An optical power meter (OPM) doesn't have a single "wavelength" of its own; instead, it's designed to measure the power of light at various wavelengths. However, OPMs are optimized to accurately measure light at specific wavelengths commonly used in fiber optic systems. Here's a breakdown of the key wavelengths:
Common Wavelengths for Optical Power Meters
| Wavelength (nm) | Application |
|---|---|
| 850 nm | Short-distance applications, such as local area networks (LANs). |
| 1300 - 1310 nm | Medium-distance applications, such as in data centers. |
Why Specific Wavelengths?
Optical power meters are designed to work most accurately within these ranges because:
- Fiber Optic Transmission: These wavelengths are the most efficient for transmitting light through optical fibers. The attenuation, or loss of signal, is relatively low at these wavelengths.
- Common System Standards: The wavelengths listed above are standards adopted for different fiber optic applications. OPMs are designed to meet these standards.
- Component Optimization: Fiber optic transmitters, receivers, and other components are designed to operate at these specific wavelengths. OPMs align with this system design.
Key Points to Remember
- OPMs measure power, not wavelengths: An OPM itself doesn't have a wavelength; it measures the power of light at different wavelengths.
- Calibration is Key: Accurate readings depend on OPM calibration for the desired wavelength.
- Application-Specific: The appropriate OPM to use depends on the application (short, medium or long distance).
In conclusion, an optical power meter is designed to measure the power of optical signals at specific wavelengths, primarily 850 nm for short-distance applications and 1300-1310 nm for medium-distance applications.
