Author Affiliations
Abstract
1 Department of Electronic Engineering, School of Information Science and Engineering, Xiamen University, Xiamen 361005, China
2 School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China
We demonstrate a dual-wavelength passively Q-switched Nd3+-doped glass fiber laser using a few-layer topological insulator Bi2Se3 as a saturable absorber (SA) for the first time, to the best of our knowledge. The laser resonator is a simple and compact linear cavity using two fiber end-facet mirrors. The SA is fabricated by Bi2Se3/polyvinyl alcohol composite film. By inserting the SA into the laser cavity, a stable Q-switching operation is achieved with the shortest pulse width and maximum pulse repetition rate of 601 ns and 205.2 kHz, respectively. The maximum average output power and maximum pulse energy obtained are about 6.6 mW and 38.8 nJ, respectively.
060.3510 Lasers, fiber 140.3540 Lasers, Q-switched 140.3530 Lasers, neodymium Chinese Optics Letters
2018, 16(2): 020016
Author Affiliations
Abstract
1 Department of Electronic Engineering, Xiamen University, Xiamen 361005, China
2 Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China
3 Shenzhen Research Institute of Xiamen University, Shenzhen 518057, China
The direct generation of passively Q-switched lasers at a green wavelength has rarely been investigated in the past. In this Letter, we demonstrate a passively Q-switched praseodymium-doped yttrium lithium fluoride green laser at 522 nm using CdTe/CdS quantum dots as a saturable absorber. A maximum average output power of 33.6 mW is achieved with the shortest pulse width of 840 ns. The corresponding pulse energy and peak power reached 0.18 μJ and 0.21 W, respectively. To the best of our knowledge, this is the first demonstration in regard to a quantum dots saturable absorber operating in the green spectral region.
140.3480 Lasers, diode-pumped 140.3540 Lasers, Q-switched Chinese Optics Letters
2018, 16(2): 020005
Author Affiliations
Abstract
The non-local optical interaction of two semiconductor microdisks with a waveguide bridged at radial direction is proposed and studied by three dimensional finite-difference time-domain (FDTD) electromagnetic simulations. The strong and weak optical interactions between two microdisks are observed and ascribed to the internal coupled modes with different coupling ratios. The vertical radiation losses and the related mode quality factors are modulated by waveguide length and present oscillation characteristics for the resonant modes. In addition, the optical leakage of coupling system is affected by the etching depth of disks due to the emission of minor components of electric field.
140.4780 Optical resonators 230.4555 Coupled resonators 140.3945 Microcavities Chinese Optics Letters
2014, 12(7): 071401
1 厦门大学电子工程系, 福建 厦门 361005
2 法国卡昂大学材料与光电离子研究中心, 卡昂 法国 14050
报道了蓝光半导体激光抽运的掺镨氟化钇锂（Pr:YLF）橙光607 nm固体激光器。光抽运半导体激光器（OPSL）与激光二极管（LD）相比具有光束质量好、输出功率高、吸收效率高等优点，因此采用OPSL作为抽运源有助于提高Pr:YLF激光器性能。分别测量了Pr:YLF在橙光波段内常温（300 K）和低温（12 K）时的偏振发射光谱，表明该晶体的橙光3P0→3H6跃迁主要包含6条发射谱线。采用最高输出功率为1.9 W，中心波长为479.2 nm的OPSL作为抽运源，以及长度为5 mm、掺杂原子数分数为0.5%的Pr:YLF晶体作为增益介质，在平凹腔结构下获得的橙光607 nm最大输连续输出功率为524 mW，对应斜率效率为39.1%。
激光器 橙光激光器 掺镨氟化钇锂晶体 光抽运半导体激光器 中国激光
2013, 40(s1): s102004
报道了蓝光激光二极管(LD)(中心波长约为444 nm)单端纵向抽运掺镨氟化钇锂（Pr3+:YLF）的红光（640 nm）和绿光（522 nm）激光器。用单个棱镜作为抽运光束整形器，实验中红光最高输出功率为308.5 mW，其相应的抽运阈值功率为46 mW，斜率效率为47.5%；绿光这三个指标的值相应分别为193.4 mW、162.3 mW和37.1%。结果表明抽运光的整形提升了红、绿光的输出特性。
激光器 可见光激光器 端面抽运 掺镨氟化钇锂晶体 蓝光激光二极管 中国激光
2013, 40(12): 1202002
