Fabrication and Characteristics of 40-Gb/s Traveling-Wave Electroabsorption Modulator-Integrated DFB Laser Modules

• Published in: IEEE transactions on advanced packaging 2008-05, Vol.31 (2), p.351-356
• Main Authors: YUN, Ho-Gyeong, CHOI, Kwang-Seong, KWON, Yong-Hwan, CHOE, Joong-Seon, MOON, Jong-Tae
• Format: Article
• Language: English
• Subjects: Amplifiers; Applied sciences; Bandwidth; Circuit properties; Coplanar waveguide (CPW); Coplanar waveguides; Design. Technologies. Operation analysis. Testing; Device driver programs; Devices; Distributed feedback devices; Driver circuits; Electric variables measurement; Electric, optical and optoelectronic circuits; electroabsorption modulator-integrated laser; Electronic circuits; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Exact sciences and technology; Integrated circuits; Integrated optoelectronics. Optoelectronic circuits; Laser feedback; Lasers; Loss measurement; Modules; Noise levels; Optical amplifiers; Optical and optoelectronic circuits; Optical device fabrication; Optical waveguides; packaging; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; transmission line; traveling-wave
• ISSN: 1521-3323; 1557-9980
• DOI: 10.1109/TADVP.2008.920656

We have developed 40-Gb/s traveling-wave electroabsorption-modulator-integrated distributed feedback laser (TW-EML) modules using several advanced technologies. First, we have adopted a selective area growth (SAG) method in the fabrication of the 40-Gb/s EML device to provide active layers for the laser and the electroabsorption modulators (EAMs) simultaneously. The fabricated device shows that the measured 3-dB bandwidth of electrical-to-optical (E/O) response reaches about 45 GHz and the return loss (S 11 ) is kept below -10 dB up to 50 GHz. For the module design of the device, we mainly considered electrical and optical factors. The measured S 11 of the fabricated 40 Gb/s TW-EML module is below -10 dB up to about 30 GHz and the 3-dB bandwidth of the E/O response reaches over 35 GHz. We also have developed two types of coplanar waveguide (CPW) for the application of the driver amplifier integrated 40 Gb/s TW-EML module, which is a system-on-package (SoP) composed of an EML device and a driver amplifier device in a module. The measured S 11 of the two-step-bent CPW is below -10 dB up to 35 GHz and the measured S 11 of the parallel type CPW is below -10 dB up to 39 GHz.