Conservation of energy is the basic principle of physics and the basis for repairing lasers. One of the most common problems with laser pointer is that the output power is not up to standard or there is no output. So, is the power supply normal? (Check the power supply) Is there any pump light shining on the active device? (Measure the optical power at the detection point) At each link, if there is sufficient energy input, there must be enough energy output, accompanied by normal losses.
Recalling the physics of the 20th century, the uncertainty relationship tells us the limits of frequency bandwidth and pulse duration (especially pulsed lasers with picoseconds or shorter); Kerr effect, Raman effect and a series of nonlinear effects make Ultrashort pulses (tens of femtoseconds) are possible and can be used in many spectroscopy techniques. Entropy is a basic concept in physics, and it is often involved in laser systems. For example, it can explain why dust is everywhere. With the help of Murphy’s law, it can be explained that any small dust or pollutant will always fall (and destroy) the most expensive component in the system.
When facing customers, you are likely to face all of the above challenges, and at the same time, you need to understand from the user ’s perspective how users want to use this laser, what difficulties they face, and what is theirs when they complete the experiment. Really needed. A red laser pointer that stably generates a laser according to specific parameters is only a good start. Only when the user’s desired effect is achieved is it a real success, such as assembling it into a device or using it to complete a new scientific discovery.
In short, there are still a lot of positions in the laser industry that are reserved for people with multidisciplinary backgrounds. A person who has received physics training and mastered multidisciplinary knowledge has laid a solid foundation for becoming a specialist in a certain professional field in the future, or he may become an all-rounder and an expert in solving various problems.