Journal article
Quantum limited noise figure operation of high gain erbium doped fiber amplifiers
Performance improvements obtained by using an isolator as an amplified-spontaneous-emission-suppressing component within erbium-doped fibers are evaluated. Simultaneous high-gain and near-quantum-limited noise figures can be obtained by such a scheme. The noise figure improves for input signal powers below -5 dBm, and an improvement of 2.0 dB with a simultaneous gain increase of 4.1 dB is measured relative to a gain-optimized fiber.
The optimum isolator location is evaluated for different pump and signal wavelengths in both an Al/Er-doped and a Ge/Er-doped fiber, for pump and signal power variations and different pump configurations. In all cases the optimum isolator position lies within 10-37% of the total fiber length for small signal operation
| Language: | English |
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| Publisher: | IEEE |
| Year: | 1993 |
| Pages: | 1344-1352 |
| ISSN: | 15582213 and 07338724 |
| Types: | Journal article |
| DOI: | 10.1109/50.254094 |
| ORCIDs: | Rottwitt, Karsten |
4.1 dB Al/sub 2/O/sub 3/-SiO/sub 2/:Er Doped fiber amplifiers EDFA Er-doped fibre amplifiers Erbium Erbium-doped fiber amplifier Filters Gain measurement GeO/sub 2/-SiO/sub 2/:Er Isolators Noise figure Noise measurement Spontaneous emission Wavelength measurement amplified-spontaneous-emission-suppressing component erbium fibre lasers gain-optimized fiber high gain erbium doped fiber amplifiers input signal powers near-quantum-limited noise figures noise optical communication equipment optical isolators optical pumping optimisation optimum isolator location pump configurations pump power pump wavelengths signal power variations signal wavelengths simultaneous gain increase small signal operation superradiance total fiber length
