Bi-doped Fiber Research Articles

Optical amplification in 1430-1495 nm range and laser action in Bi-doped fibers

An emission band with a maximum at 1430 nm and a FWHM of 100 nm was observed in a Bi-doped fiber under core-pumping in the 1340- 1370 nm wavelength range. Net gain in 1430-1490 nm and laser action in 1443-1459 nm wavelength range in the Bi-doped aluminosilicate fiber have been demonstrated for the first time to our knowledge.

Bi-doped fiber lasers and amplifiers for a spectral region of 1300–1470 nm

Bismuth-doped fiber lasers operating in the range 1300-1470 nm have been demonstrated for the first time, to our knowledge. It has been shown that Bi-doped alumina-free phosphogermanosilicate fibers reveal optical gain in a wavelength range of 1240-1485 nm with pumping at 1205, 1230, or 808 nm.

Tunable modelocked bismuth-doped soliton fibre laser

A modelocked bismuth-doped soliton fibre laser is reported. A stable passively modelocked operation in an anomalous dispersion regime is achieved using a dilute nitride (GaInNAs)-based semiconductor saturable absorber mirror and a transmission grating pair for dispersion compensation. The laser generated 0.9 ps soliton pulses with a repetition rate of 7.5 MHz and wavelength tunable from 1153–1170 nm. These are the shortest pulses obtained so far from Bi-doped fibre lasers.

High-power cw bismuth-fiber lasers

Continuous-wave lasing of Bi-doped fiber lasers in a wavelength range of 1150-1215 nm with a power of up to 15 W has been obtained for the first time. The unsaturable optical losses in Bi-doped fibers have been revealed and their influence on the Bi-laser operation is investigated. Frequency doubling of the Bi-fiber laser radiation is demonstrated that can be used as a yellow light source (wavelength of 580 nm).

Mode-locked Bi-doped fiber laser

Mode locking is obtained for what we believe to be the first time in a Bi-doped fiber laser. Stable 50 ps laser pulses with a pulse repetition rate of 13 MHz are generated at a wavelength of 1161.6 nm with a 2 mW average power.

Yb-Bi pulsed fiber lasers

A new type of pulsed fiber laser is suggested and developed - Yb-Bi lasers. In such lasers the Yb fiber laser is Q-switched by use of a saturable absorber, a Bi-doped fiber placed in its own resonator, and pulsed lasing is obtained in both fiber lasers. Continous-wave diode-clad pumping of the Yb-Bi lasers at a 975 nm wavelength with power up to 16.5 W results in pulsed laser action in a spectral diapason of 1050-1200 nm with a maximum pulse energy of up to 100 microJ, an average power up to 7.5 W, and a repetition rate up to 100 kHz.