Right-Angle-Bent CPW for the Application of the Driver-Amplifier-Integrated 40 Gbps TW-EML Module

In this letter we present a right-angle-bent coplanar waveguide (CPW) which we developed for the application of the driver amplifier-integrated (DAI) 40 Gbps traveling wave electroabsorption modulated laser module. The developed CPW realized parallel progression of the radio frequency (RF) and light using a dielectric overlay structure and wedge bonding on the bending section. The measured S11 and S21 of the developed CPW were kept below -10 dB up to 35 GHz and -3 dB up to 43 GHz, respectively. These measured results of the CPW were in good agreement with the simulation results and demonstrated the applicability of the CPW to the 40 Gbps communication module.

[1]  Jang-Kyoo Shin,et al.  Fabrication of thick silicon dioxide air-bridge for RF application using micromachining technology , 2001, Digest of Papers. Microprocesses and Nanotechnology 2001. 2001 International Microprocesses and Nanotechnology Conference (IEEE Cat. No.01EX468).

[2]  Kwang-Seong Choi,et al.  Optimization of Packaging Design of TWEAM Module for Digital and Analog Applications , 2004 .

[3]  P.M. Watson,et al.  EM-ANN modelling and optimal chamfering of 90/spl deg/ CPW bends with air-bridges , 1997, 1997 IEEE MTT-S International Microwave Symposium Digest.

[4]  Yong-Hwan Kwon,et al.  Fabrication of 40 Gb/s Front‐End Optical Receivers Using Spot‐Size Converter Integrated Waveguide Photodiodes , 2005 .

[5]  M. G. Stubbs,et al.  Effects of air-bridges and mitering on coplanar waveguide 90 degrees bends: theory and experiment , 1993, 1993 IEEE MTT-S International Microwave Symposium Digest.

[6]  G. Ponchak,et al.  Modeling of some coplanar waveguide discontinuities , 1988, 1988., IEEE MTT-S International Microwave Symposium Digest.

[7]  T.M. Weller,et al.  Optimization of MM-wave distribution networks using silicon-based CPW , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[8]  G. E. Ponchak,et al.  Channelized coplanar waveguide: discontinuities, junctions, and propagation characteristics , 1989, IEEE MTT-S International Microwave Symposium Digest.

[9]  K. Yamada,et al.  EAM-integrated DFB laser modules with more than 40-GHz bandwidth , 2001, IEEE Photonics Technology Letters.