pwm控制大口径VCSEL发射的实验研究

IF 2.4 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Journal Pub Date : 2025-03-19 DOI:10.1109/JPHOT.2025.3571423

Miroslav Slouka;Dalibor Javůrek;Erik Hendrych;Marcel Štofik;Martin Kutáč;Jan Látal

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引用次数: 0

摘要

本研究演示了在大孔径垂直腔面发射激光器（VCSEL）中使用脉宽调制（PWM）进行模式选择。实验结果表明，用1khz PWM脉冲驱动器件可以保持稳定的远场方向图（FFP），并且只产生可以忽略不计的频谱漂移。将PWM频率增加到1mhz，将FFP从高阶的环状横向模式重新分配到中心峰值的类高斯模式，并将主要的纵向共振转移到更短的波长。环绕能量分析量化了这些变化，并证实PWM能够对所选的大孔径VCSEL器件进行精细的空间和光谱发射控制。结果将PWM定位为动态VCSEL发射管理的经济有效且直接的杠杆。

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Experimental Study of PWM-Controlled Emission From a Large-Aperture VCSEL

This study demonstrates the use of pulse-width modulation (PWM) for mode selection in a large-aperture vertical-cavity surface-emitting laser (VCSEL). Experimental results reveal that driving the device with 1 kHz PWM pulses maintains a stable far-field pattern (FFP) and causes only negligible spectral drift. Increasing the PWM frequency up to 1 MHz redistributes the FFP from higher-order, donut-like transverse modes toward a centrally peaked, Gaussian-like mode, and shifts the dominant longitudinal resonance to shorter wavelengths. Encircled energy analysis quantifies these changes and confirms that PWM enables fine spatial and spectral emission control of the selected large-aperture VCSEL device. The results position PWM as a cost-effective and straightforward lever for dynamic VCSEL emission management.

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来源期刊

IEEE Photonics Journal ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

4.50

自引率

8.30%

发文量

489

审稿时长

1.4 months

期刊介绍： Breakthroughs in the generation of light and in its control and utilization have given rise to the field of Photonics, a rapidly expanding area of science and technology with major technological and economic impact. Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum. IEEE Photonics Journal is an online-only journal dedicated to the rapid disclosure of top-quality peer-reviewed research at the forefront of all areas of photonics. Contributions addressing issues ranging from fundamental understanding to emerging technologies and applications are within the scope of the Journal. The Journal includes topics in: Photon sources from far infrared to X-rays, Photonics materials and engineered photonic structures, Integrated optics and optoelectronic, Ultrafast, attosecond, high field and short wavelength photonics, Biophotonics, including DNA photonics, Nanophotonics, Magnetophotonics, Fundamentals of light propagation and interaction; nonlinear effects, Optical data storage, Fiber optics and optical communications devices, systems, and technologies, Micro Opto Electro Mechanical Systems (MOEMS), Microwave photonics, Optical Sensors.