Abstract
In this paper, we present experimentally an erbium-doped fiber (EDF) laser system to accomplish the single-longitudinal-mode (SLM) and wavelength-upconverted output by using nonlinear effect. To accomplish the SLM output, a short length of unpumped EDF saturable absorber (SA) is applied inside the EDF laser cavity for filtering densely multi-mode noise. In accordance with the designed EDF laser system, the lasing wavelength can be upconverted to a longer wavelength position. In addition, the output characteristics of output power, optical signal to noise ratio (OSNR), tunability, stability and linewidth in the EDF laser are also discussed.
Highlights
In recent times, erbium-doped finer (EDF) based gain medium in the fiber laser systems have attracted more interests due to their valuable applications in the optical communication, wavelengthdivision-multiplexing (WDM) traffic, micro-wave photonic, fiber sensing, high resolution spectroscopy and instrument testing [1]–[5]
In this paper, we present experimentally an erbium-doped fiber (EDF) laser system to accomplish the single-longitudinal-mode (SLM) and wavelength-upconverted output by using nonlinear effect
The demonstrated EDF ring laser is constructed by a fiber Bragg grating (FBG), two optical circulators (OCs), a polarization controller (PC), a fiber-type polarizer (POL), an erbiumdoped fiber amplifier (EDFA), a length of 5.5 m unpumped EDF and a 1×2 and 10:90 optical coupler (OCP)
Summary
Erbium-doped finer (EDF) based gain medium in the fiber laser systems have attracted more interests due to their valuable applications in the optical communication, wavelengthdivision-multiplexing (WDM) traffic, micro-wave photonic, fiber sensing, high resolution spectroscopy and instrument testing [1]–[5]. Based on the designed EDF laser scheme, the lasing wavelength can be upconverted to 1554.30, 1558.37 and 1562.83 nm owing to the nonlinear effect, while the original Bragg wavelength of FBG is selected at 1544.04, 1535.98 and 1531.79 nm, respectively.
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