Epitaxial growths of the GaAs/AlGaAs-based 940 nm infrared light emitting diodes (LEDs) with dual junctions were carried out by using metalorganic chemical vapor deposition (MOCVD) with different doping concentrations and Al contents in AlxGa1-xAs compoun
A method for beam diffraction sidelobe suppression based on the combination of volume Bragg gratings (VBGs) with different thicknesses or periods for angular filtering is proposed and performed. Simulated and experimental results show that the beam diffra
A noise-sidebands-free and ultra-low relative intensity noise (RIN) 1.5 μm single-frequency fiber laser is demonstrated for the first time to our best knowledge. Utilizing a self-injection locking framework and a booster optical amplifier, the noise sideb