I. Yamashita et al., ER3-MU-M AND 1.55-MU-M( DOPED FIBER PREAMPLIFIER WITH SUBSIDIARY EDF FOR APPLICATION IN WDM SYSTEMS USING 2 SEPARATE WAVELENGTH BANDS OF 1.53), Electronics Letters, 32(18), 1996, pp. 1690-1691
An economical optical amplifier circuit for a pre-amplifier of multi-c
hannel WDM systems, using two separate wavelength bands of 1.53 and 1.
55 mu m, is proposed. The optical sensitivity of the receiver between
the two bands is balanced by installing a subsidiary Er3+ doped fibre
(EDF) in the 1.55 mu m path. Curves of bit error rates at 10 Gbit/s fo
r a six-channel receiver, two channels in the 1.53 mu m band and four
channels in the 1.55 mu m band, form a bunch of similar lines without
any error floor.