Definition: The pump power when the laser oscillation threshold is reached.

Lasers can be classified by pumping method, gain medium, operating method, output power, and output wavelength.

What is Lidar (LiDAR)? Lidar combines radar ranging capabilities with camera angular resolution to provide accurate depth-aware sensing to complete the image (Figure 1).

Optical fiber array, using a V-groove (V-Groove) substrate, a bundle of optical fibers or an optical fiber ribbon is installed on the substrate at specified intervals to form an array.

Definition: The gain medium is doped with transition metal ions.

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...

The eye diagram is a series of digital signals accumulated and displayed on the oscilloscope. It contains a wealth of information. From the eye diagram, the influence of intersymbol crosstalk and noise can be observed, which reflects the overall characteristics of the digital signal, so as to estimate the system optimization. Therefore, eye diagram analysis is the core of signa...

Definition: An amplifier with multiple channels in a gain medium. The gain medium of an optical amplifier can only achieve a limited gain. One approach achieves higher gain by geometrically setting up light so that it passes through multiple channels as it passes through the amplifier, known as a multipass amplifier. The simplest is a two-pass amplifier, where the beam passes t...