Development of 14 Gbit/s Uncooled TOSA with Wide Operating Temperature Range

摘要

The authors have successfully developed new TOSAs (Transmitter Optical Sub-Assembly) which are operational for a wide operating temperature range from -40 to 90 degree C and at a high speed of 10 Gbit/s or more. The devices introduced multi-layer ceramic packages with a precisely controlled characteristic impedance and wide band width up to 23 GHz. In addition, an optical system using front facet monitoring technique has achieved stable tracking error characteristics within ±0.2 dB. A newly designed laser driver IC is also mounted in a package to ensure both high speed performance for 16GFC and low power consumption for high density aggregation of transmission systems.