Abstract
Comprehensive Investigation on the Role of Temporal Property of Pump Laser in a Single-Frequency Raman Fiber Amplifier
Highlights
Raman fiber lasers (RFLs) have been developed rapidly in the past decades benefited from their power scalability and wavelength agility compared with rare-earth-doped fiber lasers [1]
The experimental results show that a copumped single-frequency Raman fiber amplifier (RFA) could provide a well platform to reflect the intensity stability of the pump laser, and the optical-to-optical conversion efficiency of the RFA varies with the intensity stability of the pump laser
The irregular spectral shapes are mainly induced by the mismatch between the central wavelength of the high reflectivity (HR) and output coupling (OC) fiber Bragg gratings (FBGs) and the irregular reflective spectra of FBGs
Summary
Raman fiber lasers (RFLs) have been developed rapidly in the past decades benefited from their power scalability and wavelength agility compared with rare-earth-doped fiber lasers [1]. The output power of Raman fiber amplifiers (RFAs) has reached kilowatt level [2]–[4], and most of the high power RFAs have broadband linewidth. In application fields such as nonlinear frequency conversion, single-frequency or narrow linewidth are strongly required [5]–[8]. RFAs operating at 1.12 μm–1.18 μm could be transferred to yellow light through second-harmonic generation, which have many applications in medicine and astronomy [5], [6]. The lasers operating at 1178 nm could be transferred to 589 nm, which are widely used in sodium laser guide star adaptive optics [7], [8].
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