[IEEE 2008 Conference on Optical Fiber Communication - OFC 2008 Collocated National Fiber Optic Engineers - San Diego, CA, USA (2008.2.24-2008.2.28)] OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference - Broadband Wavelength-Tunable Harmonically Mode-Locked Fiber Ring Laser Using a Bismuth-Oxide-Based Erbium-Doped Fiber and a Bismuth-Oxide-Based Highly Nonlinear Fiber