Using tunable coherent reflectometry to optimize ER‐doped L‐band amplifiers

The use of tunable coherent reflectometry is an efficient technique to characterize doped‐fiber amplifiers. This technique is used to perform tests with EDF in the L band, thus permitting the determination of optimum length. The results confirm that some known structures increase the small‐signal gain by adding a seed signal in a single pump‐fiber amplifier. The analyzed fiber presented 23.5‐dB flat gain from 1570 to 1600 nm, which was obtained by introducing a flat ∼100% Bragg grating covering the C‐band before the Er‐doped fiber in a single pump/pass configuration. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 213–216, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11332

[1]  W. Margulis,et al.  Characterization of efficient dual-wavelength (1050 + 800 nm) pumping scheme for thulium-doped fiber amplifiers , 2003, IEEE Photonics Technology Letters.

[2]  Sang Bae Lee,et al.  Demonstration of highly efficient flat-gain L-band erbium-doped fiber amplifiers by incorporating a fiber Bragg grating , 2002 .

[3]  S. Csutak,et al.  High-speed interdigitated Ge PIN photodetectors , 2002, IEEE Photonics Technology Letters.

[4]  P. Poopalan,et al.  Gain clamping in L-band erbium-doped fiber amplifier using a fiber Bragg grating , 2002, IEEE Photonics Technology Letters.

[5]  Bengt Sahlgren,et al.  Fabrication of advanced fiber Bragg gratings by use of sequential writing with a continuous-wave ultraviolet laser source. , 2002, Applied optics.

[6]  Kyuman Cho,et al.  Broad-band erbium-doped fiber amplifier with double-pass configuration , 2001 .

[7]  J. Nilsson,et al.  Long-wavelength erbium-doped fiber amplifier gain enhanced by ASE end-reflectors , 1998, IEEE Photonics Technology Letters.

[8]  J. P. von der Weid,et al.  High-resolution distributed-gain measurements in erbium-doped fibers , 1998, IEEE Photonics Technology Letters.

[9]  Yasutake Ohishi,et al.  1.58 /spl mu/m band fluoride-based Er/sup 3+/-doped fibre amplifier for WDM transmission systems , 1997 .

[10]  N. Gisin,et al.  On the characterization of optical fiber network components with optical frequency domain reflectometry , 1997 .

[11]  J. Lit,et al.  Amplification enhancement of L-band erbium-doped fiber amplifiers by reflection scheme , 2002 .

[12]  R. J. Green,et al.  Performance analysis preclipping AM/QAM hybrid lightwave systems , 1997 .

[13]  E. Desurvire.  Erbium-doped fiber amplifiers , 1994 .