1. College of Engineering Swansea University Swansea Wales UK
2. In memory of Professor Michel E. Marhic, a pioneer in the research of fiber optical parametric amplifiers, who passed away unexpectedly during the preparation of this paper
3. Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden
4. Optoelectronics Research Centre, University of Southampton Southampton SO17 1BJ UK
5. Department of Electrical and Computer Engineering Jacobs School of Engineering, University of California San Diego 9500 Gilman Dr La Jolla CA 92093‐0407 USA
6. FOTON Laboratory, CNRS UMR 6082, ENSSAT University of Rennes 1 Lannion France
7. Department of Photonics Engineering Technical University of Denmark, Kgs Lyngby Denmark
8. Technische Universität Berlin Fachgebiet Hochfrequenztechnik‐Photonics 10587 Berlin Germany