研究目的
To demonstrate a tunable mid-infrared fiber gas Raman laser in methane-filled anti-resonant HCFs pumped by a modulated and amplified tunable diode laser.
研究成果
The work demonstrates a tunable mid-infrared fiber gas Raman laser in methane-filled anti-resonant HCFs pumped by a diode laser, achieving a highest average output power of ~34 mW at 2829 nm. This method offers new opportunities for compact tunable mid-infrared fiber lasers.
研究不足
The efficiency is lower than previous results, partly due to the multimode and non-linear polarization characteristics of the pump source and the longer HCF length leading to more fiber loss.
1：Experimental Design and Method Selection:
The experiment involves using a homemade tunable high peak-power amplified diode laser to pump methane-filled hollow-core fibers for generating mid-infrared laser emission via stimulated Raman scattering.
2：Sample Selection and Data Sources:
Methane gas is used as the gain medium within hollow-core fibers.
3：List of Experimental Equipment and Materials:
The setup includes a tunable DFB laser, an electro-optic modulator system, erbium-doped fiber amplifiers, hollow-core fibers, and various optical components like mirrors and lenses.
4：Experimental Procedures and Operational Workflow:
The pump light is collimated and coupled into the HCF, with the output measured after passing through a filter to remove pump light.
5：Data Analysis Methods:
Output characteristics are investigated with different pump wavelengths and repetition rates, with spectra and power measured using optical spectrum analyzers and power meters.
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