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Journal Article A 10 × 10 Gb/s DFB Laser Diode Array Fabricated Using a SAG Technique
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Authors
Oh Kee Kwon, Yong Ahn Leem, Young Tak Han, Chul Wook Lee, Ki Soo Kim, Su Hwan Oh
Issue Date
2014-04
Citation
Optics Express, v.22, no.8, pp.9073-9080
ISSN
1094-4087
Publisher
Optical Society of America(OSA)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1364/OE.22.009073
Project Code
13VB1700, Energy Efficient Power Semiconductor Technology for Next Generation Data Center, Eun Soo Nam
Abstract
We present a ten-channel distributed feedback laser diode array (DFB-LDA) developed for the transmission of 100-Gb/s (10 × 10 Gb/s) signals separated by an 8 nm wavelength grid at a center wavelength of 1.55 μm. For the fabrication of this type of laser array, a selective area growth (SAG) technique, electron-beam lithography, and a reverse-mesa ridge waveguide LD processing technique were adopted to offer a tailored gain spectrum to each channel, providing both accurate lasing-wavelength control and excellent single-mode yield over all channels, and reducing the fabrication cost and electrical and thermal resistances. To evaluate the operational performance of the fabricated chip systematically, we also developed a sub-assembly module containing a ten-channel ?/4-shifted DFB-LDA, ten matching resistors, flexible printed circuit board (FPCB) wiring, and a thermistor on a metal optical bench. The static and dynamic properties of all channels of the fabricated array are examined in this paper. The developed sub-assembly module shows a side-mode suppression ratio (SMSR) of > 50 dB, a modulation bandwidth of > 10 GHz, and a clear eyeopening before and after a 2-km transmission with dynamic extinction ratio of > 5 dB.©2013 Optical Society of America.
KSP Keywords
10 Ghz, Center wavelength, DFB laser, Distributed feedback laser diode, Distributed feedback lasers(DFBs), Flexible printed circuit board(FPCB), Gain spectrum, Laser array, Laser diode(LD), Laser diode array, Modulation bandwidth
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