How to shift the central wavelength of fiber laser to the left

1. First, the central wavelength of the laser can be changed by heating or lowering the temperature of the laser. Different materials have different sensitivity to temperature, so it is necessary to operate according to the specifications of the laser when adjusting the temperature.

2. Secondly, adjusting the laser current can change the gain characteristics of the laser, thus shifting the central wavelength. During the operation, the current should be carefully adjusted to avoid exceeding the safe working range of the laser.

3. Finally, the working wavelength of the laser can be changed by fine tuning the mirror, and the resonant cavity characteristics of the output light can be changed by slightly rotating or adjusting the position of the mirror, thus affecting the central wavelength of the laser to move to the left.