研究目的
Demonstrating a dual-wavelength laser with emission in the 2 μm wavelength region using a thulium/holmium co-doped fiber and a non-adiabatic tapered fiber as a comb filter.
研究成果
The proposed stable configuration with high SMSR is sufficiently practical for typical dual-wavelength applications while offering a safer environment to users. The operation of the proposed dual laser in the 2 μm region could potentially grant more effective and open up new possibilities for dual-wavelength applications.
研究不足
The inhomogeneous surface of the tapered fiber may induce some 'hot spots' in high power operation, leading to unstable lasing oscillation. High intensities of light may induce self-phase modulation, causing spectral broadening.
1：Experimental Design and Method Selection:
The configuration employed a backward pumping scheme with a thulium/holmium co-doped fiber and a non-adiabatic tapered fiber as a comb filter.
2：Sample Selection and Data Sources:
A 15 m thulium/holmium co-doped fiber was used, with absorption of approximately 17 dB m?1 at 1550 nm.
3：List of Experimental Equipment and Materials:
A 1550 nm laser source amplified with erbium-doped fiber amplifier, non-adiabatic tapered fiber, polarization independent isolator, optical coupler, and Yokogawa AQ6375B Optical Spectrum Analyzer.
4：Experimental Procedures and Operational Workflow:
The laser was pumped with a 1550 nm laser source, and the output was measured using an optical spectrum analyzer.
5：Data Analysis Methods:
The optical spectrum was numerically integrated to determine the power of the laser lines individually.
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