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A novel polarization-independent flat-top comb filter using variable ratio coupler (VRC)-based Mach-Zehnder interferometer is demonstrated. By adjusting the coupling ratios, the multiwavelength switchable flat-top operation is obtained. Theoretical prediction is verified by the experimental results.
A tunable and switchable multiwavelength passively mode-locked fiber laser by using a semiconductor saturable absorber mirror (SESAM) and an inline birefringence fiber filter is proposed and demonstrated. By properly rotating the polarization controllers (PCs), up to 7-wavelength mode-locked pulses in 3-dB bandwidth with 3.65-nm channel spacing are obtained. The wavelength switchable operation is...
We propose and demonstrate a multiwavelength switchable fiber ring laser by employing a simple but novel polarization beam splitter (PBS)-based Mach-Zehnder (M-Z) comb filter. The proposed comb filter consists of a rotatable polarizer, a PBS, and a 3-dB fiber coupler. By adjusting the polarization state of the lasing light launched into the PBS, the multiwavelength switchable operation can be easily...
We propose and demonstrate an efficiently switchable dual-wavelength passively mode-locked fiber laser incorporating a semiconductor saturable absorber mirror (SESAM) and a comb filter. The onset of passive mode-locking is assisted with the SESAM. By properly rotating the polarization controllers (PCs), the switchable dual-wavelength mode-locked operation are efficiently obtained.
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