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Multiwavelength fiber ring laser based on a semiconductor and fiber gain medium
1Department of Physics, University of Connecticut, Storrs, CT 06269, USA. chen@phys.uconn.edu
Optics Express
|February 4, 2009
Summary
A new hybrid laser source using semiconductor and erbium-doped fiber amplifiers generates over 60 wavelengths with high signal-to-noise ratio (SNR). This tunable laser operates across a broad spectrum, offering potential for advanced optical applications.
Area of Science:
- Photonics and Laser Technology
- Optical Engineering
- Materials Science
Background:
- Multi-wavelength laser sources are crucial for various applications, including spectroscopy, telecommunications, and sensing.
- Existing laser technologies face limitations in terms of wavelength coverage, stability, and output power.
- Hybrid gain media offer a promising approach to overcome these limitations by combining the advantages of different amplifying materials.
Purpose of the Study:
- To develop and characterize a novel multi-wavelength laser source utilizing a hybrid gain medium.
- To investigate the performance of a laser system incorporating a semiconductor optical amplifier (SOA) and an erbium-doped fiber amplifier (EDFA).
- To demonstrate the tunability and spectral characteristics of the proposed laser system.
Main Methods:
- A hybrid gain medium combining a semiconductor optical amplifier (SOA) and an erbium-doped fiber amplifier (EDFA) was employed.
- A double-ring resonator cavity design was implemented to facilitate multi-wavelength oscillation.
- Optical spectrum analyzer and power meter were used to characterize the laser output, including wavelength number, signal-to-noise ratio (SNR), spectral width, and tuning range.
Main Results:
- The developed laser source successfully generated over 60 distinct lasing lines.
- A high signal-to-noise ratio (SNR) exceeding 50 dB was achieved for the generated lines.
- The wavelength interval between adjacent lines was approximately 0.32 nm, with a 3 dB spectral width of approximately 0.019 nm for each line.
- The laser demonstrated tunability from 1526 nm to 1562 nm by adjusting intra-cavity loss.
Conclusions:
- The novel hybrid gain medium laser source offers a high-performance solution for generating numerous stable, narrow-linewidth wavelengths.
- The demonstrated wide tuning range and high SNR make this laser system suitable for advanced optical sensing, spectroscopy, and telecommunication applications.
- The hybrid approach effectively leverages the strengths of both SOA and EDFA technologies for enhanced laser performance.
