1.3/1.4 μm dual-wave band dissipative soliton resonance in a passively mode-locked Bi-doped phosphosilicate fiber laser

We report the 1.3/1.4 mu m dual-wave band dissipative soliton resonance (DSR) in a passively mode-locked bismuth-doped phosphosilicate fiber (Bi-PSF) laser. The low-water-peak Bi-PSF with two bismuth active centers associated with silicon and phosphorus supports the O+E-band gain. Using a 1239 nm home-made Raman fiber laser as pump source and non-linear amplifying loop mirror for initiating mode-locking, stable DSR operation at 1343 and 1406 nm is achieved with the spectral bandwidth of 12 and 16 nm. The pulse duration with the pump power increases from 62 to 270 ps with a repetition frequency of 4.069 MHz. The average power is 11.05 mW corresponding to the maximum energy of 2.7 nJ. This is, to the best of our knowledge, the first demonstration of a mode-locked fiber laser in the similar to 1.38 mu m water absorption band and the O+E dual-wave band operation for applications in all-spectral-band communications, bio-medical imaging, and terahertz difference frequency generation. (c) 2023 Optica Publishing Group

Automated summary

In this study, we demonstrate a dissipative soliton resonance (DSR) in a bismuth-doped phosphosilicate fiber (Bi-PSF) laser operating at dual-wave bands of 1.3/1.4 μm. By utilizing a homemade Raman fiber laser at 1239 nm as the pump source and a non-linear amplifying loop mirror for initiating mode-locking, stable DSR operation is achieved at the wavelengths of 1343 nm and 1406 nm with large spectral bandwidths. This work opens up opportunities for various applications, including all-spectral-band communications, bio-medical imaging, and terahertz difference frequency generation.