Title :
Amplified-spontaneous-emission pumped raman fiber laser
Author :
Levit, Boris ; Bekker, Alexander ; Smulakovsky, Vladimir ; Fischer, Baruch
Author_Institution :
Dept. of Electr. Eng., Technion - Israel Inst. of Technol., Haifa, Israel
Abstract :
We present an experimental study of a simple low-threshold Raman fiber laser, pumped by amplified spontaneous emission (ASE) of an erbium doped fiber amplifier. Such pumping for stimulated Raman scattering (SRS) and Raman laser, that is used to the best our best knowledge for the first time, suppresses stimulated Brillouin scattering and thus increases the pumping efficiency. The ASE pump had a central wavelength at 1550 nm and the outcome RFL oscillation wavelength was around 1670 nm, determined by the fiber Bragg gratings that formed the fiber resonator. We used various types of fibers, cavity lengths (2 - 25 km) and output grating reflectivities (4 - 97%). We obtained 34% overall laser to pump power efficiency and a pumping threshold power as low as ~160mW (as far as we know, the lowest ever achieved so far).
Keywords :
Bragg gratings; Raman lasers; erbium; laser beams; laser cavity resonators; optical fibre amplifiers; optical pumping; stimulated Raman scattering; superradiance; ASE pumped Raman fiber laser; JkJk:Er; SRS; amplified-spontaneous-emission; erbium doped fiber amplifier; fiber Bragg gratings; fiber resonator; grating reflectivity; low-threshold fiber laser; size 2 km to 25 km; stimulated Raman scattering; wavelength 1550 nm; Brillouin scattering; Doped fiber amplifiers; Erbium; Erbium-doped fiber lasers; Fiber lasers; Laser excitation; Pump lasers; Raman scattering; Spontaneous emission; Stimulated emission; Fiber lasers; Raman lasers;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 2008. IEEEI 2008. IEEE 25th Convention of
Conference_Location :
Eilat
Print_ISBN :
978-1-4244-2481-8
Electronic_ISBN :
978-1-4244-2482-5
DOI :
10.1109/EEEI.2008.4736593
