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RISS 인기검색어
- 검색키워드
- 저자 : Lanling Lan (검색결과 3 건)
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300-W-class Side-pumped Solar Laser
Hongfei Qi,Lanling Lan,Yan Liu,Pengfei Xiang,Yulong Tang 한국광학회 2022 Current Optics and Photonics Vol.6 No.6
To realize uniform side pumping of solar lasers and improve their output power, a solar concentrating system based on off-axis parabolic mirrors is proposed. Four identical off-axis parabolic mirrors with focal length of 1,000 mm are toroidally arranged as the primary concentrator. Four two-dimensional compound parabolic concentrators (2D-CPCs) are designed as a secondary concentrator to further compress the focused spot induced by the parabolic mirrors, and the focused light is then homogenized by four rectangular diffusers and provides uniform pumping for a laser-crystal rod to achieve solar laser emission. Simulation results show that the solar power received by the laser rod, uniformity of the light spot, and output power of the solar laser are 7,872.7 W, 98%, and 351.8 W respectively. This uniform pumping configuration and concentrator design thus provide a new means for developing high-power side-pumped solid-state solar lasers.
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Design of a Fresnel Lens for a Solar End-pumped Solid-state Laser
Mingyu Ou,Pian Hu,Lanling Lan,Yan Liu,Jun Zhou,Xiaotao Shi 한국광학회 2020 Current Optics and Photonics Vol.4 No.5
A novel design for a Fresnel lens for a solar end-pumped laser is demonstrated in this paper. The new hybrid Fresnel lens includes two parts, inner and outer. The inner part is a twice-total-internal-reflection and vertical-transmission lens. The outer part is a once-total-reflection and vertical-transmission lens. The radius of the Fresnel lens is 600 mm, and its focal length is 750 mm. The concentrating performance of the Fresnel lens is examined using TracePro. The results show that the concentration efficiency has been greatly improved. The total concentration efficiency of the hybrid Fresnel lens reaches 73.2% when the radius of the laser rod is 3 mm. This design can simplify the concentration system of a solar endpumped solid-state laser.
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Regenerative Er-doped Fiber Amplifier System for High-repetition-rate Optical Pulses
Yan Liu,Kan Wu,Nanxi Li,Lanling Lan,Seongwoo Yoo,Xuan Wu,Perry Ping Shum,Shuguang Zeng,Xinyu Tan 한국광학회 2013 Current Optics and Photonics Vol.17 No.5
A regenerative Er-doped fiber amplifier system for a high-repetition-rate optical pulse train is investigated for the first time. A signal pulse train with a wavelength tuning range of 18 nm is produced by a passive mode-locked fiber laser based on a nonlinear polarization rotation technique. In order to realize the amplification, an optical delay-line is used to achieve time match between the pulses’ interval and the period of pulse running through the regenerative amplifier. The 16 dB gain is obtained for an input pulse train with a launching power of -30.4 dBm, a center wavelength of 1563.4 nm and a repetition rate of 15.3 MHz. The output properties of signal pulses with different center wavelengths are also discussed. The pulse amplification is found to be different from the regenerative amplification system for CW signals.
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