10-GHz Optical Comb in L-Band Region With Brillouin/Erbium-Doped Fibre Laser (original) (raw)

Efficient multiwavelength generation of Brillouin/erbium fiber laser at 1600-nm region

Microwave and Optical Technology Letters, 2002

An efficient Brillouin/erbium fiber laser, which operates in the 1600-nm (L-band) region, is demonstrated for potential applications in future dense-wavelength division multiplexing communication systems. The laser configuration consists of an L-band EDFA (to enable L-band amplification) where two 3-dB couplers take a portion of the generated BEFL signal and re-inject it into the single-mode fiber in order to seed a cascaded BEFL line in the same direction as the first BEFL line. An efficient BEFL can be obtained by recycling backward a 1550-nm-band amplified spontaneous emission as a secondary pump source for the unpumped EDF in the L-band EDFA section. As a result, the lasing threshold is reduced and slope efficiency is improved. A stable and strong laser comb of up to five lines with 10-GHz spacing has been obtained with a Brillouin pump of 4.8 mW and a 980-nm pump of 92 mW. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 506–508, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10650

Low-threshold characteristics of a linear-cavity multiwavelength brillouin/erbium fiber laser

Microwave and Optical Technology Letters, 2004

A novel operation scheme of a multiwavelength Brillouin/Erbium fiber laser (BEFL) utilizing a linear cavity is presented. Twenty-two stable output laser lines with 10.88-GHz (0.088-nm) line spacing at 1558 nm were obtained from this architecture without the need of internal feedback. A low threshold of 4-mW pump power with 2.3-mW launched Brillouin pump at 1558 nm was obtained. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 114–117, 2004; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.20064

Wide bandwidth and flat multiwavelength Brillouin-erbium fiber laser

A wide bandwidth and flat multiwavelength Brillouin-erbium fiber laser is demonstrated experimentally. In the proposed laser setup, the combination of a Brillouin mirror with feedback and a ring cavity with four-wave mixing assistance is realized. The efficiency of Brillouin Stokes lines generation is enhanced by the feedback-based Brillouin mirror structure. The effect of four-wave mixing in highly nonlinear fiber increases the generation of Brillouin Stokes lines in a wider bandwidth. The laser lines over 16 nm bandwidth (i.e 200 channels) within 4.65 dB power difference are obtained. The generated laser lines span from 1534 to 1550 nm with wavelength spacing of 0.08 nm and optical signal-to-noise ratio of at least 15 dB. The laser can also be freely tuned over 32 nm and is stable with power fluctuations of 0.7 dB over 1 hour duration.