Near-field imaging techniques, at terahertz frequencies (1–10 THz), conventionally rely on
bulky laser sources and detectors. Here, we employ a semiconductor heterostructure laser …

We present a novel method by a multi-longitudinal mode laser with a waveplate to generate
two orthogonally polarized signals with stable and adjustable phase differences. The phase …

Optical rangefinders based on Self-Mixing Interferometry are widely described in literature,
but not yet on the market as commercial instruments. The main reason is that it is relatively …

Self-mixing interferometry is a well established interferometric measurement technique. In
spite of the robustness and simplicity of the concept, interpreting the self-mixing signal is …

Multiple mode gain competition in self-mixing laser diode has been investigated assisted by
output optical spectrum. Experimental results show that multi-peaks appear in self-mixing …

Laser self-mixing is in principle a simple and robust general purpose interferometric method,
with the additional expressivity which results from nonlinearity. However, it is rather sensitive …

Self-mixing interferometry is a measurement approach in which a laser beam is re-injected
into the emitting laser itself after reflection on a target. Information about the position of the …

在半导体激光器自混合干涉(SMI) 微位移测量中, 相位信息的准确提取对于位移的高精度重构至
关重要. 然而, 测量噪声会对SMI 信号引入相位误差, 位移重构精度较低. 针对信号去噪问题 …

Optical feedback in lasers is being used for unconventional imaging of fluid dynamics,
pressure fields, material properties, and free-carrier distribution, especially in spectral …

We discuss and present preliminary experimental evidence of three novel add-on
functionalities that can make Optical Feedback Imaging a truly small footprint and label-free …