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Proceedings Paper

Analysis of multiwavelength erbium-doped fiber ring source
Author(s): Andrzej Dobrogowski; Jan Lamperski; Piotr Stepczak
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Paper Abstract

In the presented work, we report the original numerical results of the properties of ring optical frequency comb generators employing the acousto optic frequency shifter (AOFS) and the single stable master laser (ML). A key element of the examined source is the AOFS controlled by the RF generator which determines frequency comb interval and stability. In each loop round-trip, AOFS splits the optical beam into two, where the deflected beam is frequency shifted. The multiple divisions, spectrum shifting and optical beam amplification in the ring configuration result in generating of an optical frequency comb. Performed numerical simulations allow spectral analysis of the generated optical frequency comb. We tested configurations with single and two cascaded AOFS operating at 1.5625 GHz. Calculations were carried out for a variety of input laser powers and different quantity of optical output frequencies whose number was controlled by an optical feedback filter bandwidth. It was shown that for different configurations and component parameters it was possible to obtain 20 - 30 uniform peaks with the amplitude difference of less than 0.5 dBm and OCNR in the range of 35-45 dB. We demonstrated that the main problem of the simultaneous multiwavelength fiber ring laser operation can be overcome by using a non resonant ring configuration with a quasi steady state operation. This method ensures generating of an optical comb with stable carrier frequency spacing. It allows diminishing the interchannel spacing and building up an ultra dense wavelength division multiplexing system.

Paper Details

Date Published: 24 September 2005
PDF: 7 pages
Proc. SPIE 5952, Optical Fibers: Applications, 59521Q (24 September 2005); doi: 10.1117/12.623231
Show Author Affiliations
Andrzej Dobrogowski, Poznan Univ. of Technology (Poland)
Jan Lamperski, Poznan Univ. of Technology (Poland)
Piotr Stepczak, Poznan Univ. of Technology (Poland)


Published in SPIE Proceedings Vol. 5952:
Optical Fibers: Applications
Leszek R. Jaroszewicz; Brian Culshaw; Anna Grazia Mignani, Editor(s)

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