High bit-rate combined FSK/IM modulated optical signal generation by using GCSR tunable laser sources.

Area of Science:

• Photonics and Optical Communications
• Laser Technology
• Modulation Formats

Background:

• Advanced modulation formats are crucial for increasing data rates in optical networks.
• Gain-Clamped Semiconductor Ring (GCSR) lasers offer tunable wavelength capabilities.
• Combining different modulation schemes can enhance spectral efficiency and functionality.

Purpose of the Study:

• To generate and demonstrate a combined Frequency Shift Keying (FSK) and Intensity Modulation (IM) modulation format.
• To utilize Gain-Clamped Semiconductor Ring (GCSR) tunable laser sources for this combined modulation.
• To achieve successful FSK label insertion using a Semiconductor Optical Amplifier-Mach-Zehnder Interferometer (SOA-MZI) wavelength converter.

Main Methods:

• Generating FSK modulation by directly modulating the phase section of a GCSR laser source.
• Experimentally demonstrating the combined FSK/IM modulation at 100 Mbit/s and 10 Gbit/s.
• Employing a SOA-MZI wavelength converter for FSK label insertion.

Main Results:

• Achieved FSK modulation up to 100 Mbit/s.
• Successfully demonstrated the combined FSK/IM modulation format at 100 Mbit/s and 10 Gbit/s.
• Confirmed successful FSK label insertion using the SOA-MZI wavelength converter.

Conclusions:

• The GCSR tunable laser source is effective for generating a combined FSK/IM modulation format.
• This approach supports high-speed optical data transmission and integrated FSK labeling.
• The demonstrated technique offers a promising solution for advanced optical communication systems.