A cost-effective 25-Gb/s EML TOSA using all-in-one FPCB wiring and metal optical bench.
We present a cost-effective 25-Gb/s electro-absorption modulator integrated laser (EML) transmitter optical sub-assembly (TOSA) using all-in-one flexible printed circuit board (FPCB) wiring and a metal optical bench (MOB). For a low cost and high bandwidth TOSA, internal and external wirings and feed-through of the TOSA to transmit radio-frequency (RF) signal are configured all-in-one using the FPCB. The FPCB is extended from an exterior of the TOSA package up to an EML chip inside the package through the slit formed on a rear sidewall of the package and die-bonded on the MOB. The EML TOSA shows a modulated output power of more than 3.5 dBm and a clear eye pattern with a dynamic extinction ratio of ~8.4 dB at a data rate of 25.78 Gb/s.
Young-Tak
YT
Han
Oh-Kee
OK
Kwon
Dong-Hun
DH
Lee
Chul-Wook
CW
Lee
Young-Ahn
YA
Leem
Jang-Uk
JU
Shin
Sang-Ho
SH
Park
Yongsoon
Y
Baek