Twenty two flattened channels L band multi-wavelength erbium doped fiber laser with composite ring cavity

Abstract

We demonstrated the generation of a multiwavelength laser comb through two different ring cavity designs. The first design, a ring laser with Sagnac filter is being modified to produce a second design known as composite ring cavity. The ASE spectrum obtained from the composite ring cavity is sliced into more than 30 laser lines. From this comb, 22 laser lines are flattened under the 3 dB peak power fluctuation and 25 lines are flattened under the 10 dB peak power fluctuation. The 24 laser lines have a bandwidth value of 10.48 nm and for each of them, the average OSNR value is found to be at 24 dB. The OSNR value distribution among the laser lines is nearly uniform. However, the fineness obtained in this scheme is very low as 2.8.

Large dynamic range operation of ultra-higher number MWFLs affected by MZI-SI

“…There is less than 10 nm span range for 10 dB peak power fluctuation with without the MZI part. This result was reported in our previous publication [22]. Figure 3(a) shows that the best performance of the ultra-broadband lasing spectrum has been obtained with the center wavelength of 1570 nm when the MZI part was inserted as shown in figure 1.…”

“…Thus, this large contribution enables the realization of at least a 70 nm span range multiwavelength laser spectrum. This configuration is an enhancement of our previous fiber laser system [22].…”

“…In the latest report, Yu Huang used the NPR technique and mentioned over 75 filter lines within a 60 nm span with channel spacing of 0.8 nm [13]. From our previously reported manuscript, we successfully generated at least 22 flattened transmission filter lines through a composite ring cavity [22].…”

Enhanced multiwavelength generation in Brillouin fiber laser with pump noise suppression technique

“…Various techniques have been proposed to construct multiwavelength fiber lasers. The integration of rare-earth gain medium in the cavity is one of preferred choices through various reports such as erbium-doped fiber [1][2][3][4], ytterbiumdoped fiber [5] and thulium doped fiber [6,7]. On the other hand, multiwavelength fiber lasers can also be constructed utilizing fiber nonlinearity phenomena such as stimulated Brillouin scattering (SBS) [8], stimulated Raman scattering [9,10], four-wave mixing (FWM) [6], and Rayleigh scattering [11].…”