Dual-Wavelength Pumped Highly Birefringent Microstructured Silica Fiber for Widely Tunable Soliton Self-Frequency Shift

We report the design of a microstructured silica-based fiber for widely tunable soliton self-frequency shift, suitable pumping with two most common laser wavelengths: 1.04 {\mu}m and 1.55 {\mu}m. Depending on pump source, output spectrum can be continuously tuned up to 1.67 (pump at {\mu}m) or 1.95 in same 1.5 m-long sample, pump-to-soliton conversion efficiency higher than 20%. The is highly birefringent, which results an excellent polarization extinction ratio soliton, reaching 26 dB. shifted solitons have high degree coherence confirmed by pulse-to-pulse interference measurement. available tuning range covers wavelengths inaccessible lasers, e.g., 1.3 1.7 {\mu}m, important multi-photon microscopy imaging. Our work shows that it possible fabricate one universal optical supports shift when pumped different separated over 500 nm.