研究目的
Investigating the generation of modulated laser outputs operating in the O-band region using a multi-walled carbon nanotube based saturable absorber in a praseodymium-doped fluoride fiber laser.
研究成果
A tunable and optically modulated PDFF laser operating in the O-band region has been demonstrated. The laser uses an MWCNT SA to generate a modulated output while the TBPF is incorporated into the cavity to tune the output wavelength. The laser is capable of generating modulated outputs at a central wavelength of 1300 nm above a threshold pump power of 511 mW. The output is stable, with peak power fluctuations of less than ～4 dB.
研究不足
The pulse energy is relatively low as compared to reported works using the same SA. The output power and pulse energy can be improved by further optimizing the laser cavity’s coupling ratio and cavity length.
1：Experimental Design and Method Selection:
The laser uses an MWCNT SA to generate a modulated output while the TBPF is incorporated into the cavity to tune the output wavelength. The laser cavity uses a
2：7 m PDFF as a gain medium. Sample Selection and Data Sources:
A praseodymium-doped fluoride fiber is used as the gain medium.
3：List of Experimental Equipment and Materials:
The setup includes a 1020 nm laser diode, a 1020/1310 nm wavelength division multiplexer, an optical isolator, a tunable bandpass filter, and a 95:5 optical coupler.
4：Experimental Procedures and Operational Workflow:
The PDFF is pumped by a 1020 nm laser diode through the 1020 nm port of a WDM. The amplified output from the PDFF is transmitted through an optical isolator and guided into the SA which modulates the signal.
5：Data Analysis Methods:
The performance of the PDFF laser is investigated using an optical spectrum analyzer, an oscilloscope, and a radio-frequency spectrum analyzer.
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