研究目的
Investigating the output performance of an incoherently pumped random fiber laser (RFL) dependence on the pump bandwidth.
研究成果
The pump bandwidth could influence the gain characteristics and nonlinear effects, eventually affecting the output performance such as power scaling process, achievable maximum OSNR and even the spectral broadening. High OSNR RFL can be achieved with broadband ASE pumping, and a relatively broad pump bandwidth can help suppress the spectral broadening.
研究不足
The spectral power density has declined significantly with tuning the bandwidth from 0.6 to 40 nm.
1：Experimental Design and Method Selection:
Utilized a bandwidth-adjustable ASE source as the pump to investigate the spectral and power characteristics of a RFL as functions of the pump bandwidth.
2：Sample Selection and Data Sources:
A homemade high-power ASE source with linewidth tunability is utilized as the pump source.
3：List of Experimental Equipment and Materials:
Master oscillator power amplifier configuration, broadband ASE seed, bandwidth-adjustable optical filter, three stages of amplifiers, wavelength division multiplexer (WDM), spool of 375-m-long passive fiber, fiber Bragg grating (FBG).
4：Experimental Procedures and Operational Workflow:
The pump wave is injected through the 1070 nm port of a WDM, the common port of the WDM is spliced with a spool of 375-m-long passive fiber to provide the RDFB, and the 1120 nm port of the WDM is connected with a 1120 nm FBG thus constructing a half-opened cavity.
5：Data Analysis Methods:
Analyzed the spectral and power performance of the RFL by adjusting the passband of the filter inside the pump source.
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