It is now almost twenty-five years since the first Erbium-Doped Fiber Amplifier (EDFA) was
demonstrated. Currently, the EDFA is one of the most important elements widely used in …

Ultra-short wavelength operation of a thulium fibre laser is investigated. Through use of core
pumping and high feedback efficiency wavelength selection, a continuously-tunable fibre …

Linearly-polarized (LP) fiber lasers, which could find wide potential applications such as
coherent detection, coherent/spectral beam combining, nonlinear frequency conversion …

In this paper, high-speed surface-illuminated Ge-on-Si pin photodiodes with improved
efficiency are demonstrated. With photon-trapping microhole features, the external quantum …

Bi-and Er-codoped germanosilicate optical fibers have been fabricated and studied as a
potential gain medium for fiber-based devices operating in the near infrared region. A …

We investigate the operation of holmium-doped fibre amplifiers (HDFAs) in the 2.1 µm
spectral region. For the first time we demonstrate a diode-pumped HDFA. This amplifier …

This work deals with research and optimization of the optical Ge–Si glass composition
doped with Er 3+, Yb 3+ ions and bismuth optically active centers (BACs), which are …

We report a low noise, broadband, ultrafast Thulium/Holmium co-doped all-fiber chirped
pulse amplifier, seeded by an Erbium-fiber system spectrally broadened via coherent …

We present the development of a pair of silica-based thulium-doped fiber amplifiers working
together in a broad spectral range from 1.65 µm to 2.02 µm. For the one optimized for shorter …

A multi-wavelength pumped thulium doped fiber amplifier is investigated to extend the
spectral gain coverage of the amplifier in the 1.7-1.9 μm wavelength range. Through the use …