Lim Yah Leng, Nikolic Milan, Bertling Karl, Kliese Russell, Rakić Aleksandar D
School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, Australia.
Opt Express. 2009 Mar 30;17(7):5517-25. doi: 10.1364/oe.17.005517.
The advent of two-dimensional arrays of Vertical-Cavity Surface-Emitting Lasers (VCSELs) opened a range of potential sensing applications for nanotechnology and life-sciences. With each laser independently addressable, there is scope for the development of high-resolution full-field imaging systems with electronic scanning. We report on the first implementation of a self-mixing imaging system with parallel readout based on a monolithic VCSEL array. A self-mixing Doppler signal was acquired from the variation in VCSEL junction voltage rather than from a conventional variation in laser power, thus markedly reducing the system complexity. The sensor was validated by imaging the velocity distribution on the surface of a rotating disc. The results obtained demonstrate that monolithic arrays of Vertical-Cavity lasers present a powerful tool for the advancement of self-mixing sensors into parallel imaging paradigms and provide a stepping stone to the implementation of a full-field self-mixing sensor systems.
垂直腔面发射激光器（VCSEL）二维阵列的出现为纳米技术和生命科学开启了一系列潜在的传感应用。由于每个激光器都可独立寻址，因此有开发具有电子扫描功能的高分辨率全场成像系统的空间。我们报告了基于单片VCSEL阵列的具有并行读出功能的自混合成像系统的首次实现。自混合多普勒信号是从VCSEL结电压的变化中获取的，而不是从激光功率的传统变化中获取的，从而显著降低了系统复杂性。通过对旋转圆盘表面的速度分布进行成像，对该传感器进行了验证。所获得的结果表明，垂直腔激光器的单片阵列是将自混合传感器推进到并行成像模式的有力工具，并为实现全场自混合传感器系统提供了一块垫脚石。
