Semiconductor superluminescent diode (SLD) is a incoherent light source based on amplified spontaneous emission, with optical characteristics between semiconductor lasers and light-emitting diodes. SLD has the advantages of high power, wide spectrum, weak temporal coherence, and high fiber coupling efficiency, making it an ideal core light source for incoherent optical systems. Widely used in fiber optic gyroscopes (FOG), optical coherence tomography (OCT), optical time domain reflectometry, wavelength division multiplexing systems, and tunable external cavity lasers, SLD can provide high-precision measurement and high-resolution imaging, promoting continuous progress and innovation in technologies such as optical communication, precision measurement, and optical imaging. Yichen Lashuo not only supplies a variety of independently developed specifications of semiconductor superluminescent diodes (SLDs), but also provides customized services according to customer needs.