 2022 | Conference Paper |
Single-pixel high-speed imaging through a multimode fiber
2022 Conference on Lasers and Electro-Optics (CLEO)
Year: 2022 | Conference Paper |
Kilowatt-Level Supercontinuum Generation in Random Raman Fiber Laser Oscillator With Full-Open Cavity
Tiancheng Qi;Yousi Yang;Dan Li;Ping Yan;Mali Gong;Qirong Xiao
Journal of Lightwave Technology
Cited by: Papers (10)
High-power supercontinuum (SC) sources are important for remote sensing, homeland defense, and scientific research. Despite recent advances in power scaling of the SC generation in optical fibers, the power record of SC fiber laser sources is still much lower than conventional high-power fiber lasers. Here we demonstrate a method for kilowatt-level SC generation based on the random Raman fiber las...Show More
10 kW Fiber Amplifier Seeded by Random Fiber Laser With Suppression of Spectral Broadening and SRS
Shanshan Du;Tiancheng Qi;Dan Li;Ping Yan;Mali Gong;Qirong Xiao
IEEE Photonics Technology Letters
Cited by: Papers (16)
A 10 kW fiber amplifier seeded by the random fiber laser (RFL) with 1018 nm tandem-pumping scheme is reported in this letter. The amplified RFL centered at 1085 nm is seeded by the RFL with a full-open cavity. An array of chirped and tilted fiber Bragg gratings placed before the main amplifier prevent the stimulated Raman scattering with a suppression ratio of 55.8 dB. Control experiments prove th...Show More
6.85 kW Ytterbium-Raman Fiber Amplifier Based on Adjustable Raman Threshold Method
Tiancheng Qi;Dan Li;Zehui Wang;Lele Wang;Weilong Yu;Ping Yan;Mali Gong;Qirong Xiao
Journal of Lightwave Technology
Cited by: Papers (8)
To achieve a high spectral purity Raman laser in a wide range of pump power, we propose the adjustable Raman threshold method and experimentally demonstrate a 6.85 kW ytterbium-Raman (Yb-Raman) fiber amplifier in this paper. The Raman threshold is adjusted to coordinate with pump power level via manipulating the Raman proportion from the master oscillator. The spectral purity of Raman laser at 112...Show More
Arbitrary designer mode convertor and on-chip OAM generator with configurable topological charge using waveguide-integrated metasurface
Yuan Meng;Tiantian He;Zhoutian Liu;Futai Hu;Qirong Xiao;Mali Gong
2021 Conference on Lasers and Electro-Optics (CLEO)
Year: 2021 | Conference Paper |
Leveraging waveguide-integrated metasurface platform, designer mode convertors capable of exclusively exciting arbitrary high-order modes with high-purity reaching 98% are proposed. We also report on-chip scalable broadband vortex-beam-generators with configurable topological charge from -3 to +3.Show More
5.1 kW Tandem-Pumped Fiber Amplifier Seeded by Random Fiber Laser With High Suppression of Stimulated Raman Scattering
Zehui Wang;Weilong Yu;Jiading Tian;Tiancheng Qi;Dan Li;Qirong Xiao;Ping Yan;Mali Gong
In this work, high-power tandem-pumped random fiber lasers are investigated in detail. A 6.5 W random fiber laser seed centered at 1070 nm with a half-open cavity structure was built. Boosted by two amplifier stages, the random fiber laser achieved a power of several kilowatts. Stimulated Raman scattering (SRS) mitigation is challenging in tandem-pumped fiber lasers. To suppress SRS, several metho...Show More
In this paper, we propose an independent neural network for single image super-resolution by residual recovery. The network is inspired by the observation that there still exists image residuals between the low-resolution image and the downsampled high-resolution output obtained by a previously proposed super-resolution network. Based on this observation, we design a simple but effective deep conv...Show More
On-Chip Mode-Controlled Waveguiding and Versatile Multi-Wavelength Light Routing using Chip-Integrated Dielectric Metasurface for Arbitrary Polarizations
Yuan Meng;Zhoutian Liu;Ride Wang;Tiancheng Qi;Futai Hu;Qiang Wu;Qirong Xiao;Sang-Hoon Bae;Hyunseok Kim;Mali Gong
2020 Conference on Lasers and Electro-Optics (CLEO)
Year: 2020 | Conference Paper |
A comprehensive design strategy using waveguide-integrated-metasurface is proposed for versatile on-chip light-coupling. The coupling-direction, operation-wavelength and excited-mode-type are configurable at will for arbitrary polarizations, with high efficiency of 67% and directivity over 20 dB.Show More
Chip-Scale Mode-Configurable Light Couplers and Vortex Beam Generators using Waveguide-Integrated Metasurface
Yuan Meng;Zhoutian Liu;Zhenwei Xie;Futai Hu;Tiancheng Qi;Qirong Xiao;Hyunseok Kim;Sang-Hoon Bae;Xing Fu;Mali Gong;Xiaocong Yuan
2020 Conference on Lasers and Electro-Optics (CLEO)
Year: 2020 | Conference Paper |
Integrated mode-selective on-chip couplers are reported using Si-nanoantennas-patterned Si3N4 waveguide. A chip-integrated twisted-light generator coupling free-space light into optical vortex carrying 1ħ OAM is numerically demonstrated, by engineering spatial modal-overlap & controlled mode mixing.Show More
An Efficient Non-Invasive Method to Fabricate In-Fiber Microcavities Using a Continuous-Wave Laser
Qirong Xiao;Jiading Tian;Dan Li;Yusheng Huang;Zehui Wang;Ping Yan;Mali Gong
IEEE Photonics Technology Letters
Cited by: Papers (1)
In-fiber microcavities are usually fabricated by inva-sive methods that require costly setups and time-consuming processes. Inspired by the fiber fuse effect, we propose an efficient non-invasive method to fabricate in-fiber microcavities. The setup of the method was economic, using a watt-level continuous-wave laser. Spherical in-fiber microcavities of ~hundred-of-micron sizes could be fabricated...Show More
Single-Photon Detection Approach for Autonomous Vehicles Sensing
Robustness to interference and low energy consumption are two important issues hindering development of laser-sensing technology for autonomous driving. In this paper, we propose and present an all-in-one sensing solution based on single-photon-detector (SPD) for autonomous driving to address those issues. Incorporating one laser source and several SPDs, the proposed solution is capable of collisi...Show More
1535–1620 nm Widely Tunable Watt-Level Single-Mode Er:Yb Codoped All-Fiber MOPA
Ping Yan;Weilong Yu;Zehui Wang;Jiading Tian;Zhoutian Liu;Dan Li;Qirong Xiao;Mali Gong
IEEE Photonics Technology Letters
Cited by: Papers (5)
We report a continuous-wave 1535-1620 nm widely tunable single-mode Er:Yb codoped cladding-pumped all-fiber laser source based on the MOPA scheme. The output power ranged from 0.785 W (at 1615 nm) to 2.007 W (at 1565 nm), which is the highest output power from a C+L tunable all-fiber laser source. The 3 dB spectral width was less than 150 pm at all wavelengths. No Yb emission was observed. We prop...Show More
Tandem-Pumped High-Power Narrow-Linewidth Fiber Laser Tunable From 1060–1090 nm
Jiading Tian;Qirong Xiao;Dan Li;Yusheng Huang;Zehui Wang;Zhihua Huang;Ping Yan;Mali Gong
Journal of Lightwave Technology
Cited by: Papers (9)
Tandem pumping is a promising technique for gaining higher power from ytterbium-doped fiber (YDF) lasers. However, the characteristics of tandem pumped laser light, especially their variation with the lasing wavelengths, were not thoroughly investigated. We investigated the characteristics with the first 1018-nm tandem-pumped high-power tunable YDF laser. The 1018-nm tandem pumping was not applica...Show More
An Efficient 4-kW Level Random Fiber Laser Based on Tandem-Pumping Scheme
Zehui Wang;Ping Yan;Yusheng Huang;Jiading Tian;Chao Cai;Dan Li;Yongqing Yi;Qirong Xiao;Mali Gong
In this paper, we presented a monolithic high power random fiber laser with a tandem-pumping scheme. The random fiber laser seed centered at 1064 nm was pumped by a 1018 nm fiber laser and reached an output power of 8.66 W. After the two amplifiers, the seed was amplified to 4020 W and the 3 dB width of laser spectrum was broadened from 0.78 nm to 0.99 nm. To increase the efficiency of the 4 kW la...Show More
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