The wavelength of the carrier waves in a modern optical fiber communication network is close to :

Options

A. `2400 nm`
B. `1500 nm`
C. `600 nm`
D. `900 nm`

Answer

To solve the question regarding the wavelength of the carrier waves in a modern optical fiber communication network, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Optical Fiber Communication**:
- Optical fibers are used for transmitting data over long distances using light. They rely on the principle of Total Internal Reflection (TIR) to guide light through the fiber.

2. **Identifying Wavelengths Used**:
- In optical fiber communication, different wavelengths of light can be used as carrier waves. The most commonly used wavelengths in modern optical fiber systems are typically around 1300 nm and 1550 nm.

3. **Focusing on the Given Options**:
- The question asks for the wavelength that is "close to" the carrier wave used in modern optical fiber communication. Among the common wavelengths, 1550 nm is widely recognized as the standard wavelength for long-distance communication due to its low attenuation and high efficiency.

4. **Conclusion**:
- Therefore, the wavelength of the carrier wave in a modern optical fiber communication network is approximately **1500 nm**. This value is often rounded or stated as being in the range of 1550 nm.

### Final Answer:
The wavelength of the carrier waves in a modern optical fiber communication network is close to **1500 nm**.

---