Light source based on tunable laser

A tunable laser-based light source for Li-Fi communication comprises a laser (1), a first optical element (3) and a second optical element (4). The first optical element (3) is configured to reflect and/or refract the scanning light beam (2) emitted from the laser (1). The second optical element (4) is configured to widen the scanning light beam (2) reflected/refracted by the first optical element (3). The scanning beam (2) is configured to scan a scanning region extending in the widening direction (S1) by a first scanning length and in the scanning direction (S2) by a second scanning length. The second optical element (4) is configured to widen the scanning beam (2) in a widening direction (S1) to a width greater than the first scanning length, and the laser (1) and the first optical element (3) are configured to cooperate to enable the scanning beam (2) to sweep along the scanning direction (S2). 一种用于Li-Fi通信的基于可调激光器的光源，包括激光器（1）、第一光学元件（3）和第二光学元件（4）。第一光学元件（3）被配置成反射和/或折射从激光器（1）发射的扫描光束（2）。第二光学元件（4）被配置成加宽由第一光学元件