Continuous vs. Pulsed Laser Power
Lasers can work in two main ways: continuous wave or pulsed. Continuous wave lasers give a steady beam with constant power. You use these lasers for jobs that need even energy, like cutting or welding. Pulsed lasers send out short bursts of energy. Each burst has high peak power, but the average power is lower.
| Feature | Continuous Wave Laser | Pulsed Laser |
|---|---|---|
| Output Characteristics | Stable beam, constant power density | Short pulses, changing power density |
| Power Specification | Average power (e.g., 10 watts continuously) | Pulse energy and repetition frequency |
| Peak Power | Lower average power | High peak power, low average power |
| Applications | Uniform energy tasks | Precision, minimal thermal impact |
- Continuous wave lasers are good for long, steady jobs.
- Pulsed lasers give high peak power in short bursts. These are used for jobs that need precision, like cutting or surgery.
To find the peak power of a pulsed laser, use this formula:
Peak Power (P_peak) = Energy per Pulse (E_pulse) / Pulse Duration (Ï„)
For example, if a laser pulse gives 10 millijoules in 10 nanoseconds, the peak power is 1 kilowatt. High peak power lets you cut or shape things quickly and accurately. It also keeps heat from spreading to places you do not want.
Note: Knowing the difference between average power and peak power helps you choose the right laser. You can make your laser safer and better by understanding how each type works.