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Er-doped fibre laser mode-locked by mechanically exfoliated graphene saturable absorber

Sotor J., Sobon G., Abramski K. M.

Opto-Electronics Review

2012

Vol. 20, No. 4

362-366

Erbium-doped fibre laser mode-locked by a graphene saturable absorber is presented. Pulses with 630-fs duration and 41.9-MHz repetition frequency were achieved at the centre wavelength of 1562 nm and 9-nm FWHM bandwidth. Multilayer graphene was obtained by mechanical exfoliation from a pure graphite block by using the scotch-tape method and deposited on a fibre ferrule to form a saturable absorber. The laser operated in a mode-locked regime with 37-mW pumping and 4-mW output power.

Fiber-MOPA sources of coherent radiation

Kaczamarek P., Sobon G., Sotor J., Antonczak A., Abramski K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2010

Vol. 58, nr 4

485-489

This paper presents the concept and design of medium to high power fiber radiation sources in MOPA (Master Oscillator Power Amplifier) configuration. Research results are presented on a two-stage power amplifier for MOPA applications for the third telecommunications window at 1550 nm based on active erbium-doped and erbium/ytterbium-doped fibers. The amplifier is fabricated entirely in fiber technology and delivers several watts of output power.