Abstract
Multiwavelength half-linear cavity Brillouin erbium fiber laser (BEFL) has been demonstrated. The half-linear cavity BEFL is formed by utilizing only two circulators: one circulator acts as input and output ports and the other circulator is used to form a physical mirror. This design exhibits low peak power difference between the adjacent channels, which is about 0.8 dB. At Brillouin pump (BP) power of 5 dBm and erbium doped fiber (EDF) pump power of 90 mW, up to 19 channels over a wide range of 40 nm (1529 nm to 1569 nm) have been obtained. These channels are free from self lasing cavity modes and for the first twelve Stokes lines, the optical signal to noise ratio (OSNR) is approximately higher than 20 dB.
Highlights
Multiwavelength fiber lasers have simple configuration and wide applications that include fiber sensor, optical communications system, optical component testing, microwave photonics, and others
The Brillouin pump (BP) wavelength was inserted into the laser cavity through port 1 of C1 while the Brillouin erbium fiber laser (BEFL) output spectrum was monitored at port 3
The double pass amplification box consists of a 10-m long erbium doped fiber (EDF) with an absorption coefficient of 5.6 dB/m at 1531 nm and pumped by 1480 nm laser diode through a 1480/1550 nm wavelength selective coupler (WSC)
Summary
Multiwavelength fiber lasers have simple configuration and wide applications that include fiber sensor, optical communications system, optical component testing, microwave photonics, and others. The tuning range of the BEFL can be defined as the range of BP wavelength which produces the Brillouin Stokes lines in the absence of self lasing cavity modes.
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