Related Experiment Video
Updated: Dec 23, 2025
08:48
Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
7.9K
Widely Tunable Single/Dual RF Signal Generation by a Monolithic Three-Section DFB Laser
Chung-Ping Huang1, Yu-Ming Huang2, Hsiang-Yun Shih2
1Institute of Lighting and Energy Photonics, College of Photonics, National Chiao-Tung University, Tainan, Taiwan.
Nanoscale Research Letters
|April 19, 2020
Summary
A novel three-section distributed feedback laser demonstrates enhanced microwave generation, achieving a wider tuning range for radio-over-fiber applications. This compact laser design offers improved performance over traditional two-section lasers.
Area of Science:
- Optoelectronics
- Photonics
- Microwave Engineering
Background:
- Distributed feedback (DFB) lasers are crucial for generating tunable microwave signals.
- Enhancing the radio frequency (RF) tuning range and exploring multi-signal generation are key research areas.
Purpose of the Study:
- To fabricate and analyze a three-section DFB laser for its microwave generation capabilities.
- To investigate the impact of a third section on RF signal tuning range and dual-signal operation.
Main Methods:
- Fabrication of a three-section InP/air distributed Bragg reflector (DBR) laser.
- Analysis of microwave generation using optical heterodyning.
- Comparison of tuning range with a two-section laser design.
Main Results:
- Achieved a widely tunable single RF signal with a tuning range from 2 to 45 GHz.
- Demonstrated dual RF operation possibility with three emission peaks.
- Observed a 21.3% enhancement in RF tuning range compared to a two-section laser (42.81 GHz vs. 35.29 GHz).
Conclusions:
- The three-section DFB laser offers significantly improved RF tuning range.
- The design is suitable for dual RF signal generation.
- The device's compactness makes it promising for future radio-over-fiber systems.
