As a new type of light source, semiconductor lasers have been widely used in communications, military, and medical fields. In different fields, semiconductor lasers either operate in constant current mode, or work in constant power mode, or work in DC mode, or work in AC mode. This article describes a non-temperature-controlled semiconductor laser driver in multi-mode operation, which can operate in different modes and can be switched freely. In constant current mode, FPGA can linearly adjust the driver current of semiconductor laser, and the goodness of fit of trend line is 0.999 77, which has excellent linearity. This current can also be modulated to generate sine waves, square waves, and triangle waves. The relative error of the generated waveform frequency is controlled in the order of 10-5 magnitude; In constant power mode, the FPGA can stabilize the laser output power in both DC and AC conditions. Under long-term testing, the relative standard deviation of output power is 0.209% when the laser is driven by DC and 0.275% when the laser is driven by AC. All operations can be controlled wirelessly via the host computer interface, maximizing ease of use and flexibility.