K. Yamashita et al., COMPACT-SAME-SIZE 52-MB S AND 156-MB/S SDH OPTICAL TRANSCEIVER MODULES/, Journal of lightwave technology, 12(9), 1994, pp. 1607-1615
Four types of compact SDH optical transceiver modules for intra- and i
nteroffice transmission systems operating at 51.84- and 155.52-Mb / s
have been incorporated with two types of packages which are the same s
ize for both bit rates. These modules contain both a transmitter and a
receiver with a clock recovery function integrated in a single packag
e. They were realized in the same size of L:50 mm X W:25 mm X H:8 mm (
volume:10 cm(3)) and L:81 mm X W:31 mm X H:8 mm (volume:20-cm(3)) for
intra- and interoffice system applications, respectively. The followin
g technologies were used in their development: 1) three kinds of custo
m IC's were implemented using a 2-mu m Si bipolar process, 2) surface-
mounted SAW filters with the same size for both bit rates, and 3) high
-density packaging technology to minimize receiver sensitivity degrada
tion due to crosstalk noises. As a result, high receiver sensitivity o
f -43.2 and -42.7 dBm was achieved for 51.84-/s and 155.52-Mb/s intero
ffice transceiver modules with a wide dynamic range of over 30 dB. Als
o, in transceiver modules for intraoffice system applications, a recei
ver sensitivity of -37.7 and -31.7 dBm were obtained for both bit rate
s.