In-line gain control of the Erbium doped fiber amplifier using samarium doped inner-cladding in the 1.5μm region

摘要

A new type of erbium doped fiber is fabricated to generically control the gain of optical amplifier by introducing samarium doped inner-cladding. In the wavelength range of 1530 to 1560 nm, less than 2 dB variation for average 12 dB gain was achieved without using external filters. In the wavelength range of 1560 to 1620 nm, the samarium doped ring caused decrease in amplified spontaneous emission power around 1580 nm.