CW-Pumped Evanescent Amplification at 1.55 μm Wavelength Using Highly Er{sup}(3+)-Doped Glass over Side-Polished Fiber

摘要

A diode-pumped relative gain of 2 dB at 1.55 μm wavelength based on evanescent excitation using a highly Er{sup}(3+)-doped laser glass over side-polished fiber was demonstrated for the first time. The pump efficiency can be highly improved with a blazed grating to achieve ultra-low-noise fiber amplifiers and upconversion fiber lasers.