A 1.55 $\mu$m 40 Gbps EML TOSA Employing a Novel FPC Connection

We have developed a 1.55-μm 40 Gbps electro-absorption modulator laser (EML)-based transmitter optical subassembly (TOSA) using a novel flexible printed circuit (FPC). The return loss at the junctions of the printed circuit board and the FPC, and of the FPC and the ceramic feedthrough connection was held better than 20 dB at up to 40 GHz by a newly developed three-layer FPC. The TOSA was fabricated and demonstrated a mask margin of >16% and a path penalty of <;0.63 dB for a 43 Gbps signal after 2.4-km SMF transmission over the entire case temperature range from -5° to 80 °C, demonstrating compliance with ITU-T G.693. These results are comparable to coaxial connector type EML modules. This TOSA is expected to be a strong candidate for 40 Gbps EML modules with excellent operating characteristics, economy, and a small footprint.

[1]  Tadashi Ikeuchi,et al.  Compact 40 Gbit/s EML Module Integrated with Driver IC , 2009, IEICE Trans. Electron..

[2]  T. Hatta,et al.  43 Gbit/s EAM-LD module with built-in driver IC employing novel cathode-floating bias circuit , 2008, 2008 34th European Conference on Optical Communication.

[3]  Tadashi Ikeuchi,et al.  Compact 40-Gb/s EML module using broadband FPC connection technique , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[4]  S. Ide,et al.  1.3- $\mu$m AlGaInAs Multiple-Quantum-Well Semi-insulating Buried-Heterostructure Distributed-Feedback Lasers for High-Speed Direct Modulation , 2009, IEEE Journal of Selected Topics in Quantum Electronics.

[6]  Hiroaki Hayashi,et al.  High-Speed EA-DFB Laser for 40-G and 100-Gbps , 2009, IEICE Trans. Electron..

[7]  Y. Mitsui,et al.  Small-chirp 40-Gbps electroabsorption modulator with novel tensile-strained asymmetric quantum-well absorption layer , 2003 .

[8]  T. Hatta,et al.  A compact 44.6 Gbps 1.55-µm EML TOSA employing three-layer FPC connection , 2013, 2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching (OECC/PS).

[9]  N. Okada,et al.  1.3 μm EML TOSA for Serial 40 Gbps Ethernet solution , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[10]  Naoki Fujiwara,et al.  40-Gb/s Operation of a 1.3-/1.55-μm InGaAlAs Electroabsorption Modulator Integrated With DFB Laser in Compact TO-CAN Package , 2011, IEEE Journal of Selected Topics in Quantum Electronics.

[11]  Naoki Fujiwara,et al.  40-Gbps direct modulation of 1.3-µm InGaAlAs DFB laser in compact TO-CAN package , 2011, 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference.

[12]  K. Nakahara,et al.  40-Gb/s Direct Modulation With High Extinction Ratio Operation of 1.3-$\mu$m InGaAlAs Multiquantum Well Ridge Waveguide Distributed Feedback Lasers , 2007, IEEE Photonics Technology Letters.

[13]  C. Cole.  Next generation CFP modules , 2012, OFC/NFOEC.