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窄线宽正方形-法布里-珀罗耦合腔激光器(特邀)

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光学学报 2024年第15期44卷 191-197页

作者：绳梦伟王玮肖金龙杨跃德黄永箴中国科学院半导体研究所光电子材料与器件重点实验室北京100083 中国科学院大学材料科学与光电工程中心北京100049

窄线宽半导体激光器在相干光通信领域具有重要的应用,利用较小光限制因子的AlGaInAs/InP外延片,研制了窄线宽的正方形-法布里-珀罗(FP)耦合腔激光器。利用有限元方法仿真了正方形-FP耦合腔的模式特性,采用投影式光刻工艺制备了正方形-F... 详细信息

窄线宽半导体激光器在相干光通信领域具有重要的应用,利用较小光限制因子的AlGaInAs/InP外延片,研制了窄线宽的正方形-法布里-珀罗(FP)耦合腔激光器。利用有限元方法仿真了正方形-FP耦合腔的模式特性,采用投影式光刻工艺制备了正方形-FP耦合腔激光器,激射主模处于1550.5 nm,单模光纤耦合输出功率约为13 mW,边模抑制比约为47 dB。利用延时自零差相干接收方法测量频率噪声,得到洛伦兹线宽为233 kHz。根据实验和仿真结果,激射模式是由正方形微腔的高阶横模和FP模式耦合形成。

关键词：窄线宽正方形微腔耦合腔半导体激光器

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2×4正方形微腔激光器阵列的激射特性

光学学报 2024年第16期44卷 207-212页

作者：王玮陈幼玲杨珂绳梦伟杨跃德肖金龙黄永箴中国科学院半导体研究所光电子材料与器件重点实验室北京100083

制备了以四端口直连波导正方形微腔为基本单元的2×4半导体微腔激光器阵列。上下两排正方形微腔均设计为整体电极以简化实验操作。通过测量不同端口处的输出光谱,每个正方形微腔单元的模式得以识别。进一步地,通过调节注入电流,可以实... 详细信息

制备了以四端口直连波导正方形微腔为基本单元的2×4半导体微腔激光器阵列。上下两排正方形微腔均设计为整体电极以简化实验操作。通过测量不同端口处的输出光谱,每个正方形微腔单元的模式得以识别。进一步地,通过调节注入电流,可以实现模式位置和数量的有效调控。该激光器阵列实现了多路光源的面内集成,为片上大面积集成的微腔激光器提供了可能,并为多端口光源以及全光计算等应用提供了参考。

关键词：激光器半导体激光器阵列二维集成全光计算模式调控

Hybrid-cavity semiconductor lasers with a whispering-gallery cavity for controlling Q factor

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Science China(Information Sciences) 2018年第8期61卷 5-17页

作者： Yongzhen HUANG Xiuwen MA yuede yang Jinlong XIAO Yun DU State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors & College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesChinese Academy of Sciences

Hybrid cavities composed of a Fabry-P′erot(FP) cavity and a whispering-gallery mode(WGM)microcavity have been proposed and demonstrated for modulating mode Q factor to realize single mode and optical bistable lasers. In this article, we report hybrid cavity lasers with a pentagon microcavity and a square microcavity, respectively. The reflectivity spectra of different microcavities are simulated to select microcavities for hybrid cavities. Mode coupling with mode Q factor enhancement is investigated numerically and experimentally. Stable single mode operations with a high coupling efficiency to a single mode fiber are realized for a hybrid cavity laser with a square microcavity. Furthermore, optical bistability hybrid lasers are investigated as the microcavity is unbiased, due to saturable absorption in the microcavity and mode competition, respectively. All-optical flip-flop is demonstrated using trigger optical pulses with a width of100 ps for mode competition bistability. The stable single mode operation and optical bistability of hybrid cavity lasers may shed light on the applications for photonic integrated circuits and optical signal processing.

关键词： optical microcavity semiconductor lasers hybrid cavity optical bistability single mode laser

Global modes and coupled modes for integrated twin circular-side octagon microlasers

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Science China(Information Sciences) 2022年第2期65卷 173-180页

作者： Ke yang yuede yang Youzeng HAO Jiliang WU Yongtao HUANG Jiachen LIU Jinlong XIAO Yongzhen HUANG State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

Whispering-gallery mode(WGM) microlasers are potential light sources for photonic integrated circuits and optical information processing. In this paper, an integrated twin circular-side octagon microlaser(TCOM) composed of two identical circular-side octagon microcavities(COMs) is proposed and demonstrated for realizing lasing mode control. In a TCOM, we found a global mode with the mode field of an "8" pattern(labeled "8" mode) in addition to weak coupling modes of traditional four-bounce modes. The "8" mode belongs to the whole coupled cavity and is insensitive to the refractive index offset of coupled COMs, but the weak coupling modes are strongly sensitive to the refractive index offset. Lasing mode transformation from multiple coupled modes to a single "8" mode is demonstrated by adjusting the refractive index offset through injection currents. Weak coupling modes for directly connected TCOMs and lasing mode control make the COM a potential unit for large-scale photonic integration and optical information processing.

关键词： optical microcavity semiconductor lasers coupled cavity lasing mode control photonic integration

Mode and modulation characteristics for microsquare lasers with a vertex output waveguide

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Science China(Physics,Mechanics & Astronomy) 2015年第11期58卷 28-33页

作者： LONG Heng HUANG YongZhen yang yuede ZOU LingXiu XIAO JinLong XIAO ZhiXiong State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences

The mode and high-speed modulation characteristics are investigated for a microsquare laser with a side length of 16 ?m and a 2-?m-wide output waveguide connected to one vertex. The longitudinal and transverse mode characteristics are analyzed by numerical simulation and light ray model, and compared with the lasing spectra for the microsquare laser. Up to the fifth transverse mode is observed clearly from the lasing spectra. Single mode operation with the side mode suppression ratio of 41 d B is realized at the injection current of 24 m A, and the maximum output power of 0.53(0.18) m W coupled into the multiple(single) mode fiber is obtained at the current of 35 m A, for the microsquare laser at the temperature of 288 K. Furthermore, a flat small-signal modulation response is reached with the 3-d B bandwidth of 16.2 GHz and the resonant peak of 3.6 d B at the bias current of 34 m A. The K-factor of 0.22 ns is obtained by fitting the damping factor versus the resonant frequency, which implies a maximum intrinsic 3-d B bandwidth of 40 GHz.

关键词： microcavity modulation fabrication techniques semiconductor laser

Whispering-gallery microcavity semiconductor lasers suitable for photonic integrated circuits and optical interconnects

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Science China(Technological Sciences) 2009年第12期52卷 3447-3453页

作者： HUANG YongZhen yang yuede WANG ShiJiang XIAO JinLong CHE KaiJun DU Yun State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesPO Box 912Beijing 100083China

The characteristics of whispering-gallery-like modes in the equilateral triangle and square microresonators are introduced,including directional emission triangle and square microlasers connected to an output *** propose a photonic interconnect scheme by connecting two directional emission microlasers with an optical waveguide on silicon integrated circuit *** measurement indicates that the triangle microlasers can work as a resonance enhanced photodetector for optical interconnect.

关键词： optical microcavity microlaser resonance mode optical interconnect

Square microcavity semiconductor lasers

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Chinese Physics B 2018年第11期27卷 176-185页

作者： yuede yang Haizhong Weng Youzeng Hao Jinlong Xiao Yongzhen Huang State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors ＆ College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100083 China

Square microcavities, which support whispering-gallery modes with total internal reflections, can be employed as high-quality laser resonators for fabricating compact, low-threshold semiconductor lasers. In this paper, we review the recent progress of square microcavity semiconductor lasers. The characteristics of confined optical modes in the square microcavities are introduced briefly. Based on the mode properties of the square microcavities, dual-mode lasers with tunable wavelength intervals are realized for generating microwave signals. Furthermore, deformed square microcavity lasers with the sidewalls replaced by circular sides are proposed and experimentally demonstrated to enhance the mode confinement and increase the dual-mode interval to the THz range. In order to further reduce the device size, metal-confined wavelength-scale square cavity lasers are also demonstrated.

关键词： square microcavity whispering-gallery modes semiconductor lasers

Design of unidirectional emission silicon/llI-V laser for on-chip interconnects

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Frontiers of Optoelectronics 2012年第1期5卷 94-98页

作者： Chucai GUO Yongzhen HUANG yuede yang Xiaomeng LV Qifeng YAO State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Optoelectronic Science and Engineering National University of Defense TechnologyChangsha 410073China

We propose a unidirectional emission silicon/ III-V laser, which comprises an III-V quantum wells microdisk connected to an output waveguide and a siliconon-insulator （SOI） waveguide. Characteristics of the III-V microdisk with an output waveguide and mode coupling between the III-V output waveguide and the SO1 waveguide are investigated by three-dimensional （3D） finite-difference time-domain （FDTD） method. Simulation results show that the Q factor of a coupled mode for a 7.5 μm diameter microdisk connected to a 0.5 μm wide output waveguide is about 8.5×10^4. And the coupling efficiency between the III-V output waveguide and the SO1 waveguide is over 96% when the III-V waveguide width is 0.5 μm, the SO1 waveguide width is 0.565 μm and the vertical gap between those two waveguides is 0.1μm. The proposed hybrid laser would be of valuable applications for on-chip interconnects.

关键词： silicon/III-V laser unidirectional emission,three-dimensional (3D) finite-difference time-domain(FDTD) method on-chip interconnects

Investigation of mode radiation loss for microdisk resonators with pedestals by FDTD technique

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Chinese Optics Letters 2010年第5期8卷 502-504页

作者：杨跃德王世江黄永箴 State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences

Mode radiation loss for microdisk resonators with pedestals is investigated by three-dimensional（3D） finite-difference time-domain（FDTD） *** the microdisk with a radius of 1μm,a thickness of 0.2μm,and a refractive index of 3.4,on a pedestal with a refractive index of 3.17,the mode quality（Q） factor of the whispering-gallery mode（WGM） quasi-TE_（7.1） first increases with the increase of the radius of the pedestal,and then quickly decreases as the radius is larger than 0.75μ*** mode radiation loss is mainly the vertical radiation loss induced by the mode coupling between the WGM and vertical radiation mode in the pedestal,instead of the scattering loss around the perimeter of the round *** WG M can keep the high Q factor when the mode coupling is forbidden.

关键词： Finite difference time domain method Light refraction Refractive index Refractometers Resonators Three dimensional