  We present the design and the test results of a quad-channel optical
transceiver module (QTRx) possibly for future particle physics experiments. The
transmitters of QTRx, each at 10 Gbps, are based on a Quad-channel VCSEL Diode
array Driver (QLDD) and 1 x 4 VCSEL array. The receivers of QTRx, with data
rates of 2.56 Gbps or 10 Gbps per channel, are based on a Quad-channel
Trans-Impedance and limiting Amplifier (QTIA) and 1 x 4 photodiode array of
GaAs or InGaAs. QTRx is 20 mm x 10 mm x 5 mm and couples to an MT fiber
connector. Test results indicate that QTRx achieves the design goals with a
power consumption of 124 mW per transmitter channel at 10 Gbps and 120 mW at
2.56 Gbps for the receiver channel with an on-chip charge pump. The
sensitivities of QTIA are -17 dBm at 2.56 Gbps and -8 dBm at 10 Gbps,
respectively. Further improvements with a gold-finger interface and a more
compact optical lens are being designed.
