Abstract
A large bandwidth transistor outline (TO)-CAN header used in a low cost
laser module was designed through a three dimensional full wave
electromagnetic simulation and demonstrated by a direct measurement
technique. The simulation results show that the proposed TO-CAN header
provides a resonance-free transmission bandwidth in excess of 40 GHz with a
reflection loss of 25 GHz under -10 dB with an ideal 50 Ω terminal. A pair of specially designed K type adaptors was used
to accommodate the TO-CAN header for the high frequency measurements. This
is a direct contact setup, without extra parasitic effects, and allowing a
near resonance-free measurement. The experimental results are in good
agreement with simulated results in the frequency range up to 40 GHz. A
time-domain reflectometry measurement and a 40 Gbit/s eye diagram test were
made to verify the performance. In addition, a laser module packaged with
the TO-CAN header is proposed. By taking the bonding wires into account, the
simulated transmission bandwidth of the module is over 35 GHz and a clear 25
Gbit/s eye diagram is obtained. This cost effective package solution of
laser module can be applied in the next generation 100 Gigabit Ethernet (100
GbE) network.
© 2011 IEEE
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