Controlling the Spectral Persistence of a Random Laser Research Background Since their theoretical proposal by Letokhov in the 1960s, Random Lasers (hereinafter referred to as RLs) have gradually become a widely researched field. A significant feature of RLs is that they do not require precisely manufactured optical cavities, which gives them consi...
Special Report: Pound–Drever–Hall Feedforward Technique: Laser Phase Noise Suppression Beyond Feedback Authors: Yu-Xin Chao, Zhen-Xing Hua, Xin-Hui Liang, Zong-Pei Yue, Li You, Meng Khoon Tey Institution: State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China Journal: Optica Publication D...
Research Report on Hybrid Integrated Ultra-Narrow Linewidth Self-Injection Locking 780nm Laser Background In modern technology, narrow linewidth lasers play an essential role in various applications, including classical and quantum sensing, ion trap systems, positioning/navigation/timing systems, optical clocks, and microwave frequency synthesizers...
Research on Interferometric Scattering Microscopy and Spatial Coherence Control for Multiparticle Tracking Background Introduction Interferometric Scattering (iSCAT) microscopy has demonstrated unparalleled performance in the field of label-free optical imaging, especially in the detection and imaging of isolated nanoparticles and molecules. Howeve...
Background Introduction Photon integrated circuits (PICs) are significant for achieving high-speed data transmission. However, traditional photon integrated circuits, which only use a single plane or a limited number of stacked planes, are restricted in optical signal routing. Additionally, coupling losses need to be as low as possible for practica...
Observation of Inter-Band Kelly Sidebands in Coupled Ring Comb Microcombs Background Introduction Kelly Sidebands (KSS) are special dispersive waves that appear in mode-locked systems and have been extensively studied in fiber lasers. However, due to the shorter path lengths of integrated photonics microresonators, their generation in integrated mi...
High-Speed High-Power Free-Space Optical Communication: Direct Modulation of Watt-Level Photonic Crystal Surface-Emitting Lasers Background Introduction As a vital light source for optical communication, semiconductor lasers are widely used due to their small size, low cost, long lifespan, and high efficiency. For example, vertical-cavity surface-e...
Hyperspectral In-Memory Computing and Applications of Optical Frequency Comb and Programmable Optical Memory Introduction In recent years, breakthroughs in machine learning have driven revolutionary developments in various industries, including healthcare, finance, retail, automotive, and manufacturing. These transformations have led to a surge in ...
Research Report on the Realization of Blue-Ultraviolet Light Mode-Locking by Polariton Waveguides In the field of modern optoelectronics, continuous advancements in laser technology have greatly propelled the development of information technology, biomedicine, and industrial processing, among other sectors. Mode-locked laser technology, in particul...
Requirement for Orbital Angular Momentum Comb Modes in Digital Lasers Research Background and Significance With the rapid advancement of information technology, the demand for high-capacity data transmission has become increasingly stringent. Orbital angular momentum (OAM) of light, due to its inherently infinite dimensions, is considered a potenti...