Related Experiment Video
Updated: Jun 10, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Tunable directly modulated fiber ring laser using a reflective semiconductor optical amplifier for WDM access
Zih-Rong Lin1, Cheng-Kuang Liu, Yu-Jhu Jhang
1Department of Electronic Engineering, National Taiwan University of Science and Technology, 43, Keelung Rd., Sec. 4, Taipei, Taiwan 106, China.
Optics Express
|August 20, 2010
Summary
A new tunable directly modulated fiber ring laser (TDMFRL) was developed for bidirectional access networks. This laser supports downstream data and acts as a light source for subscriber-site lasers, enabling WDM network performance.
Area of Science:
- Optical Engineering
- Telecommunications Engineering
- Photonics
Background:
- Developing stable, wideband, and tunable lasers is crucial for advanced optical communication systems.
- Bidirectional access networks require efficient data transmission and wavelength selection capabilities.
- Existing laser technologies may face limitations in terms of tunability, stability, and integration for bidirectional applications.
Purpose of the Study:
- To propose and demonstrate a novel tunable directly modulated fiber ring laser (TDMFRL).
- To enable bidirectional data transmission in wavelength division multiplexing (WDM) access networks.
- To integrate the TDMFRL as both a data generator and a wavelength-selecting light source.
Main Methods:
- Utilizing a reflective semiconductor optical amplifier (RSOA) within the fiber ring.
- Incorporating an optical tunable filter (OTF) for wavelength selection and tuning.
- Experimentally demonstrating bidirectional transmission using the TDMFRL and a Fabry-Pérot laser diode (FP-LD) at the subscriber site.
Main Results:
- Achieved stable, wideband, and tunable laser operation.
- Successfully demonstrated bidirectional data transmission at 1.25-Gb/s direct modulation.
- Verified the TDMFRL's capability to serve as a wavelength-selecting injection light source for the FP-LD.
- Confirmed good performance over a 25-km single-mode fiber (SMF) link.
Conclusions:
- The proposed TDMFRL offers a stable, wideband, and tunable solution for bidirectional optical access networks.
- The integrated functionality of the TDMFRL simplifies network architecture and enhances performance.
- This technology shows significant potential for future WDM-based access network deployments.