NakuLaser Blog

 SLD is an optical device that can provide output equivalent to LD ( Laser Diode ) and low coherence equivalent to LED (Light Emitting Diode ), and has a wider spectral width. Because SLDs reduce coherent noise and achieve high-precision measurement, they can be used in a wide range of sensing fields, including photo application measurement and medical imaging. Comparison of SLD and LD/LED characteristics The following table provides the performance comparison of SLD and LD/LED. SLD working principle The working principle of SLD includes generating spontaneous emission light, then amplifying and outputting light with optical gain in the active layer. The figure below schematically illustrates this. The spectral width of SLD is wider than that of stimulated emission light (such as LD light). However, since spontaneous emission light such as LED light is amplified by optical gain having a limited bandwidth, the spectral width of the SLD is narrower than that of the LED. As shown he...

The ASE source  is designed for production and laboratory experiments. The main body of the light source is a gain medium erbium doped fiber and a high performance pump laser. The SLED light source is a semiconductor light emitting device including a semiconductor light emitting diode (LED), a digital tube, a symbol tube, a meter tube, and a dot matrix display (referred to as a matrix tube). In fact, each of the digital tube, the symbol tube, the meter tube, and the matrix tube is a light emitting diode.Main applications: LED lighting fixtures ,  landscape street lights , billboards , TV , LCD , i nformation screen, etc. In terms of spectral shape, ASE is a rectangular spectrum, and SLED is a Gaussian spectrum. In principle, ASE is the pump source that excites the erbium-doped fiber to generate spontaneous radiation, and SLED is the laser generated spontaneously by the laser diode. The SLED light source has the characteristics of high output power and wide cover...