1550nm DFB Fiber Coupled Butterfly Laser Diode Manufacturers

The Chinese Spring Festival Holiday is coming soon, we are very busy, but we still try our best to ship the laser diode on time. Thanks to our colleagues for their joint efforts.

Vertical cavity surface emitting laser is a new generation of semiconductor laser that has been developing rapidly in recent years. The so-called "vertical cavity surface emission" means that the laser emission direction is perpendicular to the cleavage plane or substrate surface. Another emission method corresponding to it is called "edge emission". Traditional semiconductor lasers adopt an edge-emitting mode, that is, the laser emission direction is parallel to the substrate surface. This type of laser is called an edge-emitting laser (EEL). Compared with EEL, VCSEL has the advantages of good beam quality, single-mode output, high modulation bandwidth, long life, easy integration and testing, etc., so it has been widely used in optical communications, optical display, optical sensing and other fields.

The transmission distance of the optical module refers to the distance over which the optical signal can be directly transmitted without relay amplification. It is divided into three types: short-distance, medium-distance, and long-distance. Generally speaking, 2km and below are short distances, 10-20km are medium distances, and 30km, 40km and above are long distances. Optical modules of different wavelengths with different optical fibers correspond to different transmission distances.

Single-frequency lasers based on Er3+-doped or Er3+/Yb3+ co-doped gain fibers mainly work in the 1.5 μm band (C-band: 1530-1565 nm) and part of the L-band (1565-1625 nm). Its wavelength is in the C window of optical fiber communication, which makes the 1.5 μm band single-frequency fiber laser with narrow linewidth and low noise characteristics very important in coherent optical communication. It is used in high-resolution sensing, optical frequency domain reflectometer , laser radar and other fields also have a wide range of applications.