Effect of Laser Parameters on Optical Stealth Transmission System Performance

Area of Science:

• Optical Engineering
• Communications Systems
• Signal Processing

Background:

• Optical stealth transmission systems are crucial for secure communications.
• System performance is significantly influenced by gain-switched laser parameters.

Purpose of the Study:

• To investigate the impact of laser parameters on optical stealth transmission.
• To analyze the trade-off between covertness and bit error rate (BER).

Main Methods:

• Utilized a gain-switched laser for optical stealth carrier generation.
• Employed time spreading and all-optical complementary encoding.
• Simulated system performance by varying modulation frequency, bias current, and modulation current.

Main Results:

• Adjusting laser parameters alters temporal and spectral characteristics of stealth signals.
• A direct trade-off exists between BER performance and stealth channel covertness.
• Optimized covertness achieved by reducing bias current and modulation frequency, and increasing modulation current.

Conclusions:

• Laser parameter tuning is essential for effective optical stealth transmission.
• Achieving optimal covertness requires careful adjustment of bias current, modulation current, and modulation frequency.
• Error-free transmission can be maintained while enhancing stealth capabilities.