Aleksey N. Guryanov

Superfluorescent 1.44 μm bismuth-doped fiber source

The first bismuth-doped superfluorescent fiber source operating at 1.44-μm was developed. At pump power of 200 mW and pump wavelength of 1310 nm, its output signal reaches 57 mW with spectrum width of 25 nm.

All-solid photonic bandgap fiber with large mode area and high order modes suppression

We present all-solid bandgap fiber design with the small ratio of cladding elements diameter to pitch (0.24), with MFD of 36 m at 1 m wavelength and higher order mode suppression caused by the propagation loss difference.

Tm3+-doped CW fiber laser based on a highly GeO2-doped dispersion-shifted fiber

A novel all-fiber laser based on a highly GeO2-doped dispersion-shifted Tm-codoped fiber, pumped at 1.56 µm wavelength and lasing at 1.862 µm wavelength with a slope efficiency up to 37% was demonstrated. The single-mode Tm-doped fiber with the 55GeO2-45SiO2 core was fabricated for the first time by MCVD technique. The laser produces spectral side bands, resulting from the four-wave mixing owing to the shift of the zero-dispersion-wavelength of the fiber to the laser wavelength, thus, making it potentially particularly attractive for dispersion management and ultrashort pulse generation.

Bi-doped silica fibers - a new active medium for tunable fiber lasers and broadband fiber amplifiers

Spectroscopic study of MCVD Bi-doped silica-based optical fibers revealed a broadband long-lived luminescence with the maximum in 1050-1200 nm range that makes such fibers promising for fiber lasers and amplifiers for the second telecommunication window

Bi-doped silica fiber laser

A new type of fiber laser - Bi-doped silica fiber laser has been proposed and realized for the first time. The laser generation was observed in the spectral region of 1150-1300 nm. The fibers were fabricated by MCVD technique.

High-power double-clad Er-doped fiber laser

In this paper, we propose a novel all-fiber laser scheme with the output wavelength of 1565 nm based on a new Er-doped fiber design. A conventional commercially available pump source at 980nm (D=105μm, NA=0.2) is used for pumping. A high slope efficiency of 28% comparable with those in Er-Yb lasers was achieved owing to the utilization of the novel P2O5-Al2O3-SiO2 (PAS) glass as the host for Er3+ ions. A relatively low in-cavity fiber length (~14m) becomes possible owing to a small outer fiber diameter (80μm) and the use of a fiber taper (105μm to 80μm) for launching the pump.

Asymptotically Single-Mode Hybrid Fiber for Dispersion Management Near 1 μm

In this paper, we demonstrated the possibility of efficient dispersion management using a newly developed asymptotically single-mode hybrid fiber that has anomalous dispersion in the 1 μm spectral range. Of the few internal modes of the hybrid fiber, only one mode can propagate at a length longer than 6 m because of the modes differential optical absorption. This feature was achieved by inserting a highly absorbing ring layer at the position of the electric field minimum of the hybrid mode. About 10 m of an asymptotically single-mode hybrid fiber with an anomalous dispersion of ∼65 ps/(nm⋅km) at 1064 nm was used for the compression of 7 ps chirped pulses down to 440 fs duration. The use of the same hybrid fiber with a length of 6.5 m for intracavity dispersion management allowed us to demonstrate the stable operation of a ring soliton laser scheme based on a semiconductor satiable absorbing mirror. Pulses with duration of approximately 700 fs, a peak power of 850 W and energy as high as 0.55 nJ were extracted directly from the laser.

Superfluorescent 1.44-μm bismuth-doped fiber source

The first bismuth-doped superfluorescent fiber source operating at 1.44-μm was developed. At pump power of 200 mW and pump wavelength of 1310 nm, its output signal reaches 57 mW with spectrum width of 25 nm.