An efficient and compact double-pass optical fiber amplifier is demonstrated using a newly developed hafnia bismuth erbium co-doped fiber(HBEDF) as a gain medium. The HBEDF is fabricated using a modified chemical va...
We experimentally demonstrate an S-band double-pass (DP) discrete fibre Raman amplifier (FRA) gain-flattened by using a mechanically induced long-period fibre grating (LPFG). Due to a photo-elastic effect in the...
An efficient and low noise short wavelength band erbium-doped fibre amplifier (S-band EDFA) is proposed and demonstrated using double-pass configuration. This amplifier provides a gain of 1500 nm signal as high as 2...
A waveguide amplifier is fabricated by Ag^+-Na^+ two-step ion exchange on Er/Yb-doped phosphate glass. The spectroscopic performance of glass and the properties of channel waveguide are characterized. A double-pass ...