11 September 2015 Design and experimental realization of a highly efficient superfluorescent fiber source with flat C-band spectrum
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Abstract
Design and experimental realization of C-band superfluorescent fiber sources using a well-designed high reflector/filter of fiber Bragg grating (FBG) in three configurations, namely double-pass forward (DPF), double-pass backward (DPB), and DPF+DPB, is realized. Using a numerical method, the optimum length and peak absorption coefficient of erbium-doped fiber as well as the optimum specifications of FBG, i.e., its 3-dB bandwidth and central wavelength, are calculated. Our numerical calculations illustrate that an appropriate design may result in a flattened amplified spontaneous emission (ASE) output spectrum with a 3-dB bandwidth of about 22 nm and a central wavelength of 1550 nm. Furthermore, the peak power of the flattened ASE spectrum is 16 dBm larger than the power at a wavelength of 1530 nm that is beneficial for increasing the 3-dB bandwidth. The experimental results show that using an optimum design, there are negligible differences between ASE output spectra acquired by different double-pass configurations. However, the DPB configuration has a higher efficiency as compared with other configurations and can provide a C-band superfluorescent fiber source with a simultaneously good spectral flatness, <0.73  dB, high output power of 12 dBm, and maximum 3-dB bandwidth of about 22 nm.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Atoosa Sadat Arabanian, Reza Massudi, "Design and experimental realization of a highly efficient superfluorescent fiber source with flat C-band spectrum," Optical Engineering 54(9), 096103 (11 September 2015). https://doi.org/10.1117/1.OE.54.9.096103 . Submission:
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