Related Experiment Video
Updated: May 22, 2026
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
Upstream capacity upgrade in TDM-PON using RSOA based tunable fiber ring laser
Lilin Yi1, Zhengxuan Li, Yi Dong
1State Key Lab of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Department of Electronic Engineering, Shanghai 200240, China. lilinyi@sjtu.edu.cn
Optics Express
|April 27, 2012
Summary
This study introduces an upstream multi-wavelength shared time division multiplexing passive optical network (TDM-PON) using a novel laser source. It dynamically upgrades upstream capacity by assigning dedicated wavelengths to users with high bandwidth demands.
Area of Science:
- Optical Networking
- Telecommunications Engineering
Background:
- Passive Optical Networks (PONs) are crucial for broadband access.
- Existing TDM-PON systems face limitations in upstream capacity scaling.
Purpose of the Study:
- To present a novel upstream multi-wavelength shared (UMWS) TDM-PON architecture.
- To enhance upstream capacity dynamically for users with high bandwidth demands.
Main Methods:
- Utilized a reflective semiconductor amplifier (RSOA) and tunable optical filter (TOF) for a directly modulated fiber ring laser upstream source.
- Implemented an upgraded optical network unit (ONU) with a tunable TOF to assign individual wavelengths.
- Demonstrated bidirectional transmission over 25-km single mode fiber (SMF).
Main Results:
- Achieved stable laser operation and direct modulation in the RSOA saturation region.
- Successfully transmitted 10-Gb/s downstream and 1.25-Gb/s upstream per wavelength with minimal power penalty.
- Demonstrated stable upstream wavelength tuning from 1530 nm to 1595 nm.
- Presented successful burst-mode transmission due to high extinction ratio (ER) and improved TDM performance.
Conclusions:
- The proposed UMWS TDM-PON effectively upgrades upstream capacity dynamically.
- The novel laser source enables stable operation and efficient wavelength assignment.
- The system shows promise for future high-bandwidth optical access networks.