Optical fiber communication experiment at 5 Gbit/sec

Area of Science:

• Optoelectronics
• Telecommunications Engineering
• Materials Science

Background:

• Optical fiber communication systems are crucial for high-speed data transmission.
• Advancements in laser technology and receiver components are key to increasing data rates.
• Previous experiments have explored various laser types and fiber optic configurations.

Purpose of the Study:

• To investigate the feasibility of high-speed optical fiber communication.
• To evaluate the performance of different laser types (BH and TJS) at high data rates.
• To assess the overall system performance including fiber coupling and receiver sensitivity.

Main Methods:

• Conducted a Gbit/sec optical fiber communication experiment using a 500-m single-mode fiber.
• Employed a Buried Heterostructure (BH) laser and a Twin-Guide Structure (TJS) laser for transmission.
• Utilized a Silicon avalanche photodiode receiver with a 10-Gbit/sec GaAs MESFET AND gate.

Main Results:

• Achieved a maximum transmission speed of 3 Gbit/sec with the BH laser.
• Reached a maximum transmission speed of 5 Gbit/sec with the TJS laser.
• Minimum coupling loss of 10 dB was observed with butt-end coupling.
• Bit-error rates (BER) below 10(-9) were recorded at 5 Gbit/sec.

Conclusions:

• The TJS laser enables optical fiber communication at 5 Gbit/sec.
• The experimental setup, including the Si-avalanche photodiode and GaAs MESFET gate, supports high-speed data rates.
• The results validate the practical feasibility of optical fiber transmission at 5 Gbit/sec.