Abstract
A multiwavelength fiber laser based on erbium-doped twin-core fiber (ED-TCF) and nonlinear optical loop mirror (NOLM) is proposed and demonstrated in this paper. The ED-TCF is employed as comb filter and gain medium simultaneously. The NOLM serves as an intensity equalizer. A fiber laser with 8 wavelength outputs is achieved at room temperature. The optical signal to noise ratio (OSNR) is larger than 40 dB. The fluctuation of peak power and wavelength is less than 1 dB and within 0.015 nm, respectively. This fiber laser has the advantages of simple structure and stable operation.
Highlights
Multiwavelength erbium-doped fiber lasers (MEDFLs) are of great interests for many applications, such as optical sensing [1], wavelength division multiplexing (WDM) communication systems [2] and optical instrument testing [3], [4]
EXPERIMENTAL RESULTS AND DISCUSSION We first demonstrate the performance of erbium-doped twin-core fiber (ED-twin-core fibers (TCFs))
Due to the high erbium-doped ratio of the core of homemade ED-TCF, the light around 1530 nm is highly absorbed and the loss is larger than 35 dB which in turn manifest that the ED-TCF has a good absorption property
Summary
Multiwavelength erbium-doped fiber lasers (MEDFLs) are of great interests for many applications, such as optical sensing [1], wavelength division multiplexing (WDM) communication systems [2] and optical instrument testing [3], [4]. It is difficult to simultaneously achieve multiwavelength oscillation in MEDFLs at room temperature due to the predominately homogeneous gain broadening of the EDF, which leads to the strong mode competition and unstable operation [5]. A new configuration which uses several meters of erbium-doped twin-core fiber (ED-TCF) and a NOLM is presented.
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